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- Cyclic voltammetry (74)
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Articles 1291 - 1320 of 2294
Full-Text Articles in Physical Sciences and Mathematics
Inhibition Mechanism Of The Imidazoline Derivate In H_2s Solution, Jing-Mao Zhao, He-Xia Liu, Chao Xiao, Yuan Lu
Inhibition Mechanism Of The Imidazoline Derivate In H_2s Solution, Jing-Mao Zhao, He-Xia Liu, Chao Xiao, Yuan Lu
Journal of Electrochemistry
Weight-loss method and polarization curve measurement were employed to study the inhibition mechanism of imidazoline derivate for mild steel in acidic solution with H2S.The results show that the derivate can retard the cathodic process,and belongs to the cathodic-type inhibitor.The adsorption of the derivate on the surface of mild steel accords with the amended Langmuir adsorption isothermal equation,and higher temperature will facilitate its adsorption.The changes in the apparent activation energy(Ea) and the pre-exponential factor(A) of the corrosion reaction before and after the addition of inhibitor were also discussed.
Preparation And Electrochemical Performance Of Ordered Mesoporous Titanium Phosphate As Cathode Material For Li-Ion Battery, Qiong Wang, Attia Adel, Zhi-Cong Shi, Yong Yang
Preparation And Electrochemical Performance Of Ordered Mesoporous Titanium Phosphate As Cathode Material For Li-Ion Battery, Qiong Wang, Attia Adel, Zhi-Cong Shi, Yong Yang
Journal of Electrochemistry
Ordered porous titanium phosphate materials were prepared by using the surfactant template combined with the sol-gel method.The samples were characterized by small angle X-ray diffraction(SA-XRD) method,N2 adsorption/desorption techniques,high resolution transmission electron microscopy(HRTEM) and element analysis.It is found that the calcination temperature is a big influence on the porous structure,and electrochemical performance of the titanium phosphate materials.,and the mesoporous titanium phosphate showed good performance in the electrochemical test,the first discharge capacity is 94 mAh/g at the current density of 150 mA/g.On the other hand,the no porous material with a low capacity of 37 mAh/g under the same charge-discharge condition.
Study On The Binding Mode Of In(Bpy)Cl_3·H_2o With Dna By The Methods Of Electrochemistry, Jun-Wei Wang, Jian-Guo Ren, Bao-Juan Zhou, Xiao-Ling Gao, Yan-Ni Tian
Study On The Binding Mode Of In(Bpy)Cl_3·H_2o With Dna By The Methods Of Electrochemistry, Jun-Wei Wang, Jian-Guo Ren, Bao-Juan Zhou, Xiao-Ling Gao, Yan-Ni Tian
Journal of Electrochemistry
The complex In(bpy)Cl3·H2O was synthesized.The binding mode of the complex with DNA was studied by the methods of cyclic voltammetry(CV),differential pulse voltammetry and ac impedance in the buffer Tris-HCl(pH=7.2).A quasi-reversible redox wave for the central Indium ion from the cyclic voltammograms was shown at a PG electrode.It has been found that after the complex acted with DNA,The complex's formal potential negatively shifted from-0.696 V to-0.717 V,the values of the reduction peak current and apparent diffusion coefficient decreased significantly.The results of differential pulse voltammetry were the same as cyclic voltammetry,and the electrochemical reaction resistance values increased from 143 Ω·cm2 to 169 …
Corrosion Electrochemical Behavior Of Az31 And Az61 Magnesium Alloys In Simulated Sea Water, Ling-Jie Li, Sheng-Hai Yu, Jing-Lei Lei, Chuan-Pu Liu, Sheng-Tao Zhang, Fu-Sheng Pan
Corrosion Electrochemical Behavior Of Az31 And Az61 Magnesium Alloys In Simulated Sea Water, Ling-Jie Li, Sheng-Hai Yu, Jing-Lei Lei, Chuan-Pu Liu, Sheng-Tao Zhang, Fu-Sheng Pan
Journal of Electrochemistry
Tafel polarization curves and electrochemical impedance spectroscopy(EIS) techniques were employed to investigate the corrosion electrochemical behavior of AZ31 and AZ61 magnesium alloys.Scanning electron microscopy(SEM) was used to observe the alloy microstructure and corrosion morphology.The variation of the bulk corrosive medium pH with immersion time was recorded during the exposure of the alloys to simulated sea water.Results show that AZ61 magnesium alloy exhibits much better anti-corrosion ability than AZ31 magnesium alloy.The different corrosion behavior between the two magnesium alloys is correlated with their different content of Al alloying element.The higher content of Al in AZ61 alloy leads to the homogenerous microstructure …
The Determination Of Vitamin C By Bromophenol Blue Modified Glassy Carbon Electrode, Shu-Lin Zhang, Min-Jiao Li, Yi Luo, Xiao-Bo Wang
The Determination Of Vitamin C By Bromophenol Blue Modified Glassy Carbon Electrode, Shu-Lin Zhang, Min-Jiao Li, Yi Luo, Xiao-Bo Wang
Journal of Electrochemistry
The content of ascorbic acid of(vitamin C) was analyzed by using fast cyclic voltamment with bromophenol blue(BPB) modififed GC-electrode,and which experimental conditions were optimiged.The results showed that the BPB modified GC-electrode had the good stability and anti-jamming faculty for analysing the content of ascorbic acid.A linear relationship between the peak current and concentration of vitamin C in the range of 0.0050~0.1500 g·L-1 was obtained,which related coefficient and the detection limit are-0.9991 and 0.0010 g·L-1,respeclively.The method has satisfactory results.
Study Of Black Electromagnetic Shielding Fabric, Shao-Wen Lu, Wei Wang, Bin Sun
Study Of Black Electromagnetic Shielding Fabric, Shao-Wen Lu, Wei Wang, Bin Sun
Journal of Electrochemistry
A soft electromagnetic shielding fabric was successfully prepared by electroplating black nickel on the Cu-plated PET fabric,preliminary thechnigue conditions were carried out as NiSO4·6H2O 40 g·L-1,H3BO3 30 g·L-1,NiSO4·(NH4)SO4·6H2O 40 g·L-1,ZnSO4·7H2O 50 g·L-1,NH4CNS 20 g·L-1,pH=4,t=30℃.The expericments showed that the soft electromagnetic shielding fabric had good conductive and electromagnetic shielding effectiveness,great abrasion resistance and erosion resistance performance and excellent absorbency performance,all of these promote the fabric decoration,protection and absorbency property.
Mechanism Of The Cathode Reduction Of Ti(Ⅳ) In Molten Na_3alf_6-Alf_3, Hai-Bin Sun, Xiu-Rong Zuo, Zhi-Guo Zhong, Xue-Hui Hu
Mechanism Of The Cathode Reduction Of Ti(Ⅳ) In Molten Na_3alf_6-Alf_3, Hai-Bin Sun, Xiu-Rong Zuo, Zhi-Guo Zhong, Xue-Hui Hu
Journal of Electrochemistry
The mechanism of TiO2 electrode process has been investigated by cyclic voltammetry and chronopotentiometry on the tungsten filament in molten Na3AlF6-AlF3 salts at 990 ℃.The experimental results showed that electrochemical reduction of Ti(Ⅳ) precede were two steps,firstly Ti(Ⅳ) was reduced to Ti(Ⅱ),then Ti(Ⅱ) was reduced to Ti,namely: Ti(Ⅳ)→Ti(Ⅱ)→Ti.
A Study On Supercapacitor Based On Aligned Carbon Nanotubes, Xiao-Yan Ye, Yan-Zhi Wang, Hai-Yan Song, Zhuo Sun, Pin-Gang He, Yu-Zhi Fang
A Study On Supercapacitor Based On Aligned Carbon Nanotubes, Xiao-Yan Ye, Yan-Zhi Wang, Hai-Yan Song, Zhuo Sun, Pin-Gang He, Yu-Zhi Fang
Journal of Electrochemistry
Large scale vertically aligned carbon nanotubes(ACNTs) with uniform length and diameter were prepared by the pyrolysis of iron(Ⅱ) phthalocyanine at low pressure.The ACNTs were activated by electrolyte-activation,acid-activation or electrochemical activation.The performance of the capacitor based on activated ACNTs was characterized by cyclic voltammograms which was of rectangular shape,impedence spectroscopy in which the phase is above 80° and the result specific capacitance was 16～32 F/g,which suggest that the ACNTs are the promising material for the supercapacitor.
Molten Salt Treatment Of Mno_2 And Investigation On Supercapacitor Properties, Ye Chen, Zun-Bo Zhang, Wei Zhang, Liang Liu, Zhi-Min Liu
Molten Salt Treatment Of Mno_2 And Investigation On Supercapacitor Properties, Ye Chen, Zun-Bo Zhang, Wei Zhang, Liang Liu, Zhi-Min Liu
Journal of Electrochemistry
The MnO2 prepared by solid phase method is treated by KCl-NaCl-LiCl molten salt system.The XRD patterns indicated that the crystal structures of MnO2 sample have had the α-MnO2 and γ-MnO2 phase,the crystallinity of sample is increased after treated by molten salt.The electrochemical properties were tested by cyclic voltammetry,constant current charge/discharge and AC impedance.The result shows that the supercapacitor performance of the treated material has improved.The specific discharge capacitance of the treated sample are 129.07 F·g-1,increased by 27.88% compared to 100.94 F·g-1 of untreated sample.Long cycle life and high coulombic efficiency were also demonstrated after charge/discharge 100 cycles.The value of RESR …
A Quick Charge System For The Agv Automatic Guided Vehicle, Chun-Yuan Pian, Jun-Feng Liu
A Quick Charge System For The Agv Automatic Guided Vehicle, Chun-Yuan Pian, Jun-Feng Liu
Journal of Electrochemistry
The quick charge system used for AGV automation guidance vehicle nickel hyarogen driving force battery,witch can test and compute parameter in real time during charging process,judge logically,control the charging process and adopt a depolarization to discharge in order to improve charging efficiency.
Cu Doping Lifepo_4 And Its Electrochemical Performance, Ming-Sen Zheng, Shan-Ke Liu, Shi-Gang Sun, Quan-Feng Dong
Cu Doping Lifepo_4 And Its Electrochemical Performance, Ming-Sen Zheng, Shan-Ke Liu, Shi-Gang Sun, Quan-Feng Dong
Journal of Electrochemistry
LiFePO4 and LiFePO4 doped with Cu2+ ions were synthesized by solid-state reactions.The structure of LiFePO4 and the Fe valence were analyzed by the XRD(X-ray diffraction) and XPS(X-ray photoelectron spectroscopy) respectively.The Cu doping position in LiFePO4 is discussed.It has found that the volume of LiFePO4 by doping Cu2+ ions is reduced.The minim Cu2+ ions doping does not almost change the binding energy of Fe2p1/2 in LiFePO4.According to the experiment results,we conclude that most of the Cu2+ ions substitute the Fe2+ ions in LiFePO4 when a small amount of Cu2+ ions doping is occurred.
In Situ Measurement Of Chloride Concentration And Ph Distribution In The Crevice During The Crevice Corrosion Of Copper Electronic Board, Min Zhang, Xiang-Dong Zhuo, Chang-Jian Lin
In Situ Measurement Of Chloride Concentration And Ph Distribution In The Crevice During The Crevice Corrosion Of Copper Electronic Board, Min Zhang, Xiang-Dong Zhuo, Chang-Jian Lin
Journal of Electrochemistry
Although the crevice corrosion of metals had been extensively studied in the past years,it remained lack of direct experimental information of the micro chemical environments and electrochemical conditions inside the corroding crevice.The distribution of chloride concentration and local pH in the occluded area are the most crucial factors in development of crevice corrosion.The array probes in one dimension of Ag/AgCl and IrO2 array were developed in this work to in situ follow the distribution of chloride concentration and local pH in the occluded area during the crevice corrosion propagation.Based on a designed simulated crevice corrosion system in 0.5mol/L NaCl solution,the …
Synthesis Of 2,2′-Dichlorohydrazobenzene Using An Ion Exchange Membrane, Chao Zhang, Pei-Jin Li
Synthesis Of 2,2′-Dichlorohydrazobenzene Using An Ion Exchange Membrane, Chao Zhang, Pei-Jin Li
Journal of Electrochemistry
Using an ion exchange membrane as a separator,the 2,2′-Dichlorohydrazobenzene is synthesized by the electrolytic reduction of o-chloronetrobenzene.The effects of electrode activation condition,current density,electrolyte temperature on electrolytic reduction are discussed.It was found that the optimum reaction temperature is 80 ℃.When the electrolyte concentration was 30% NaOH at the anode and 10% NaOH at the cathode,current density is 4.2A/dm2,the current efficiency reached 73% and yield is 83%.
The Influence Of The Sputtering Power On The Structural And Electrochemical Properties Of Tin Oxide Films, Min-Zhen Cai, Jie Song, Ming-Sen Zheng, Qi-Hui Wu, Sun-Tao Wu, Quan-Feng Dong
The Influence Of The Sputtering Power On The Structural And Electrochemical Properties Of Tin Oxide Films, Min-Zhen Cai, Jie Song, Ming-Sen Zheng, Qi-Hui Wu, Sun-Tao Wu, Quan-Feng Dong
Journal of Electrochemistry
Tin oxide films were deposited on silicon substrates at room temperature using the radio frequency(RF) magnetron sputtering with different sputtering power.The influence of sputtering power upon the crystal structure,surface morphology and electrochemical properties of tin oxide films were then investigated.The XRD and SEM results illustrate that the phase of tin oxide thin films changed from amorphous to crystalline and the grain size augments with the increase of the sputtering power.The constant current charge and discharge cycle tests imply that the initial irreversible capacity loss of Li/tin oxide batteries increase and which capacity decrease as the sputtering power increases.The sputtering power …
Square Wave Stripping Voltammetric Behaviors Of Rutin On Glassy Carbon Electrode And Its Application, Jun Hua, Xiao-Ying He, Fang Liao, Qing-Tao Zhu
Square Wave Stripping Voltammetric Behaviors Of Rutin On Glassy Carbon Electrode And Its Application, Jun Hua, Xiao-Ying He, Fang Liao, Qing-Tao Zhu
Journal of Electrochemistry
The electrochemical behaviors of rutin(Rt) at glassy carbon electrode were studied by square wave stripping voltammeter in the presence of 0.1mol·L-1HAc-NaAc buffer solution(pH=3.0).The sensitive oxidation peak of rutin was observed and which potential peak is 0.46V(vs.SCE).The experimental parameters,such as pH value,deposition potential and deposition time were investigated and selected.The peak currents were proportional to the concentration of rutin in range of 5.0×10-8 mol·L-1~1.0×10-6mol·L-1,and the linear regression coefficient equaled 0.99799,the detection limit was 1.1×10-8 mol·L-1.This method was applied to the determination of rutin content in tablet with satisfactory results.
Electrochemical Behavior Of 6-Substituted Purines And Its Interaction With Dna, Bao-Yi Lu, You-Zhi Zheng, Hong Li
Electrochemical Behavior Of 6-Substituted Purines And Its Interaction With Dna, Bao-Yi Lu, You-Zhi Zheng, Hong Li
Journal of Electrochemistry
The electrochemical behavior of 6-furfurylaminopurine(6-KT) and 6-mercaptopurine(6-MP) on a mercury electrode has been investigated using cyclic voltammetry and differential pulse voltammetry.It is found that there are two pairs of redox waves for 6-KT and 6-MP on the mercury electrode controlled by diffusion and adsorption,respectively.The anodic peak currents of the diffusion-controlled wave increase with the adding concentration of 6-substituted purines.A good linear relationship for 6-KT and 6-MP is revealed in the concentration range from 0.1 to 50.0 μmol·L-1.Based on the effects of accumulating time and pH values on the cathodic peak potentials and currents of adsorption-controlled waves,their adsorption mechanism is discussed.The …
Effect Of Au At Different States On Electrocatalytic Performance Of Pd Catalyst For Oxidation Of Formic Acid, Xin Wang, Ya-Wen Tang, Tian-Hong Lu
Effect Of Au At Different States On Electrocatalytic Performance Of Pd Catalyst For Oxidation Of Formic Acid, Xin Wang, Ya-Wen Tang, Tian-Hong Lu
Journal of Electrochemistry
Using liquid-reduction or complex-redution method,four catalysts,i.e,the Au/C,Pd/C,Pd-Au/C-T and Pd-Au/C-H were preparated and which electroanalytic activities and stabilities for the oxidation of formic acid were compares.It was found that the Au/C catalyst has no electrocatalytic activity,and the Pd/C catalyst possesses the good electrocatalytic performance for the oxidation of formic acid.The addition of Au into the Pd/C catalyst can increase the electrocatalytic activity and stability.Especially,the electrocatalytic activity and stability of the Pd-Au/C-T catalyst with the alloy of Pd and Au are better than that of the of the Pd-Au/C-H catalyst,in which,Pd and Au do not form the alloy.The investigation of its reason …
Quantized Capacitance Charging Of Self-Assembled Monolayer Protected Gold Clusters, Li Wen, Jian-Zhang Zhou, Qiao-Lin Chen, Guo-Liang Chen, Zhong-Hua Lin
Quantized Capacitance Charging Of Self-Assembled Monolayer Protected Gold Clusters, Li Wen, Jian-Zhang Zhou, Qiao-Lin Chen, Guo-Liang Chen, Zhong-Hua Lin
Journal of Electrochemistry
Quantized capacitance charging was observed for the C12Au monolayer-protected clusters self-assembled on a gold electrode surface in CH2Cl2 solution at room temperature.The result from differential pulse voltammetry(DPV) of C12Au MPC with average core diameter of 2.0 nm showed that which appear nine entries well-defined quantized capacitance charging peaks within the potential range of-0.6 to +0.6 V.The change trend of MPC double-layer capacitances(CMPC) was that the value of CMPC was smallest near zero charge potential and increased with potential positive or negative transfer.In addition,the effect of Au core size on quantized capacitance charging of C12Au MPC was studied.The results showed that …
Synthesis Of Adipic Acid From Cyclohexanol By Electrochemical Oxidation Using Cr_2o_7~(2-)/Cr~(3+) As Indirect Oxidant, Zhen-Hai Liang, Yu-Qing Cui, Hong-Yan Sun
Synthesis Of Adipic Acid From Cyclohexanol By Electrochemical Oxidation Using Cr_2o_7~(2-)/Cr~(3+) As Indirect Oxidant, Zhen-Hai Liang, Yu-Qing Cui, Hong-Yan Sun
Journal of Electrochemistry
Adipic acid was synthesized by electro-oxidation of cyclohexanol taking Cr2O72-/Cr3+ as indirect oxidant.The best technological conditions were optimized by orthogonal experiment.The optimum condition are as follows: the temperature is 35℃,ratio of crude material is n(cyclohexanol)∶n(Cr2O72-)=0.4∶1 and concentration of H2SO4 is 4 mol·L-1.Under these conditions,the yield of adipic acid can reach 70.29%.Moreover,The effects of concentration of Ag2SO4,(NH4)2SO4,H2SO4and current density on the formation of Cr2O72-were also explored.The rate of Cr3+ conversion can reach 82.52%.
Interfacial Electrochemical Behavior Of Fibrinogen On Pt Electrode, Song-Mei Chen, Jian-Zhang Zhou, Zhong-Hua Lin, Dong-Mei Zeng, Nan Huang, Guo-Jiang Wan
Interfacial Electrochemical Behavior Of Fibrinogen On Pt Electrode, Song-Mei Chen, Jian-Zhang Zhou, Zhong-Hua Lin, Dong-Mei Zeng, Nan Huang, Guo-Jiang Wan
Journal of Electrochemistry
The interfacial electrochemical behaviors of fibrinogen on Pt electrode in phosphate buffered solution(PBS) was investigated by using cyclic voltammetry and electrochemical in-situ FTIR spectroscopy.The cyclic voltammetry results demonstrated that the fibrinogen adsorb on Pt electrode and impede the interfacial charge transfer of hydrogen ion reaction process as well as of oxygen reduction process,which is increased with higher scan rate.The cyclic voltammetry spectra of platinum absorbed with fibrinogen in K3[Fe(CN)6] and K4[Fe(CN)6]·3H2O solutions shows that the fibrinogen can partly decrease the oxidation and reduction current peaks.There is no specific anodic and cathodic current peaks found to attributed from fibrinogen within potential …
Potentiometric Response Of Glucose On Mno_2-Go_X Carbon Paste Electrode, Cai-Juan Wang, Xiao-Ya Hu
Potentiometric Response Of Glucose On Mno_2-Go_X Carbon Paste Electrode, Cai-Juan Wang, Xiao-Ya Hu
Journal of Electrochemistry
A novel carbon paste electrode(CPE) modified with MnO2 and glucose oxidase(GOx),is reported.Different factors,such as the effect of supporting electrolyte,pH of solutions,various paste glues,the amount of MnO2 and temperature,which may influence the determination of H2O2 and glucose were tested to optimize.Based on above,potentiometric determination of glucose was achieved in neutral solution and at 35 ℃,the electrode gave a response of 36.12～34.62 mV/pGlucose between 2.0×10-5mol·L-1 and 5.2×10-3 mol·L-1 with a detection limit of 3.3×10-6 mol·L-1.Moreover,this kind of the electrode had good stability and reproducibility.Most normal anion,cation,isotol,glycerin and amide will not interfere the determination of glucose.
Effects Of Oxidation Methods On The Stability Of Coooh Conductive Network In Foam Nickel Electrodes, Xiao-Feng Li, Yan-Wei Wei, Hui-Chao Dong
Effects Of Oxidation Methods On The Stability Of Coooh Conductive Network In Foam Nickel Electrodes, Xiao-Feng Li, Yan-Wei Wei, Hui-Chao Dong
Journal of Electrochemistry
Two kinds of the cobalt oxyhydroxide conductive networks in foam nickel electrodes were prepared by different methods i.e.the electrochemical-oxidation(EO) and chemical-oxidation(CO) and which redox behaviors were studied by using cyclic voltammetry and X-ray diffraction measurements.The results show that the CoOOH(CO) has better redox reversibility than CoOOH(EO) and the structure of the former can be kept when nickel electrodes are subjected to a negative potential.Thus,98.7% capacity retention is demonstrated on nickel/metal-hydride batteries with CoOOH(CO) conductive network after being imposed over-discharge state storage;on the contrary,only 83.3% capacity retention is found on the batteries with CoOOH(EO) conductive network.
Electrochemical Oxidization Of Herring Sperm Dna And Its Interaction With Histone, Juan Xu, Gui-Ping Huang, Hong Li, Wei Zhu
Electrochemical Oxidization Of Herring Sperm Dna And Its Interaction With Histone, Juan Xu, Gui-Ping Huang, Hong Li, Wei Zhu
Journal of Electrochemistry
The voltammetric behavior of herring sperm DNA at glassy carbon electrode and its interaction with histone have been investigated by using cyclic voltammetry,differential pulse voltammetry,and fluorescence measurement.In the potential range of 0.20 V to 1.25 V,it is found that an irreversible oxidative peak is exhibited in acid solution,but in the neutral or alkaline solution two oxidative peaks are observed.Oxidative peak potential values show a negative shift with increasing pH via a slope of-57 mV·pH-1 and a linear relation with DNA concentration in the range of 0.45 to 8.20 mmol·L-1.In the presence of histone,the oxidative peak current of DNA and the …
Eiectro-Oxidation Of Methanol On Pdnio/C Catalyst In Alkaline Medium, Mei-Li Wang, Lin Sang, Cheng-De Huang
Eiectro-Oxidation Of Methanol On Pdnio/C Catalyst In Alkaline Medium, Mei-Li Wang, Lin Sang, Cheng-De Huang
Journal of Electrochemistry
The electro-oxidation of methanol in alkaline electrolyte at in-house synthesized PdNiO/C and Pd/C catalysts and the effect of heat treatment on the structure and performance of catalysts were studied by cyclic voltammetry,chronoamperometry,chronopotentiometry and X-ray diffraction methods.It is shown that when the reduction temperature is 70℃ and the ratio between Pd and Ni is 8∶2,The PdNiO/C catalyst presents a highest activity for methanol electrooxidation.Calcining can increase the particle size and crystallinity of catalysts,but decrease the dispersion and activity of catalysts, too.Besides,the NiO is disengaged from Pd lattice by heat-treatment.The optimal PdNiO/C catalyst shows higher catalytic activity and much better poisoning resistance …
Study On Electrochemical Impedance Spectroscopy Of Carbon Steel Eroded In Methyldiethanolamine Solution, Dong-Ping Wei, Rong-Zong Hu, Dan-Mei Pan, Wei-Xiong Huang, Rui Dong
Study On Electrochemical Impedance Spectroscopy Of Carbon Steel Eroded In Methyldiethanolamine Solution, Dong-Ping Wei, Rong-Zong Hu, Dan-Mei Pan, Wei-Xiong Huang, Rui Dong
Journal of Electrochemistry
Corrosion behavior of carbon steel in methyldiethanolamine(MDEA) solution was investigated by Electrochemical Impedance Spectroscopy(EIS).The results were showed that the corrosion rate of carbon steel in solution containing dissolved oxygen is higher than that in solution removed of dissolved oxygen before cathodic activation.They were reversed after cathodic activation.The corrosion rate is increased at first and then decreased when the concentration of MDEA is increased in the blank solutions.In the simulated solutions containing quantities of!heat-stable salts(HSS),the corrosion rate is decreased monotonously with increase of the MDEA concentration.As anodic polarization potential is increased,the EIS of carbon steel in HSS simulated solution showed characteristics …
Electrochemical Behavior Of Zinc Alloy Anode In Ca(Oh)_2 Solutions Of Different Ph, Peng-Ying Ren, Ji-Quan He
Electrochemical Behavior Of Zinc Alloy Anode In Ca(Oh)_2 Solutions Of Different Ph, Peng-Ying Ren, Ji-Quan He
Journal of Electrochemistry
The polarization curves of zinc alloy anodes in Ca(OH)2 solutions have been measured by potentiodynamic method,and the composition of corrosion products were examined by X-ray-diffraction(XRD).The experimental results indicated that not only the electrochemical behavior of zinc alloy anodes were absolutely different in every alkaline solutions,but also many electrochemical parameters were determined,such as zero current potential(E0),the density of corrosion current(icorr),passive current density(ip),breakdown potential(Eb),and so on.There were three zero current potential when zinc alloy anodes in some Ca(OH)2 solutions which made passive state unstable.The graphs of E-pH about zinc alloy anodes dipped in different Ca(OH)2 solutions were drawn,and compared with the potential-pH …
Electrochemical Behavior Of Dill Pipe In 31%(By Mass)Nacl Solution Based New Type Inhibitor, Fu-Guo Liu, Min Du, Qing-Zhang Wang
Electrochemical Behavior Of Dill Pipe In 31%(By Mass)Nacl Solution Based New Type Inhibitor, Fu-Guo Liu, Min Du, Qing-Zhang Wang
Journal of Electrochemistry
The inhibitive effect of compound inhibitor including emulsifier(P)、zinc sulfate、sodium polyphosphate、Glucose Gluconate was studied in 31% NaCl(bymass) solution.The inhibitory mechanism was analyzed by polarization curve and EIS.The results showed that the compound inhibitor was anodic-type inhibitor and its inhibitive effect on anodic and cathodal reaction was the most obvious at 200×10-6g·L-1.And the results of EIS revealed that the inhibition efficiency increased and the film formed on electrode surface was more and more compact with time.Inhibition mechanism was different with concentration of inhibitor.
A New Method To Reduce The Contact Resistance Between Metal Current Collector And Graphite Plate For Pemfc, Hao Sun, Ming Han, Meng-Kai Liu, Jun-Bo Jia, Yao-Tian Zhan
A New Method To Reduce The Contact Resistance Between Metal Current Collector And Graphite Plate For Pemfc, Hao Sun, Ming Han, Meng-Kai Liu, Jun-Bo Jia, Yao-Tian Zhan
Journal of Electrochemistry
A new method to reduce the contact resistance between metal current collector and graphite plate for PEMFC has been proposed.It was found that the contact resistance between the stainless steel current collector and graphite plate after embedding a metal net-carbon polymer composition is effective by to eliminate,Fuel cell testing has presented that this new method can effectively reduce the internal resistance of PEMFC,and improve the performance of the PEM fuel cell.
Study On The Corrosion Of Chlorine Condenser By Electrochemical Method, Bin Xiang, Wen Chen, Wen-Zhang Huang, Shao-Hua Xing, Sheng-Tao Zhang
Study On The Corrosion Of Chlorine Condenser By Electrochemical Method, Bin Xiang, Wen Chen, Wen-Zhang Huang, Shao-Hua Xing, Sheng-Tao Zhang
Journal of Electrochemistry
Corrosion of condenser is very seriously in chlorine-alkali industry,which could lead to fatal disaster.The most commonly used material in low pressure condenser includes steel of 16MnR,10#,and welding rod of J507.Electrochemical analysis of the three materials in 29.9%(by mass) calcium chloride(CaCl2) solution was carried out.The corrosion current density icorr and impedance parameters of the three materials in 29.9% CaCl2 solution were estimated separately.The result showed that in the tripartite phase regions where the 10# seamless tube and 16MnR armor plate were jointed by welding,the weld was firstly eroded and suggested that the chlorine condenser should be examined and repaired every year.
Electrochemical Behavor Of Zinc-Indium Alloy Electrodes In Concentrated Alkaline Solution, Zhi-Lin Wang, Xiao-Ge Zhang, Rong-Gui Du, Chang-Jian Lin
Electrochemical Behavor Of Zinc-Indium Alloy Electrodes In Concentrated Alkaline Solution, Zhi-Lin Wang, Xiao-Ge Zhang, Rong-Gui Du, Chang-Jian Lin
Journal of Electrochemistry
The electrochemical behavior of zinc-indium alloy electrodes in 35%KOH solutions has been investigated by electrochemical methods including the potentiodynamic polarization and discharge measurements under constant current density.The results indicate that the anodic current density and passive current density increase after the indium addition.The discharge measurement shows that the addition of indium shortens the time to passive state for the Zn alloy compared to pure zinc at a large discharge conditions,that is the addition of indium may enhance the electrochemical activity of Zn alloy electrodes.It is found that the anodic dissolution of zinc-indium alloy electrodes in the concentrated KOH solution occurs …