Performance and degradation of high temperature polymer electrolyte fuel cell catalysts

被引：107

作者：

Arico, A. S. ^{[1
]}

Stassi, A. ^{[1
]}

Modica, E. ^{[1
]}

Ornelas, R. ^{[1
]}

Gatto, I. ^{[1
]}

Passalacqua, E. ^{[1
]}

Antonucci, V. ^{[1
]}

机构：

[1] CNR ITAE, I-98126 Messina, Italy

来源：

JOURNAL OF POWER SOURCES | 2008年 / 178卷 / 02期

关键词：

PEMFCs; high temperature; automotive; Pt catalysts; Pt alloys;

D O I：

10.1016/j.jpowsour.2007.10.005

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 [物理化学]; 081704 [应用化学];

摘要：

An investigation of carbon-supported Pt/C and PtCo/C catalysts was carried out with the aim to evaluate their stability under high temperature polymer electrolyte membrane fuel cell (PEMFC) operation. Carbon-supported nanosized Pt and PtCo particles with a mean particle size between 1.5 nm and 3 nm were prepared by using a colloidal route. A suitable degree of alloying was obtained for the PtCo catalyst by using a carbothermal reduction. The catalyst stability was investigated to understand the influence of carbon black corrosion, platinum dissolution and sinteting in gas-fed sulphuric acid electrolyte half-cell at 75 degrees C and in PEMFC at 130 degrees C. Electrochemical active surface area and catalyst performance were determined in PEMFC at 80 degrees C and 130 degrees C. A maximum power density of about 700 MW cm(-2) at 130 degrees C and 3 bar abs. O-2 pressure with 0.3 mg Pt cm(-2) loading was achieved. The PtCo alloy showed a better stability than Pt in sulphuric acid after cycling; yet, the PtCo/C catalyst showed a degradation after the carbon corrosion test. The PtCo/C catalyst showed smaller sintering effects than Pt/C after accelerated degradation tests in PEMFC at 130 degrees C. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：525 / 536

页数：12

共 37 条

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