Electrocatalytic Oxidation of Methanol on Polythionine Film Modified with Pt Microparticles

被引：7

作者：

Yang Hui ^{[1
]}

Li Changzhi ^{[1
]}

Lu Tianhong ^{[1
]}

Xue Kuanhong ^{[2
]}

Sun Shigang ^{[3
]}

Lu Guoqiang ^{[3
]}

Chen Shengpei ^{[3
]}

机构：

[1] Acad Sinica, Changchun Inst Appl Chem, Changchun 130022, Peoples R China

[2] Nanjing Normal Univ, Dept Chem, Nanjing 210097, Peoples R China

[3] Xiamen Univ, Dept Chem, Xiamen 361005, Peoples R China

来源：

ACTA PHYSICO-CHIMICA SINICA | 1997年 / 13卷 / 06期

关键词：

Platinum microparticles; Polythionine; Methanol; Electrocatalytic oxidation; In-situ FTIR;

D O I：

10.3866/PKU.WHXB19970612

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The electrocatalytic oxidation of methanol on polythionine(PTn) film modified with Pt microparticles has been studied by means of cyclic voltammetry and in-situ FTIR spectroscopy. The Pt microparticles produced by cyclic voltammetry were highly dispersed in and on the PTn film. The modified electrodes exhibit significant electrocatalytic activity for the oxidation of methano and the catalytic activity was found in dependence on the Pt loading. The linearly adsorbed CO species is the only intermediate in the oxidation of methanol and the abnormal IR spectra for adsorbed CO were observed. On such modified electrodes, adsorbed CO species derived from methanol can be readily oxidized. The enhanced electrocatalytic activity may be ascribed to the high dispersion of Pt microparticles in and on the PTn film and the synergestic effect between Pt microparticles and the polymer. From the above results, a possible reaction mechanism was proposed.

引用

页码：542 / 547

页数：6

共 14 条

[11] ELECTROCHEMICAL REDUCTION OF AQUEOUS BICARBONATE TO FORMATE WITH HIGH-CURRENT EFFICIENCY NEAR THE THERMODYNAMIC POTENTIAL AT CHEMICALLY DERIVATIZED ELECTRODES [J].

STALDER, CJ ;

CHAO, S ;

WRIGHTON, MS .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1984, 106 (12) :3673-3675

[12] METHANOL OXIDATION ON PLATINUM-TIN CATALYSTS DISPERSED ON POLY(3-METHYL)THIOPHENE CONDUCTING POLYMER [J].

SWATHIRAJAN, S ;

MIKHAIL, YM .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1992, 139 (08) :2105-2110

[13]

TORSTENSSON A, 1981, J ELECTROANAL CHEM, V130, P199, DOI 10.1016/0368-1874(81)87436-9

[14] EVIDENCE FOR COH AS AN ADSORBED INTERMEDIATE IN THE ANODIC-OXIDATION OF METHANOL BY ECDTMS AND SNIFTIRS [J].

VIELSTICH, W ;

CHRISTENSEN, PA ;

WEEKS, SA ;

HAMNETT, A .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1988, 242 (1-2) :327-333

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