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Articles 61 - 73 of 73
Full-Text Articles in Chemistry
Deposition And Characterization Of Electroless Nickel-Phosphorus-Boron Coatings From Acidic Bath, Tai-Xiang Jiang, Hui-Huang Wu
Deposition And Characterization Of Electroless Nickel-Phosphorus-Boron Coatings From Acidic Bath, Tai-Xiang Jiang, Hui-Huang Wu
Journal of Electrochemistry
Acknowledgments The authors gratefully acknowledge Professor B.W.Mao for use of AFM facilities at her laboratory. We would also like to thank J.Tang for assistance with AFM measurements.
Microsystem And Electrochemistry, Zhong_Qun Tian, Jian-Jun Sun
Microsystem And Electrochemistry, Zhong_Qun Tian, Jian-Jun Sun
Journal of Electrochemistry
Microsystem or micro electromechanical system (MEMS) is briefly introduced. The electrochemical applications in microsystem are reviewed and prospective applications of microsystem in electrochemistry are discussed. Along with the rapid development of micro_ analytical chemical systems or lab_on_chips in 21st century, electrochemistry may play an increasingly important role in microsystem technology.
Inhibition Of N,N'-O-Phenylen-Bis(3-Methoxysalicylidenimine) On Copper In Halide Solutions, Hou-Yi Ma, Shen-Hao Chen, Zhen-Lan Quan, Lin Niu, Shu-Lan Li
Inhibition Of N,N'-O-Phenylen-Bis(3-Methoxysalicylidenimine) On Copper In Halide Solutions, Hou-Yi Ma, Shen-Hao Chen, Zhen-Lan Quan, Lin Niu, Shu-Lan Li
Journal of Electrochemistry
Inhibition of N,N'_o_phenylen_bis(3_methoxysalicylidenimine)(V_o_Ph_V)on corrosion and anodic disslution of copper in neutral NaCl and NaBr solutions was investigated in terms of potentiostatic steady_state polarization and A.C. impedance techniques.The inhibition mechanism of V_o_Ph_V to copper corrosion was interpreted in detail by comparing the electrochemical behaviors of copper in halide solutions with or without V_o_Ph_V. Besides,the inhibition effect of self_assembled V_o_Ph_V film on copper corrosion in NaCl was also studied.
Study On Preparation Of Coarse And Fine Γ-Lialo_2 Mixed Powder Used For Mcfc Matrix, Hua-Xin Lin, Bao-Lian Yi, Lian-Ying Kong, En-Jun Zhang, Li Zhou, Feng-Xia Wang
Study On Preparation Of Coarse And Fine Γ-Lialo_2 Mixed Powder Used For Mcfc Matrix, Hua-Xin Lin, Bao-Lian Yi, Lian-Ying Kong, En-Jun Zhang, Li Zhou, Feng-Xia Wang
Journal of Electrochemistry
Coarse α_LiALO 2 powder was transferred completely to γ_LiAlO 2 at 900 ℃ for ten hours.Fine γ_LiAlO 2 powder was prepared by “chloride” synthesis. MCFC matrix was fabricated by mixing the coarse and fine γ_LiAlO 2 powder and by tape cast.The out'put voltage of the cell assembled with the matrix was 0.85 and 0.75 V respectively at 200 and 300 mA/cm 2,and power density was about 250 mW/cm 2.The performance of the matrix fabricated with the mixed powder was obviously more advanced than that of the matrix fabricated with only coarse γ_LiAlO 2 powder.
Electrochemical Characterization Of Ir-Ta-Ti Metal Oxide Coated Titanium Anodes, Ting-Yong Wang, Li-Kun Xu, Guang-Zhang Chen
Electrochemical Characterization Of Ir-Ta-Ti Metal Oxide Coated Titanium Anodes, Ting-Yong Wang, Li-Kun Xu, Guang-Zhang Chen
Journal of Electrochemistry
Ir_Ta_Ti metal oxide coated titanium anodes of variable composition were prepared by thermal decomposition. Their micro morphorogies and electrochemical properties were characterized by scanning electron microscope, open circuit potential, cyclic voltammetry, consumption rate measurements and accelerated life test. The SEM results indicated that all coatings were of a porous and cracked_mud microstructure influenced greatly by the composition of coatings. The electrochemical measurements showed that the Ir_Ta_Ti ternary oxide_coated anodes exhibited excellent electrochemical activity and electrochemical stability in both acidic media and seawater which were affected by the composition and microstructure of the coatings. Owing to good corrosion resistance and low …
An Eis Study On The Synergetic Filming Between Cathodic Protection And The Corrosion Inhibitor, Yong-Tao Zhao, Jian-Hua Wu, Jian-Hua Qian, Hui Yu
An Eis Study On The Synergetic Filming Between Cathodic Protection And The Corrosion Inhibitor, Yong-Tao Zhao, Jian-Hua Wu, Jian-Hua Qian, Hui Yu
Journal of Electrochemistry
The electrochemical impedance spectroscope(EIS) of 907A steel in seawater was investigated to study the film formation and destruction. The corrosion protection mechanism of the synergy interaction between cathodic protection and YKI_5 corrosion inhibitor(a mixture of polyhydric alcohol phosphate ester, phosphate and polyphosphate) is discused. Typical EIS spectral changes were clearly observed during the film formation and destruction processes. EIS results indicated that the film seemed to formed a multi_layered structure which consist of an inner layer(this may be an inhibitor_metal complex layer) and many outer layers of calcareous deposits. The film possesses of good persistency under the testing conditions.
Electro-Oxidation Of Glyoxal To Glyoxalic Acid, Yin-Sheng Chen, Xin-Sheng Zhang, Jun Hu, Ying-Chun Dai
Electro-Oxidation Of Glyoxal To Glyoxalic Acid, Yin-Sheng Chen, Xin-Sheng Zhang, Jun Hu, Ying-Chun Dai
Journal of Electrochemistry
An investigation has been made to obtain the glyoxalic acid by the electrochemical oxidation of glyoxal solution with hydrochloric acid under various experimental conditions.The cell used consists of a lead cathode, a DSA anode and a cation_exchange membrane of model CM001.The current efficiency and yield for glyoxalic acid generation were 80.0% and 91.1% respectively, under optimal operating conditions: velocity of electrolyte flow 1.4 m·s -1 ,current density 450A·m -2 ,temperature 30~40 ℃,initial concentration of glyoxal and hydrochloric acid 9.1%~16.0%, 4%~6%, respectively.
Investigations Of Lithium Ion Battery Electrolyte Solution, Jing-Li Han, Qing-Guo Liu
Investigations Of Lithium Ion Battery Electrolyte Solution, Jing-Li Han, Qing-Guo Liu
Journal of Electrochemistry
Synthesis and electrochemical investigations of {LiB[(SO 3)C 6H 3(O)(COO)]OC 6H 5}in EC/DMC or DMSO/PC mixtures are presented.
Studies Of Abnormal Infrared Effects Of Nanometer Thin Films Of Transition Metals And Alloys In Acid Solutions, Shi-Gang Sun, Ming-Sen Zheng, Guo-Qiang Lu, Li-Rong Cai, Sheng-Pei Cehn, Xiao-Yin Xiao
Studies Of Abnormal Infrared Effects Of Nanometer Thin Films Of Transition Metals And Alloys In Acid Solutions, Shi-Gang Sun, Ming-Sen Zheng, Guo-Qiang Lu, Li-Rong Cai, Sheng-Pei Cehn, Xiao-Yin Xiao
Journal of Electrochemistry
The adsorption of CO on electrodes of nanometer thin films of transition metals (Pt, Pd, Rh, Ru) and alloys (PtPd, PtRu) prepared under cyclic voltammetric conditions has been studied by in situ FTIR spectroscopy. The abnormal infrared effects (AIREs) have been explored as a novel and general phenomenon. The AIREs consist mainly in the inversion of the direction of IR band and the significant enhancement of IR absorption by adsorbed CO species. It was revealed that the enhanced IR absoroption of adsorbed species in AIREs depends strongly on the nature of metal or alloy, and on the structure and the …
Sprayed And Thermally Evaporated Carbon Films As Anodes For Lithium Ion Batteries, Shu-Gao Zhang, M.Schleich Donald
Sprayed And Thermally Evaporated Carbon Films As Anodes For Lithium Ion Batteries, Shu-Gao Zhang, M.Schleich Donald
Journal of Electrochemistry
Carbon films were made using spray_thermal evaporation from a kind of pyrolytic carbon powder. The films obtained with graphite structure were both potentio_statically and galvanostaically tested. Cycling patterns indicated a reduction peak on the first cycle corresponding to the formation of solid electrolyte interface, and the capacity values and x values were quite acceptable compared to theoretical ones when charging_discharging current density was suitable. Based on the experimental results, the obtained carbon films could be used as anode materials for relatively determining the electrochemical performances of cathode materials.
Study On Oxygenation Of Histidion-Cobalt And Monoiodohistidine-Cobalt Complexes By Cyclic Voltammtry, Yi Zhang, Ji-De Wang, Fan Yue, Xiao-Gang Zhang, Qi-Jun Song
Study On Oxygenation Of Histidion-Cobalt And Monoiodohistidine-Cobalt Complexes By Cyclic Voltammtry, Yi Zhang, Ji-De Wang, Fan Yue, Xiao-Gang Zhang, Qi-Jun Song
Journal of Electrochemistry
The oxygenation of Histidine_Co and Monoiodohistidine_Co complexes were studied by cyclic valtammtry under certain conditions,The possibility of studing the oxygenation processes by cyclic voltammetry method was proposed and discussed in comparison with the results of potentiometry and spectrophotometry.
Studies On Electrochemical Synthesis Of 4,5-Disubstituted-1,2- Benzoquinones And The Reaction Mechanism, Xian-Zhang Bu, Gui-Wu Xiao, Lin Ma, Xing-Chum He, Ling-Quan Gu
Studies On Electrochemical Synthesis Of 4,5-Disubstituted-1,2- Benzoquinones And The Reaction Mechanism, Xian-Zhang Bu, Gui-Wu Xiao, Lin Ma, Xing-Chum He, Ling-Quan Gu
Journal of Electrochemistry
The oxidation peak potentials( E p) of alinine derivates and catechol in 0.1 mol/L KCl+15% alcohol solution were measured by cyclic voltammograms technique. The electrochemical oxidation condition was set according to the E p. Three derivates of 4,5_disubstituted _1,2_benzoquinones were prepared via electrochemical oxidation_Michael addition reaction. The possible mechanism of electrochemical oxidation_Michael addition reaction is presented.
In-Situ Simultaneous Esr And Conductivity Measurements For Polyaniline, Lin Zhuang, Qing Zhou, Jun-Tao Lu
In-Situ Simultaneous Esr And Conductivity Measurements For Polyaniline, Lin Zhuang, Qing Zhou, Jun-Tao Lu
Journal of Electrochemistry
With a new cell design, simultaneous electrochemical ESR and conductance measurements were realized for the first time. The in_situ cell consisted of a dual working electrode, a counter electrode and a reference electrode accommodated in a capillary of 1mm diameter. The dual working electrode was composed of two closely spaced Pt electrodes: a Pt disk electrode(0.5 mm diameter)sealed in a thin glass tube and a Pt layer deposited on the outside wall of the glass tube.The two working electrodes were separated by the glass gap about 20 μm thick. Two potentiostats were used to control electrode potential and maintain 10 …