Preparation, testing and modeling of three-dimensionally ordered catalytic layers for electrocatalysis of fuel cell reactions

被引：30

作者：

Ruvinskiy, P. S. ^{[1
]}

Bonnefont, A. ^{[2
]}

Houlle, M. ^{[1
]}

Pham-Huu, C. ^{[1
]}

Savinova, E. R. ^{[1
]}

机构：

[1] Univ Strasbourg, Lab Mat Surfaces & Procedes Catalyse, ECPM, CNRS,UMR 7515,UdS, F-67087 Strasbourg 2, France

[2] Univ Strasbourg, Inst Chim Strasbourg, UMR 7177, CNRS, F-67070 Strasbourg, France

来源：

ELECTROCHIMICA ACTA | 2010年 / 55卷 / 09期

关键词：

Vertically aligned carbon nano-filaments; Modeling; Oxygen reduction reaction; Hydrogen oxidation reaction; Effectiveness factor; Thiele modulus; ALIGNED CARBON NANOTUBES; OXYGEN REDUCTION CATALYSTS; HIGH-MASS TRANSPORT; ELECTROCHEMICAL OXIDATION; METHANOL OXIDATION; HYDROGEN OXIDATION; ELECTRODES; SUPPORT; GROWTH; ELECTROREDUCTION;

D O I：

10.1016/j.electacta.2010.01.033

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The arrays of vertically aligned carbon nano-filaments (VACNF) were synthesized by catalytic chemical vapor deposition on TiOx substrates, obtained via oxidative treatment of polycrystalline Ti and Ti thin films on Si(1 0 0). VACNF were studied using scanning and transmission electron microscopies. The Pt deposition on VACNF was utilized to prepare a set of model catalysts, which were investigated in two fuel cell related reactions: the oxygen reduction (ORR) and the hydrogen oxidation (HOR) reactions. The experimental data were compared with the results of mathematical modeling performed for a fast (quasi)reversible and a slow irreversible electrochemical reaction. The approach made it possible to study electrochemical reactions (HOR, ORR) on nano-materials under well defined mass transport conditions. The influence of the catalytic layer thickness and the Pt coverage on the penetration depth of the reactive species inside the layer and consequently on the performance and on the Pt effectiveness factor were analyzed. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：3245 / 3256

页数：12

共 59 条

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