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Effect of Sb dopant amount on the structure and electrocatalytic capability of Ti/Sb-SnO_2 electrodes in the oxidation of 4-chlorophenol

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Journal of Environmental Sciences 2007年第11期19卷 1380-1386页

作者： KONG Jiang-tao SHI Shao-yuan ZHU Xiu-ping NI Jin-ren Key Laboratory of Water and Sediment Sciences Ministry of Education of China Department of Environmental Engineering Peking University Beijing 100871 China State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing 100080 China

Ti/Sb-SnO2 anodes were prepared by thermal decomposition to examine the influence of the amount of Sb dopant on the structure and electrocatalytic capability of the electrodes in the oxidation of 4-chlorophenol. The physicochemical properties of the Sb-SnO2 coating were markedly influenced by different amounts of Sb dopant. The electrodes, which contained 5% Sb dopant in the coating, presented a much more homogenous surface and much smaller mud-cracks, compared with Ti/Sb-SnO2 electrodes containing 10% or 15% Sb dopant, which exibited larger mud cracks and pores on the surface. However, the main microstructure remained unchanged with the addition of the Sb dopant. No new crystal phase was observed by X-ray diffraction （XRD）. The electrochemical oxidation of 4-chlorophenol on the Ti/SnO2 electrode with 5% Sb dopant was inclined to electrochemical combustion; while for those containing more Sb dopant, intermediate species were accumulated. The electrodes with 5% Sb dopant showed the highest efficiency in the bulk electrolysis of 4-chlorophenol at a current density of 20 mA/cm^2 for 180 min; and the removal rates of 4-chlorophenol and COD were 51.0% and 48.9%, respectively.

关键词： 4-chlorophenol cyclic voltammogram electrochemical oxidation Sb dopant Ti/Sb-SnO2 electrode

Electrochemical Study of Hypophosphite

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International Journal of Minerals,Metallurgy and Materials 1998年第1期12卷 23-25页

作者： Yuguo Yang Dongbai Sun Dongbai Sun Dejun Yang (Materials Science and Engineering School, University of Science and Technology Beijing, Beijing 100083, China) Materials Science and Engineering School University of Science and Technology Beijing Beijing 100083 China

Electrochemical behavior of hypophosphite was studied with cyclic voltammogram in acidic solution(pH = 4.6) at 80℃. Two anodic peaks were observed on gold electrode at - 0.44V and - 0.59 V (SCE),respectively, and no corresponding cathodic peaks were obtained. The one at - 0.44 V wits ascribed to the oxidation oftautomeric form of hypophosphite, the other at - 0.59 V was due to the oxidation of absorbed form of hypophosphite. The two oxidation reactions were believed to be the electron source of nickel ion reduction in electrolessnickel processes.

关键词： cyclic voltammogram electroless nickel plating gold electrode hypophosphite

Synthesis, Characterization, Spectroscopic and Electro-chemical Properties of New Mono- and Binuclear Copper(I) Complexes with Substituted 2,2'-Bipyridine

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Chinese Journal of Chemistry 2004年第11期22卷 1283-1287页

作者：曹迁永甘欣傅文甫 Technical Institute of Physics and Chemistry Chinese Academy of Sciences College of Chemistry and Chemical Engineering Yunnan Normal University Kunming Yunnan 650092 China

The mono- and binuclear Cu(I) complexes with substituted 2,2'-bipyridine and iodide ligands, [CuL2]BF4 (L=4-methoxycarbonyl-6-(4-methylphenyl)-2,2'-bipyridine (a), 6-(4-hydroxymethylphenyl)-2,2'-bipyridine (b) and 6-(4-methoxylphenyl)-2,2'-bipyridine (c)) and [Cu2(-I)2L2] were prepared, and the crystal structures of the com-plexes were obtained from signal-crystal X-ray diffractional analysis. The spectroscopic properties of the complexes in dichloromethane are dominated by low energy MLCT bands from 360 to 650 nm. The electrochemical studies of mononuclear complexes reveal that the complexes have stable copper(I) state.

关键词： copper(I) complex substituted bipyridine crystal structure spectroscopy cyclic voltammogram

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DNA对聚苯胺电化学行为的影响

分析化学 2013年第12期41卷 1953-1954页

作者：魏仲航陈丽波姜涛吉林大学中日联谊医院

1引言导电聚合物具有特殊的分子结构及良好的导电性能。在聚苯胺、聚噻吩和聚吡咯三类导电聚合物中,聚苯胺由于其良好的环境稳定性、可控的导电性以及多样的氧化还原性而备受关注[1],被广泛用于纳米复合物的制备及应用等[2]。通常,聚苯... 详细信息

1引言导电聚合物具有特殊的分子结构及良好的导电性能。在聚苯胺、聚噻吩和聚吡咯三类导电聚合物中,聚苯胺由于其良好的环境稳定性、可控的导电性以及多样的氧化还原性而备受关注[1],被广泛用于纳米复合物的制备及应用等[2]。通常,聚苯胺需要pH<4的条件以保持其电化学活性,在一定程度上限制了其应用。一些功能化基团,如COOH,SO3H及BO2H2等,被引入到聚苯胺链中,"掺杂"的聚苯胺在较宽的pH范围内改善了其溶解性、氧化还原稳定性及电化学活性

关键词： Polyaniline Deoxyribonucleic acid cyclic voltammogram

Soft-Chemical Synthesis of Vanadium Oxide Nanostructures Using 3,3’,3”-Nitrilotripropionic Acid(NTP)as a Carrier

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Soft Nanoscience Letters 2011年第3期1卷 66-70页

作者： V.S.Reddy Channu Rudolf Holze B.Rambabu Institut für Chemie AG ElektrochemieTechnische Universitat ChemnitzChemnitzGermany Solid State Ionics and Surface Sciences Lab Department of PhysicsSouthern University and A&M CollegeBaton RougeUSA

Vanadium oxide nanostructures were synthesized using NTP as a carrier through soft-chemical method. The influence of calcination temperature on the phase and morphology of obtained pristine product were characterized using X-ray diffraction (XRD), thermal gravimetric analysis (TGA) and scanning electron microscopy (SEM). cyclic voltammogram studies were conducted to examine the electrochemical performance of cathodes made of vanadium oxide nanostructures. X-ray diffraction results show that, the particle size of the nanomaterials is increases with the increasing of calcination temperature.

关键词： Nanomaterials Soft-Chemical Method Morphology cyclic voltammogram

Synthesis and Electrochemical Behavior of Poly N, N′- Dithiobis(1,3- Phenylenediamine)

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Wuhan University Journal of Natural Sciences 2002年第4期7卷 470-472页

作者： Li Zao-ying Zhou Lei Deng Shi-ren Li Jin-xia Zhou Yun-hong College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 Hubei China

A novel organic disulfide, N, N′-dithiobis(3-nitroaniline)(1) was prepared by the reaction of 3-nitroaniline with sulfur monochloride in chloroform. Compound 1 was reduced by zinc powder to give N, N′-dithiobis(1,3-phenylenediamine) (2). Poly N, N′-dithiobis (1,3-phenylenediamine) (3) was prepared by electrochemical polymerization of compound 2 and its basic electrochemical behavior is discussed.

关键词： N,N′-dithiobis(3-nitroaniline) conducting polymer synthesis cyclic voltammogram

Influence of Y^(3+) on Structure and Electrochemical Property of LiMn_2O_4

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Journal of Rare Earths 2005年第4期23卷 469-469页

作者： Xu Chaqing Tian Yanwen Liu Liying Zhai Yuchun School of Materials and Metallurgy Northeastern University Shenyang 110004 China

Li1.02YxMn2-xO4（x = 0, 0. 005, 0.01, 0.02, 0.04, 0. 1） were prepared by solid state reaction method with raw materials Li2CO3, electrolytic MnO2 and Y2O3. Li1.02YxMn2-x O4 with different Y^3＋ contents have good crystal structure, Y^3＋ doping makes the lattice parameter and crystal volume small. cyclic vohammogram testing result shows that a small quantity of Y^3＋ doping has no influence on the Li^＋ deinsertion-insertion process, but Y^3＋ doping decreases the interacting force among Li^＋ , and then availably avoids the energy level splitting. The electrochemical property testing indicates that the initial discharge ca- pacity at x =0.02 is 117.2 mAh·g^-1 and remains 96.9% with 113.6 mAhg^-1 after 20 cycles, which explains that Y^3＋ doping effectively restricts Jahn-Teller effect and stabilizes the crystal structure. AC analysis shows that conductivity of the samples is clearly improved due to Y^3＋ doping.

关键词： lithium-ion battery Li1.02YxMn2-xO4, Y^3+ doping conductivity cyclic voltammogram rare earths