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ELECTROCHEMICAL COPOLYMERIZATION OF ANILINE AND AZURE B

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Chinese Journal of Polymer Science 2001年第5期19卷 483-492页

作者： Dan Shan Shao-lin Mu Bing-wei Mao Yong-fang Li department of {1. School of Science, Yangzhou {2. Yangzhou 2.5002. china state key laboratory of physical {1. of solid Surface, xiamen university xiamen 361.05 china Center for Molecular Science. Institute of {1. Chinese Academy of Sciences, Beijing 100080 china Yangzhou Univ Sch Sci Dept Chem Yangzhou 225002 Peoples R China xiamen Univ State Key Lab Phys Chem Solid Surface Xiamen 361005 Peoples R China Chinese Acad Sci Inst Chem Ctr Mol Sci Beijing 100080 Peoples R China

The electrochemical copolymerization of aniline and N,N,N'-trimethylthionin (azure B) in aqueous solutions has been carried out using the potential sweep method. The optimum conditions for the coelectrodeposition are that the pH value and the temperature of the electrolytic solution are controlled at 5.57 and 30 degreesC, respectively, and the scan potential range is set between -0.2. and 1.1. V (versus SCE). The copolymerization rate of aniline and azure B is about 3 times larger than that of aniline in the absence of azure B. The copolymerization of aniline and azure B was verified from the results of visible spectra during electrolysis, FTIR spectra and the atomic force microscopy (AFM) images of the polymers. The in situ visible spectrum for the electrolysis of the solution containing aniline and azure B is different from that of the respective aniline and azure B. The FTIR spectrum of the copolymer is not a superposition of that of polyaniline and poly(azure B). The AFM image of the copolymer is different from those of polyaniline and poly(azure B) and is not a mixture of individual polymers. The conductivity of the copolymer synthesized at pH 5.57 is four orders of magnitude higher than that of polyaniline synthesized under the same conditions, but in the absence of azure B. The electrochemical properties of the copolymer are mainly attributed to polyaniline, but the copolymer has a better electrochemical reversibility and a much faster charge transfer than those of polyaniline.

关键词： aniline azure B electrochemical copolymerization characterization of copolymer electrochemical property

SERS CHARACTERIZATION OF ADSORBED WATER AT VERY NEGATIVE POTENTIALS

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Chinese Chemical Letters 1993年第7期4卷 625-626页

作者： Zhong Qun TIAN Bing Wei MAO state {1.{2. for physical chemistry of the solid Surface, department of chemistry, xiamen university, xiamen 361.05

Surface enhanced Raman scattering of water adsorbed at silver electrodes in very negative potential region was first observed and a simple model related to the adsorption configuration is proposed.

关键词： SERS CHARACTERIZATION OF ADSORBED WATER AT VERY NEGATIVE POTENTIALS very SCE mode AT

CLUSTER SIMULATIONS:THEORETICAL STUDIES OF NiO AND CO CHEMISORPTION

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Journal of Energy chemistry 1995年第4期 353-364页

作者： XU Xin LU Xin WANG Nan-Qin ZHANG Qian-Erstate key {1. of physical chemistry on solid surfaces department of chemistry, xiamen university xiamen, Fujian {1.}

The bonding of CO to the NiO(1.0)surtace has been investigated by means of DV-Xa method Emphasis is on how to get a realistic description of the NiO bulk as well as the bonding mechanism in *** calcuation results demonstrate that it is very important to maintain the charge consistency so as to reproduce the experimental results of bulk NiO with an embedded cluster model When compared with the bonding mechanism of CO in a surface electric field,the embedded cluster calculations with BSSE correction show that the interaction between CO and NiO(1.0)is mainly electrostatic.

关键词： CO/NiO chemisorption cluster model charge consistency

LiCoO_2.electrode/electrolyte interface of Li-ion batteries investigated by electrochemical impedance spectroscopy

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Science china{1. 2007年第6期50卷 776-783页

作者： ZHUANG QuanChao1, 2, XU JinMei1, FAN XiaoYong1, WEI GuoZhen1, DONG QuanFeng1 JIANG YanXia1, HUANG Ling1 & SUN Shigang1 1 state key Lab of {1. chemistry of solid surfaces, department of chemistry, xiamen university, xiamen 361.05, china 2 School of Materials Science and Engineering, china {1.} of Mining & Technology, Xuzhou 221116, china state {1. Lab of{2. chemistry of solid surfaces Department of ChemistryXiamen UniversityXiamen 361005China School of Materials Science and Engineering China University of Mining and TechnologyXuzhou 221116China

The storage behavior and the first delithiation of LiCoO2.electrode in 1.mol/L LiPF6-EC:DMC:DEC elec- trolyte were investigated by electrochemical impedance spectroscopy (EIS). It has found that, along with the increase of storage time, the thickness of SEI film increases, and some organic carbonate lithium compounds are formed due to spontaneous reactions occurring between the LiCoO2.electrode and the electrolyte. When electrode potential is changed from 3.8 to 3.95 V, the reversible breakdown of the resistive SEI film occurs, which is attributed to the reversible dissolution of the SEI film component. With the increase of electrode potential, the thickness of SEI film increases rapidly above 4.2.V, due to overcharge reactions. The inductive loop observed in impedance spectra of the LiCoO2.electrode in Li/LiCoO2.cells is attributed to the formation of a Li1.xCoO2.LiCoO2.concentration cell. Moreover, it has been demonstrated that the lithium-ion insertion-deinsertion in LiCoO2.hosts can be well described by both Langmuir and Frumkin insertion isotherms, and the symmetry factor of charge transfer has been evaluated at 0.5.

关键词： Li-ion batteries, LiCoO2. EIS, SEI film, inductance

Adsorption and reduction of palladium (Pd^(2.)) by Bacillus licheniformis R08

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Chinese Science Bulletin 2002年第15期47卷 1262-1266页

作者： LIN Zhongyu, ZHOU Chaohui, WU Jianming, CHENG Hu, LIU Bilan, Nl Zimian, ZHOU Jianzhang & FU Jinkunstate key{2. for physical chemistry of solid Surface, department of chemistry, xiamen university, xiamen 361.05, china state {1.{2. for physical chemistry of solid Surface Department of Chemistry Xiamen University Xiamen China

Preliminary study on the mechanism of Pd2. biosorption by resting cells of Bacillus licheniformis R08 biomass has been carried out by means of chemical kinetics and AAS, TEM, XRD and FTIR methods. The results showed that at 30°C and pH 3.5, when dry R08 biomass powder (800 mg/L) was mixed with Pd2. (1.0 mg/L) for 45 min, the rate constant k of biosorption of Pd2. attained a maximum of 5.97×1.-2.min-1.and the half life period of the reaction reached 1.0}min. The part of Pd2. adsorbed by R08 biomass was reduced to elemental, cell-bound Pd0 at the same condition. The cell wall of R08 biomass was the primary location for accumulating Pd2., and aldoses, i. e. hy-drolysate of a part of polysaccharides on the peptidoglycan layer in the acidic medium, serving as the electron donor, in situ reduced the Pd2. to Pd0.

关键词： Bacillus licheniformis biosorption palladium non-en-zymatically mediated bioreduction FTIR.

A Molecular Orbital Study of NO Adsorption on Magnesium Oxide

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Chemical Research in Chinese Universities 1998年第2期14卷 107-109页

作者： LU Xin,XU Xin,WANG Nan qin and ZHANG Qian er(state key {1. for Physiscal chemistry of solid surfaces,Institute of physical chemistry,department of chemistry,xiamen {1.},xiamen,361.05) xiamen Univ Dept Chem Inst Phys Chem State Key Lab Phys Chem Solid Surfaces Xiamen 361005 Peoples R China

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关键词： ON MgO ab initio DFT Chemisorption

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LiAl中空位形成能的第一原理计算

物理学报 2003年第9期52卷 2229-2234页

作者：陈丽娟侯柱锋朱梓忠杨勇厦门大学物理系厦门361005 厦门大学固体表面物理化学国家重点实验室厦门361005

LiAl是一种非常典型和有重要用途的金属间化合物 .采用平面波展开和第一原理赝势法 ,计算了LiAl化合物中Li空位和Al空位的形成能和空位周围的原子弛豫 ,讨论了空位形成时电荷密度的重新分布。

关键词： LiAl 锂铝合金空位形成能第一原理计算原子弛豫电荷密度能带结构电子态密度

Interaction of citrate with Pt(1.0) surface investigated by cyclic voltammetry towards understanding the structure-tuning effect in nanomaterials synthesis

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中国科学:化学 2012年第11期42卷 1653-1654页

作者： CHEN DeHao,YE JinYu,XU ChangDeng,LI Xin,LI JunTao,ZHEN ChunHua,TIAN Na,ZHOU ZhiYou & SUN ShiGang state key {1. of physical chemistry of solid surfaces department of chemistry,College of chemistry and Chemical Engineering and School of Energy Research,xiamen {1.},xiamen {1.},china state key {1. of physical chemistry of solid surfaces department of chemistry College of chemistry and Chemical Engineering and School of Energy Research xiamen university {1.} {1.}

This study aims to understand the effects of functional agents such as capping agents,stabilizers,surfactants and additives in shape-controlled synthesis of *** well-defined Pt(1.0) single crystal surface was used as a model to investigate its interaction with citrate,a capping agent that is often used in shape-controlled synthesis of *** demonstrated that,through a systematic study of electrochemical cyclic voltammetry,the presence of citrate in solution could increase the current peak density of hydrogen adsorption at high potential (j p,L),while decrease proportionally the current peak density of hydrogen adsorption at low potential (j p,S).Furthermore,the increase of citrate concentration shifted negatively the peak potentials (E p,L and E p,S) of both j p,L and j p,*** results indicated that the interaction of citrate with Pt(1.0) surface could induce increasing the (1.0) surface domains of two-dimensional long range order (2.-(1.0)),and decreasing the (1.0) surface domains of one-dimensional short range order (1.-(1.0)).It also revealed that the interaction of citrate with Pt(1.0) surface could stabilize the 2.-(1.0) *** findings gained in this study implied that the citrate may lead to form stable 2.-(1.0) domains on Pt nanoparticles upon the shape-controlled synthesis of Pt nanomaterials.

关键词： citrate interaction Pt(1.0) adsorption

IN　SITU　FTIR　AND　UV／VIS　STUDY　OF　THE　ADSORPTION　OF　CYTOCHROME　C　ON　GOLO　ELECTRODE

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Chinese Chemical Letters 1994年第11期5卷 971-974页

作者： Jin LUO Zhong Hua LIN Shao Hua HUANG Jin Tian WU (state key{2. for physical chemistry of the solid Surface (department of chemistry,xiamen university, xiamen 361.05)

The adsorption behaviour has been studied using in situ FTIR and UV/Vis spectroscopy,voltammetry,AC impedance and polential step *** results show that cytochrome c can be irreversibly adsorbed on the gold surface in a complete monolayer and the adsorbed layer can mediate the redox reaction of cytochrome c in the solotiorr but not ail adsorbed cytochrome c molecules would play this role.

关键词： VIS STUDY AND SITU FTIR ADSORPTION UV