Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Discipline
- Keyword
-
- Cyclic voltammetry (74)
- Electrocatalysis (67)
- Electrodeposition (62)
- Electrochemistry (61)
- Lithium ion battery (59)
-
- Oxygen reduction reaction (52)
- Supercapacitor (44)
- Electrochemical performance (38)
- Cathode material (37)
- Corrosion (35)
- Lithium-ion battery (32)
- Lithium-ion batteries (31)
- Fuel cell (29)
- Electrochemical impedance spectroscopy (28)
- Lithium ion batteries (26)
- Modified electrode (24)
- Polyaniline (20)
- Anode (19)
- Anode materials (19)
- Carbon nanotubes (19)
- Cathode (19)
- EIS (19)
- Anode material (18)
- Cathode materials (18)
- Electrolyte (18)
- Li-ion battery (18)
- Electrochemical behavior (17)
- Electrocatalyst (16)
- Electrochemical oxidation (16)
- Fuel cells (16)
- Publication Year
Articles 1861 - 1890 of 2294
Full-Text Articles in Physical Sciences and Mathematics
Rhodium As A Ubiquitous Substrate For Surface Enhanced Raman Spectroscopy, Bin Ren, Xu Feng Lin, Zhong Qun Tian
Rhodium As A Ubiquitous Substrate For Surface Enhanced Raman Spectroscopy, Bin Ren, Xu Feng Lin, Zhong Qun Tian
Journal of Electrochemistry
Raman Spectroscopy is a powerful technique in characterizing the molecular structure at the molecular level. However, only after the discovery of surface enhanced Raman scattering (SERS) effect, has it become one of the most widely used technique in surface sciences. The limitation that only Ag, Au and Cu can produce prominent SERS signal of practical significance, greatly hinders the application of this technique. Recently our group has made great progress in extending SERS to pure transition metal surfaces, such as Pt, Ni, Fe, Co etc [1] . Rh, due to its special application as catalysts in the catalytic or electrochemical …
In Situ Raman Spectroelectrochemical Characterization Of The Prussian Blue/Platinum Modified Electrode, Xiao-Wei Cao, Rong Wang, Gui Hua Wang, Zong Rang Zhang
In Situ Raman Spectroelectrochemical Characterization Of The Prussian Blue/Platinum Modified Electrode, Xiao-Wei Cao, Rong Wang, Gui Hua Wang, Zong Rang Zhang
Journal of Electrochemistry
Prussian Blue is known to be deposited electrochemically on the electrode surface, producing a dense redox active layer. Since the Prussian Blue modified electrode was first reported by Neff in 1978 [1] , different in situ spectroelectrochemical techniques have been widely used to investigate its electrochemical mechanism [2～4] . But no research work related to the in situ Raman spectroscopic studies on it has been reported. In this paper we try to characterize the nature of thin Prussian Blue films on platinum substrates with in situ Raman spectroelectrochemical technique. A Super LABRAM confocal microscopic Raman spectrometer (Dilor) with a He?Ne …
Fabrications And Characterizations Of Porous Silicon By Two-Step Techniques Ii: Pulse Current Application, Xuan Cheng, Feng Ming Liu, Zuo Xin Wen, Chang Jian Lin, Zhong-Qun Tian, Ru Xue
Fabrications And Characterizations Of Porous Silicon By Two-Step Techniques Ii: Pulse Current Application, Xuan Cheng, Feng Ming Liu, Zuo Xin Wen, Chang Jian Lin, Zhong-Qun Tian, Ru Xue
Journal of Electrochemistry
Porous silicon structures were formed by two?step technique consisting of pulse current applications in 1∶1 hydrofluoric acid and ethanol solutions and chemical oxidation in 20% nitric acid solutions. Their surface morphologies and optical properties were characterized by scanning electron microscope (SEM) and Raman spectrometer, and compared with those obtained by constant current application. More uniform pore formation on p(100) silicon wafers was observed by pulse current application. Illumination with an ultraviolet lamp during the pulse current application accelerated the macropore formation, accordingly, the optical properties were changed.
The Charge Transfer Effect Of Sers Induced By The Electrochemical Hydrogen Evolution Reaction, Feng-Ming Liu, Qi Han, Yan Xia Chen, Qi Ling Zhong, Bin Ren, Zhong Qun Tian
The Charge Transfer Effect Of Sers Induced By The Electrochemical Hydrogen Evolution Reaction, Feng-Ming Liu, Qi Han, Yan Xia Chen, Qi Ling Zhong, Bin Ren, Zhong Qun Tian
Journal of Electrochemistry
As one of the important mechanisms of SERS, the charge transfer (CT) enhancement requires the strong interaction of the adsorbed species with the substrate in order to permit the transition of charge between the metal Fermi level (energy state) and the molecular orbital [1] . The high enhancement needs the match of the energy gap between the Fermi level (or surface state) and the orbital energy level of the adsorbed molecules with the energy of the incident light. The electrode Fermi level is usually adjusted by the applied potential to satisfy the CT resonance. For the electrochemical reaction process, the …
Surface-Enhanced Raman Spectroscopy Of Metallotetraphenyl Porphyrins Adsorbed On Ag_2o And Silver Colloids, Ying Hui Zhang, Dong Ming Chen, Tian Jing He, Fan-Chen Liu
Surface-Enhanced Raman Spectroscopy Of Metallotetraphenyl Porphyrins Adsorbed On Ag_2o And Silver Colloids, Ying Hui Zhang, Dong Ming Chen, Tian Jing He, Fan-Chen Liu
Journal of Electrochemistry
The biological significance of porphyrins and metalloporphyrins has stimulated intensive investigations on these compounds for many years. On the other hand, porphyrins and metalloporphyrins also have extensive applications in many other fields such as chemical modified electrodes, organic photovoltaic devices and biomimetic catalysis. The adsorption behavior and chemical reactions of metalloporphyrins on surfaces or interfaces are very important for these applications. Surface?enhanced Raman spectroscopy has been used to investigate the physical and chemical processes of the porphyrins on surfaces in many scientific publications. Surface?reactions such as metalization, demetalization, aggregation, electrochemical redox and N?protonation of the porphyrins on colloids, electrodes or …
The New Developments Of Molten Salt Electrochemistry, Qi-Qin Yang, Shu Zhen Duan
The New Developments Of Molten Salt Electrochemistry, Qi-Qin Yang, Shu Zhen Duan
Journal of Electrochemistry
New developments in the areas of molten salt systems, molten salt batteries and power, electrodeposition of metals and alloys, electro synthesis of compound materials in molten salts are presented. Application of molten electrochemistry to the energy supply and consumption,global environment, resources and recycling are predicted.
The Development Of Microsystems And New Applications Of Electrochemistry, Zhao Wu Tian, Hua-Shui Lin, Jian-Jun Sun, Yong-Liang Zhou, Yan-Bin Zu, Zhong-Qun Tian, Jin Luo, Zhong-Hua Lin, Zhao_Xiong Xie, Wei_Ling Hu, Yong_Gan Hu, Wen Duan Su
The Development Of Microsystems And New Applications Of Electrochemistry, Zhao Wu Tian, Hua-Shui Lin, Jian-Jun Sun, Yong-Liang Zhou, Yan-Bin Zu, Zhong-Qun Tian, Jin Luo, Zhong-Hua Lin, Zhao_Xiong Xie, Wei_Ling Hu, Yong_Gan Hu, Wen Duan Su
Journal of Electrochemistry
Brief introduction to microsystems 2 Discussions on the developments of microsystem technologies 3 Applications of electrochemistry in microsystem 3.1 Confined Etchant Layer Technique (CELT) for the complex 3D-pattern micromachining 3.2 Focusing Electrophoresis and the application of microsystem in (bio) chemistry (μTAS or Lab on A Chip) 3.3 Smart Electro-Osmosis pump——a reasonable choosing for microfluidic network 4 Concluding remark
Template Synthesis Of Nano-Structured Electrode Materials And Its Electrochemical Performance, Jian Zhao, Quan Yong Gao, Yong Yang, Zu-Geng Lin
Template Synthesis Of Nano-Structured Electrode Materials And Its Electrochemical Performance, Jian Zhao, Quan Yong Gao, Yong Yang, Zu-Geng Lin
Journal of Electrochemistry
In this letter, various nano structured materials such as spinel LiMn 2O 4 nanotubes/nanowires and carbon nanotubes have been prepared by using porous alumina template. The prepared template and materials have been characterized by AFM and TEM techniques. It is shown that size of the nanotubes can be conveniently controlled by using template method. Some preliminary results of cyclic voltammetry about nano structured LiMn 2O 4 are also reported.
A Study Of Monitoring Corrosion Of Metal Via An Optic Waveguide Sensing Method, Xue Ming Li, Wei Ming Chen, Shang Lian Huang, Na Zhang, Zong-Qing Huang
A Study Of Monitoring Corrosion Of Metal Via An Optic Waveguide Sensing Method, Xue Ming Li, Wei Ming Chen, Shang Lian Huang, Na Zhang, Zong-Qing Huang
Journal of Electrochemistry
An optical wave guide sensing method was proposed for monitoring corrosion of metal in outdoors steel structures. Replacing the cladding of wave guide with metal film in a particular location, the method takes the metal film as the corrosion sensitive film. The experiment of waveguide sensor was carried out on a 721 colorimetric vessel, with which the soution is held in itself and the light is propagated in its sidewall. A Fe C alloy film was electroplated onto the inner sied of vessel to form the corrosion sensitive film. The structure of the Fe C alloy film was studied by …
Forming And Mechanism Of Chitosan Coating On Aluminum Cathode By Electrophoresis, Xi Zhang, Shao Hui Wu, Ying Chu Tao
Forming And Mechanism Of Chitosan Coating On Aluminum Cathode By Electrophoresis, Xi Zhang, Shao Hui Wu, Ying Chu Tao
Journal of Electrochemistry
The electrophoretic deposition behavior and the corresponding coating mechanism were investigated. The influencing factors, such as cell potential, CS concentration, pH value of solution, temperature and supporting electrolytes, on coating were researched. The coating morphology was characterized by XRD and SEM. The mechanism of electrophoretic deposition in CS solution was discussed.
The Electrochemical Performance Of The Spinel Limn_2o_4, Shi Gang Lu, Yu Cheng Sun, Ren Min Liu, Wei-Hua Jin, Wen-Zhong Li, Cang Han
The Electrochemical Performance Of The Spinel Limn_2o_4, Shi Gang Lu, Yu Cheng Sun, Ren Min Liu, Wei-Hua Jin, Wen-Zhong Li, Cang Han
Journal of Electrochemistry
The cathode material spinel LiMn 2O 4 of lithium ion battery was synthesized by making use of solid state reaction at 750～850 ℃. The discharge capacity was 115～125 mAh g -1 . It was observed that the capacity loss increase at the elvated 55 ℃ temperature. A little excess Li content and the Co doped spined could improved the cycle capability of the cathode material. The dissolution of the spined in the electrolyte was measured. The treatment method was used to stabilize the LiMn 2O 4 structure. It was found that the spinel LiMn 2O 4, treated with layer compound …
The Study Of Pretreatment For The Determination Of The Conventional Anion In Sea Water By Ic——The Method Of Electrolysing Argentine Electrode, Lei Guo, Wei Yang, Rong Zong Hu
The Study Of Pretreatment For The Determination Of The Conventional Anion In Sea Water By Ic——The Method Of Electrolysing Argentine Electrode, Lei Guo, Wei Yang, Rong Zong Hu
Journal of Electrochemistry
The method of pretreatment to determine trace amounts of Br ,NO 3 and SO 4 2 in sea water by ion chromatography was proposed, by which the electrolysing argentine electrode was used to minimize the disturbance of Cl -. The results indicate that the method is simple, convenient, quick and efficient with recovery rates over 95 percent.
Study On Electrodeposition Of Ingaas Thin Film, Yu Chun Li, Xi Lian Wang, Jing Ke Han, Ai-Zhen Han, Yuan-Kai Gao, Zhi-Wei Yang
Study On Electrodeposition Of Ingaas Thin Film, Yu Chun Li, Xi Lian Wang, Jing Ke Han, Ai-Zhen Han, Yuan-Kai Gao, Zhi-Wei Yang
Journal of Electrochemistry
The principle and the experimental method of the electrodeposition are discribed in detail in this paper.InGaAs thin film was prepared by using optimized electrodeposited conditions. The radiative wave length of the film was between 1.3～1.5 μm, the composition of the film was analyzed by energy spectrometer and the transmission spectrum of the film was measured by spectrophotometer and monochromator. The V I chractristic of the conductive type and the topography of the In x Ga 1 x As film were also studied.
The Development Of Carbon Monoxide Tolerant Catalysts For Proton-Exchange Membrane Fuel Cell, Zhong Jun Hou, Hong Mei Yu, Bao Lian Yi, Ming Han
The Development Of Carbon Monoxide Tolerant Catalysts For Proton-Exchange Membrane Fuel Cell, Zhong Jun Hou, Hong Mei Yu, Bao Lian Yi, Ming Han
Journal of Electrochemistry
High over potential of proton exchange membrane fuel cell(PEMFC) anode caused by carbon monnoxide poisoning when reformate or methanol is used as fuel is main obstacle to the high performance of PEMFCs.Using carbon monoxide tolerant catalysts is the most hopeful way to solve the CO problem.The CO poisoning problem is reviewed briefly in this paper,and the development of CO tolerant catalysts is introduced in details, including electrocatalysts activity, preparation method and mechanism of tolerance to CO.Mo and W can improve catalysts' CO tolerance.Multi component catalysts are expected to be more tolerant to CO.
Studies Of Adsorption And Oxidation Of Ethanol On Nm-Pt/Gc Electrode——I.Cyclic Voltammograms And In-Situ Ftir Spectroscopy In Alkaline Media, Guo-Lian Chen, Shi-Gang Sun, Sheng-Pei Chen, Zhi-You Zhou
Studies Of Adsorption And Oxidation Of Ethanol On Nm-Pt/Gc Electrode——I.Cyclic Voltammograms And In-Situ Ftir Spectroscopy In Alkaline Media, Guo-Lian Chen, Shi-Gang Sun, Sheng-Pei Chen, Zhi-You Zhou
Journal of Electrochemistry
The electro_oxidation of ethanol on nm_Pt/GC electrode in alkaline solutions containing 0.02 mol·L -1 NaOH+0.1 mol·L -1 CH 3CH 2OH was investigated by using cyclic voltammetry and in_situ FTIR spectroscopy. The experimental results demonstrated that the main product of ethanol oxidation is CH 3COO -,only very small amount of CH 3CHO has been determined simultaneously. In contrast with the dual path reaction mechanism for the oxidation of ethanol in acid media,the oxidation of ethanol in alkaline media didn't pass through the dissociative adsorption,and no adsorbed species could be determined even using a nm_Pt/GC electrode that gives rise to enhancement of …
Studies Of Electrochemical Impedance Spectroscopy On Coated Steel With Artificial Defect, Zhi Gang Zhang, Zhi Jun Gu, Yong Gui Liao, Qi-Long Guo, Fang-Teng Su, Yan-Zhen Chen
Studies Of Electrochemical Impedance Spectroscopy On Coated Steel With Artificial Defect, Zhi Gang Zhang, Zhi Jun Gu, Yong Gui Liao, Qi-Long Guo, Fang-Teng Su, Yan-Zhen Chen
Journal of Electrochemistry
Electrochemical Impedance Spectroscopy (EIS) was applied to rapidly evaluate the performance of organic coatings and the characterization of the protective properties of anticorrosive pigments in the presence of artificial defect in organic coatings. The results showed that artificial defect method can rapidly evaluate the performance of coatings and discriminate whether the pigments in the coatings have inhibitive.
Investigation Of A Complex Lithium Cobalt Nickel Oxide As Lithium Ion Battery Cathode Materials Prepared By A New Citrate Sol-Gel Method, Jing-Li Han, Qing Guo Liu
Investigation Of A Complex Lithium Cobalt Nickel Oxide As Lithium Ion Battery Cathode Materials Prepared By A New Citrate Sol-Gel Method, Jing-Li Han, Qing Guo Liu
Journal of Electrochemistry
The synthesis and electrochemical characteristics of lithium cobalt nickel oxide as cathode materials for rechargeable lithium batteries were investigated. It was clarified from these investigations that lithium cobalt nickel oxide has been produced from basic cobalt carbonate,basic nickel carbonate, lithium carbonate, and citrate. LiNi 0.8 Co 0.2 O 2 prepared under the stream of oxygen gas showed a higher cycling capacity of (～190 mAhg 1 ).
Electrochemical Hydrogen Storage Properties Of Carbon Nanotubes, Xue Qin, Xue Ping Gao, Feng Wu, Hong Liu, Ying Lan, Hua-Tang Yuan, De Ying Song, Pan Wen Shen
Electrochemical Hydrogen Storage Properties Of Carbon Nanotubes, Xue Qin, Xue Ping Gao, Feng Wu, Hong Liu, Ying Lan, Hua-Tang Yuan, De Ying Song, Pan Wen Shen
Journal of Electrochemistry
The electrochemical properties of carbon nanotubes (CNTs) electrode have been investigated in this paper. The high discharge capacity of 200 mAh·g 1 was measured for the CNTs Ni electrode at a discharge density of 200 mA·g 1 . CNTs Ni electrode, the high electrochemical activity and the long cycle life were observed. The electrochemical mechanism of hydrogen adsorption and oxidation at the CNTs Ni electrode was studied by cyclic voltammertry method.
The Difference Of The Geometrical Thickness And The Electrochemical Apparent Effective Thickness Of Self-Assembled Monolayers, Xiao Cui, Li Li
The Difference Of The Geometrical Thickness And The Electrochemical Apparent Effective Thickness Of Self-Assembled Monolayers, Xiao Cui, Li Li
Journal of Electrochemistry
The geometrical thickness, which was obtained from the capacitance of membrane, can be used to characterize the existence of membrane. The apparent effective thickness, which is analyzed from the electron transfer constant of transmembrane, can be used to determine the degree of “collapsed" of molecules. Though the two thicknesses were different in value, there was no contradiction. The influence on the geometrical thickness is little, but the effect to the apparent effective thickness is great from the small “collapsed" area in the membrane from the given calculation.
Electrochemical Polymerization Of Biphenyl And P-Terphenyl In Organic Solvent, Sheng Cui, Yun Yun
Electrochemical Polymerization Of Biphenyl And P-Terphenyl In Organic Solvent, Sheng Cui, Yun Yun
Journal of Electrochemistry
Polymers were prepared by oxidation of biphenyl and p terphenyl by consecutive cyclic voltammetry and at a constant potential in rigorously dried dichloromethane solutions. In situ studies on the polymerization properties and deposited polymer were also proceeded employing electrochemical quartz crystal micro balance, spectroelectrochemical measurements. The great mass deposition was observed as the biphenyl and p terphenyl monomers are oxidized indicating that polymers were formed by the oxidation of biphenyl and p terphenyl in the solution and then deposited on the platinum electrode surfaces. Polymerization can be further confirmed by the red shifts of spectra observed by spectroelectrochemical measurements. The …
Fabrications And Characterizations Of Porous Silicon By Tow-Step Techniques I:Constant Current Application, Xuan Cheng, Feng Ming Liu, Chang Jian Lin, Zuo-Xin Wen, Zhong-Qun Tian, Ru Xue
Fabrications And Characterizations Of Porous Silicon By Tow-Step Techniques I:Constant Current Application, Xuan Cheng, Feng Ming Liu, Chang Jian Lin, Zuo-Xin Wen, Zhong-Qun Tian, Ru Xue
Journal of Electrochemistry
Porous silicon structures were formed by a two step technique consisting of electrochemical polarization and chemical oxidation processes in 1∶1 hydrofluoric acid and ethanol solutions. A constant current density of 0.03 A/cm 2 was applied to p type silicon wafers, followed by chemical treatment in 20% nitric acid solutions. These samples were then carefully examined by scanning electron microscope (SEM) and Raman spectrometer to study their surface morphologies and optical properties. After a year storage in a desiccator, the aged porous silicon samples were re examined by SEM and Raman spectrometer before and after treated with styrene and decene(1) organic …
A Study Of The Adsorption Behaviors On The Surface Of Gold Electrode By In-Situ Electrochemical Raman Spectroscopy, Xia Qin Wu, Xiao Wei Cao, Zhe Su Wang, Xiao-Yun Meng, Zong-Rang Zhang
A Study Of The Adsorption Behaviors On The Surface Of Gold Electrode By In-Situ Electrochemical Raman Spectroscopy, Xia Qin Wu, Xiao Wei Cao, Zhe Su Wang, Xiao-Yun Meng, Zong-Rang Zhang
Journal of Electrochemistry
The results of in situ measurements with Raman spectroelectrochemical thchnique on bare gold electrode and adenine modified gold electrode were reported. The adsorption behaviors of adenine and superoxide dismutase(SOD) and their interactions with gold electrode were analyed. The mechanism of promoted electron transfer process of SOD in the presence of adenine at gold electrode surface is discussed.
The Memory Effect Of Mh-Ni Battery, De Ming Xie, Jian Ming Wang, Jian Qing Zhang, Chu-Nan Cao
The Memory Effect Of Mh-Ni Battery, De Ming Xie, Jian Ming Wang, Jian Qing Zhang, Chu-Nan Cao
Journal of Electrochemistry
The memory effect of MH Ni battery was investigated. The depth of discharge, discharge rate and cycle number influence the memory effect greatly. A few completely full charge/discharge cycles could eliminate it. The existence of the memory effect had nothing to do with zinc element. During the course of life cycling at low DOD (degree of discharge),the smaller the discharge current was, the lower was the maximum charge voltage. In addition, discharge voltage and discharge capacity drop fast at the beginning, gradually leveled off at about a value. If the discharge current was increased, the discharge capacity was obviously less …
Effect Of High Concentration Lithium Bromide Solution On Electrochemical Behavior Of Low Alloy Steel At High Temperature, Jian-Wei Guo, Cheng Hao Liang
Effect Of High Concentration Lithium Bromide Solution On Electrochemical Behavior Of Low Alloy Steel At High Temperature, Jian-Wei Guo, Cheng Hao Liang
Journal of Electrochemistry
By electrochemical measurements and weight loss experiments, the effect of MoO 4 2- on low alloy steel's electrochemical behaviors was investigated at high temperature in 55%LiBr+0.07 mol/L LiOH solution. The results showed that MoO 4 2- ,as an anodic inhibitor, formed passive film rapidly and impeded both anodic and cathodic procedures. Moreover, Na 2MoO 4 prevented corrosion effectively in 55%LiBr+0.07 mol/L LiOH solution when its concentration is more than 200 mg/L. The pitting potential increased accompanying to the arising of Na 2MoO 4 concentration.Some elements of alloy strengthened resistance to corrosion, shch as chromium and nickel, but aluminum promoted corrosion. …
Electrochemical Investigations Of Semiconductor Silicon Wafers, Xuan Cheng, Chang Jian Lin
Electrochemical Investigations Of Semiconductor Silicon Wafers, Xuan Cheng, Chang Jian Lin
Journal of Electrochemistry
Electrochemical characteristics of semiconductor silicon wafers were investigated in dilute hydrofluoric acid solutions using DC polarization and AC impedance techniques under both illuminated and dark conditions. Both techniques were extremely sensitive to the trace amount (10 -9 wt% level) of copper presented in solutions, but only sensitive to the 10 -6 wt% level of non ionic surfactant OHS contained in solutions. The results revealed that the electrochemical reactions took place favorably and became predominated at silicon/solution interface under illuminated condition.
Mechanisimic Study Of Fes Electrode Process, Cong-Sheng Guan, Shu-Zhen Duan
Mechanisimic Study Of Fes Electrode Process, Cong-Sheng Guan, Shu-Zhen Duan
Journal of Electrochemistry
The mechanism of FeS electrode process has been investigated by using linear cyclic voltammetry. The electrode porcess of FeS is accompanied with the formation and dissolution of insoluble FeS and controlled by ohmic resistance. The peak currents and potentials on the cyclic voltammograms are dependent lineally on the square root of the scan rates. According to this, an ohmic resistance controlling model of FeS electrode has been put forward, and the relative functions between peak currents or potentials and scan rates have been deduced. The theoretical deduction is corresponding to the results of the experiments.
The Effect Of Anode Thickness In Sofcs With Anode Supported Ysz Film, Yi Huang Zhang, Yi Jiang, Zi Gui Lu, Yong-Lai Dong, Jing-Wang Yan
The Effect Of Anode Thickness In Sofcs With Anode Supported Ysz Film, Yi Huang Zhang, Yi Jiang, Zi Gui Lu, Yong-Lai Dong, Jing-Wang Yan
Journal of Electrochemistry
Solid oxide fuel cells with supported yttria stabilized zirconia electrolyte films on anode substrates of various thickness have been fabricated. The electrochemical performances of the SOFCs have been examined. The results showed that the cell performance was limited by the anodic overpotential, which is caused mainly by a concentration polarization when the anode substrate is thick. The anodic overpotential was reduced obviously as the thickness of anode substrate was decreased. As a result, the performance of the SOFC cell was improved. With a 0.5 mm anode substrate, a SOFC cell produced a power density about 0.19 W/cm 2 at 800 …
The Lineal Polarization Method For Corrosion Rate Measurement Of Reinforcing Bar Of Concrete In Situ, Ai-Ling Du, Wen-Tao Hou, He-Ming Zhang, Jian-Qun Luo
The Lineal Polarization Method For Corrosion Rate Measurement Of Reinforcing Bar Of Concrete In Situ, Ai-Ling Du, Wen-Tao Hou, He-Ming Zhang, Jian-Qun Luo
Journal of Electrochemistry
A linear polarization method was applied to measure corrosion rate of reinforcing bar of concrete in situ. Generally in the experiment, the area and shape of the reinforcing bar as a working electrode can be changed and adjusted according to our needs. But polarization area cannot be defined when reinforcing bar is polarized in situ, so that a real R p can't be obtained. Thus the purpose of present work is to improve the measurement system. We used the double_ring auxiliary electrodes made by ourselves. The size of the double_ring auxiliary electrodes was adjusted repeatedly until the real polarization area …
The Electrochemical Polymerization Of Erythrosin And The Fluorescence Spectra Of Polyerythrosin, Hong Ping Zhu, Shao Lin Mu
The Electrochemical Polymerization Of Erythrosin And The Fluorescence Spectra Of Polyerythrosin, Hong Ping Zhu, Shao Lin Mu
Journal of Electrochemistry
The solution used for the electrolysis consisted of 0.03 mol·dm -3 erythrosin, 0.05 mol·dm -3 sodium tetraborate and 0.5 mol·dm -3 KCl with pH 8.50. Polyerythrosin film with red color has been electrochemically synthesized using repeated potential cycling between -0.20 and 1.10 V (vs.SCE). The film growth and the electrochemical property of polyerythrosin are affected by electrolytic conditions. Two main absorption peaks of polyerythrosin at 326 nm and 370 nm appear in the UV visible spectrum, which are different from that of the monomer. Polyerythrosin in dimethyl sulfoxide or dimethylformamide has a strong fluorescence intensity and the fluorescence intensity of …
Electrochemical Evaluation On The Porosity Of Electroless Ni-P Alloy Coatings, Hong-Ying Yu, Dong-Bai Sun, Jing-Bing Huang, De-Jun Yang
Electrochemical Evaluation On The Porosity Of Electroless Ni-P Alloy Coatings, Hong-Ying Yu, Dong-Bai Sun, Jing-Bing Huang, De-Jun Yang
Journal of Electrochemistry
By investigating the polarization curves of pure Ni P alloy,Ni P alloy coation and carbon steel in nitric acids with different concentrations,the sutable concentration of nitric acid for the evaluation of the porosity of Ni P alloy coatings has been determined and the coatings with different thickness have been evaluated.The results indicated that the nitric acid with 10 wt% concentration is the most suitable solution for the porosity of the coating by using electrochemical method.The polarization curve of Ni P alloy coating in 10% nitric acid can accurately reveal the porosity.With the decrease of the porosity of the coating,the corrosion …