Mechanistic study of the deactivation of carbon supported Pd during formic acid oxidation

被引：121

作者：

Yu, Xingwen ^{[1
]}

Pickup, Peter G. ^{[1
]}

机构：

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

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2009年 / 11卷 / 10期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Formic acid; Fuel cell; Pd/C; Deactivation; Stripping; Catalyst; FUEL-CELLS; ELECTROOXIDATION; ELECTRODES; NANOPARTICLES; CATALYSTS; SURFACE; DFAFC; CO;

D O I：

10.1016/j.elecom.2009.08.041

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Palladium is an attractive anode catalyst for direct formic acid fuel cells (DFAFC) because of its high activity relative to Pt, but it suffers significant activity losses during operation of the DFAFC. The deactivation mechanism of a Pd/C catalyst during oxidation of formic acid has been studied by means of electrochemical stripping voltammetry. The stripping characteristics of the anode poison are virtually the same as those of adsorbed CO, and adsorbed CO has a similar poisoning effect. It is therefore proposed that a gradual build-up of adsorbed CO causes the deactivation of Pd in DFAFCs. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：2012 / 2014

页数：3

共 15 条

[11] Formic acid oxidation on Pd-modified Pt(100) and Pt(111) electrodes:: A DEMS study [J].

Vidal-Iglesias, F. J. ;

Solla-Gullon, J. ;

Herrero, E. ;

Aldaz, A. ;

Feliu, J. M. .

JOURNAL OF APPLIED ELECTROCHEMISTRY, 2006, 36 (11) :1207-1214

[12] Recent advances in direct formic acid fuel cells (DFAFC) [J].

Yu, Xingwen ;

Pickup, Peter G. .

JOURNAL OF POWER SOURCES, 2008, 182 (01) :124-132

[13] Deactivation/reactivation of a Pd/C catalyst in a direct formic acid fuel cell (DFAFC): Use of array membrane electrode assemblies [J].

Yu, Xingwen ;

Pickup, Peter G. .

JOURNAL OF POWER SOURCES, 2009, 187 (02) :493-499

[14] Size effects in electronic and catalytic properties of unsupported palladium nanoparticles in electrooxidation of formic acid [J].

Zhou, Wei Ping ;

Lewera, Adam ;

Larsen, Robert ;

Masel, Rich I. ;

Bagus, Paul S. ;

Wieckowski, Andrzej .

JOURNAL OF PHYSICAL CHEMISTRY B, 2006, 110 (27) :13393-13398

[15] The behavior of palladium catalysts in direct formic acid fuel cells [J].

Zhu, YM ;

Khan, Z ;

Masel, RI .

JOURNAL OF POWER SOURCES, 2005, 139 (1-2) :15-20

← 1 2 →