Ex Situ and In Situ Stability of Platinum Supported on Niobium-Doped Titania for PEMFCs

被引：61

作者：

Chhina, H. ^{[1
,2
]}

Campbell, S. ^{[1
]}

Kesler, O. ^{[2
]}

机构：

[1] Automot Fuel Cell Cooperat Corp, Burnaby, BC V5J 5J8, Canada

[2] Univ Toronto, Dept Mech & Ind Engn, Toronto, ON M5S 3G8, Canada

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2009年 / 156卷 / 10期

关键词：

CATALYST SUPPORT; OXIDE; ELECTROCATALYSTS; OXYGEN; REDUCTION; CORROSION;

D O I：

10.1149/1.3184155

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

070208 [无线电物理];

摘要：

The stability and activity of 10 mol % mobium-doped titania (10Nb-TiO2) were compared to those of commercial Pt/C catalyst (HiSpec 4000), both ex situ and in a proton exchange membrane fuel cell. The stability test involved holding the cell at 1.4 V for 20 h. Fuel cell polarization curves were obtained both before and after the potential holds. Cyclic voltammogram data showed that the Pt surface area was stable for Pt/10Nb-TiO2 even after holding for 60 h at 1.4 V. A significant drop in the Pt surface area was observed, however, for Pt/C after 20 h at 1.4 V. The high potential hold test showed significantly higher stability of the membrane electrode assembly with Pt/10Nb-TiO2 compared to that with Pt/C. (C) 2009 The Electrochemical Society. [DOI: 10.1149/1.3184155] All rights reserved.

引用

页码：B1232 / B1237

页数：6

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