Characterization of polymer supported catalysts by cyclic voltammetry and rotating disk voltammetry

被引：57

作者：

Shan, JN ^{[1
]}

Pickup, PG ^{[1
]}

机构：

[1] Mem Univ Newfoundland, Dept Chem, St Johns, NF A1B 3X7, Canada

来源：

ELECTROCHIMICA ACTA | 2000年 / 46卷 / 01期

基金：

加拿大自然科学与工程研究理事会;

关键词：

platinum; catalyst; voltammetry;

D O I：

10.1016/S0013-4686(00)00514-4

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Polymer supported catalysts prepared by the chemical deposition of Pt on chemically prepared poly(3,4-ethylenedioxythiophene)/poly(styrene-4-sulfonate have been studied as thin films in a Nafion matrix on carbon electrodes. Cyclic voltammetry has revealed that the Pt utilization is lower than for a commercial carbon supported catalyst, and this has been attributed to electronic isolation and poisoning of some of the Pt. Rotating disc voltammetry of oxygen reduction is essentially the same (similar n values, Tafel slopes, and real exchange current densities) at electrodes coated with polymer and carbon supported catalysts, with the current at any potential being approximately proportional to the active Pt area determined by cyclic voltammetry. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：119 / 125

页数：7

共 12 条

[1]

Appleby AJ, 1999, SCI AM, V281, P74, DOI 10.1038/scientificamerican0799-74

[2]

Cairns EJ, 1998, ELECTROCHIM ACTA, V43, P3629

[3] O2 reduction on an ink-type rotating disk electrode using Pt supported on high-area carbons [J].

Gojkovic, SL ;

Zecevic, SK ;

Savinell, RF .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1998, 145 (11) :3713-3720

[4] REAL ACTIVE SURFACE-AREA DETERMINATION BY ADSORPTION/DESORPTION OF OVERPOTENTIAL DEPOSITED HYDROGEN [J].

HO, JCK ;

PIRON, DL .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1995, 142 (04) :1144-1149

[5]

KINOSHITA K, 1977, MOD ASPECT ELECTROC, V12, P183

[6] Electronically conducting proton exchange polymers as catalyst supports for proton exchange membrane fuel cells - Electrocatalysis of oxygen reduction, hydrogen oxidation, and methanol oxidation [J].

Lefebvre, MC ;

Qi, ZG ;

Pickup, PG .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1999, 146 (06) :2054-2058

[7] Novel supported catalysts: platinum and platinum oxide nanoparticles dispersed on polypyrrole/polystyrenesulfonate particles [J].

Qi, ZG ;

Pickup, PG .

CHEMICAL COMMUNICATIONS, 1998, (01) :15-16

[8] Electron and proton transport in gas diffusion electrodes containing electronically conductive proton-exchange polymers [J].

Qi, ZG ;

Lefebvre, MC ;

Pickup, PG .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1998, 459 (01) :9-14

[9] High performance conducting polymer supported oxygen reduction catalysts [J].

Qi, ZG ;

Pickup, PG .

CHEMICAL COMMUNICATIONS, 1998, (21) :2299-2300

[10]

RALPH TR, 1998, CHEM IND, V337

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