An investigation of Pt alloy oxygen reduction catalysts in phosphoric acid doped PBI fuel cells

被引：34
|
作者：
Mamlouk, M. [1 ]
Scott, K. [1 ]
机构：
[1] Newcastle Univ, Sch Chem Engn & Adv Mat, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England
来源：
JOURNAL OF POWER SOURCES | 2011年 / 196卷 / 03期
基金：
英国工程与自然科学研究理事会;
关键词：
Phosphoric acid; Polybenzimidazole; Fuel cell; Oxygen reduction; Pt alloy catalysts; Electrode performance; ELECTROLYTE MEMBRANES; POLYBENZIMIDAZOLE; SURFACE; PERFORMANCE;
D O I：
10.1016/j.jpowsour.2010.08.021
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：
A study of a phosphoric acid doped polybenzimidazole (PBI) membrane fuel cell using commercial carbon supported, Pt alloy oxygen reduction catalysts is reported. The cathodes were from PTFE bonded carbon supported Pt alloys without PBI but with phopshoric acid added to the electrode for ionic conductivity. Polarisation data for fuel cells with cathodes made with alloys of Pt with Ni, Co, Ru and Fe are compared with those with Pt alone as cathode at temperatures between 120 and 175 degrees C. With the same loading of Pt enhancement in cell performance was achieved with all alloys except Pt-Ru, in the low current density activation kinetics region of operation. The extent of enhancement depended upon the operation temperature and also the catalyst loading. In particular a Pt-Co alloy produced performance significantly better than pt alone, e.g. a peak power, with low pressure air, of 0.25W cm(-2) with 0.2mg Pt cm(-2) of a 20 wt % Pt-Co catalyst. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：1084 / 1089
页数：6
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