Preparation of supported Pt-Co alloy nanoparticle catalysts for the oxygen reduction reaction by coverage with silica

被引：51

作者：

Takenaka, Sakae ^{[1
]}

Hirata, Akiko ^{[1
]}

Tanabe, Eishi ^{[2
]}

Matsune, Hideki ^{[1
]}

Kishida, Masahiro ^{[1
]}

机构：

[1] Kyushu Univ, Grad Sch Engn, Dept Chem Engn, Nishi Ku, Fukuoka 8190395, Japan

[2] Hiroshima Prefectural Technol Res Inst, Hiroshima 7390046, Japan

来源：

JOURNAL OF CATALYSIS | 2010年 / 274卷 / 02期

关键词：

Pt-Co alloy catalysts; Silica coating; Polymer-electrolyte fuel cells; Oxygen reduction reaction; TEMPERATURE FUEL-CELLS; CATHODE CATALYSTS; CARBON NANOTUBES; METHANE DECOMPOSITION; PARTICLE-SIZE; SURFACE-AREA; NI CATALYSTS; PLATINUM; DURABILITY; ELECTROCATALYSTS;

D O I：

10.1016/j.jcat.2010.07.005

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 ; 081704 ;

摘要：

Pt-based alloy catalysts such as carbon black-supported Pt-Co catalysts (Pt-Co/CB) are used in the oxygen reduction reaction in polymer-electrolyte fuel cells (PEFCs) and are generally treated at high temperatures to allow for alloy formation. However, treatment of these catalysts at high temperatures results in serious aggregation of alloy particles. In this study, a Pt-Co/CB catalyst was covered with silica layers to inhibit the aggregation of alloy particles during treatment of the catalyst at high temperature for alloy formation. Coverage of Pt-Co/CB with silica promoted Pt-Co alloy formation with a high alloying degree and a small particle size, whereas the alloying degree of Pt-Co alloys in Pt-Co/CB without silica-coating was low, and these alloy particles were seriously aggregated during treatment at high temperature. These silica-coated Pt-Co/CB catalysts showed high activity and excellent durability for the oxygen reduction reaction. (C) 2010 Elsevier Inc. All rights reserved.

引用

页码：228 / 238

页数：11

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