NaBH4-assisted ethylene glycol reduction for preparation of carbon-supported Pt catalyst for methanol electro-oxidation

被引：93

作者：

Kim, Pil ^{[1
]}

Joo, Ji Bong ^{[1
]}

Kim, Wooyoung ^{[1
]}

Kim, Jongsik ^{[1
]}

Song, In Kyu ^{[1
]}

Yi, Jongheop ^{[1
]}

机构：

[1] Seoul Natl Univ, Inst Chem Proc, Sch Chem & Biol Engn, Seoul 151744, South Korea

来源：

JOURNAL OF POWER SOURCES | 2006年 / 160卷 / 02期

关键词：

carbon-supported platinum catalyst; ethylene glycol reduction; methanol electro-oxidation; sodium borohydride; nanoparticles;

D O I：

10.1016/j.jpowsour.2006.02.050

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 carbon-supported Ptcatalyst (40 wt.% loading) is prepared by a modified ethylene glycol reduction method (Pt-EG-complex). In this procedure, a complex produced by reacting ethylene glycol with sodium borohydride (NaBH4), serves as a reducing agent for the Pt precursor and as a stabilizer for preventing the growth of Pt particles. For purposes of comparison, two types of carbon-supported Pt catalyst (40 wt.% loading) are also prepared by a NaBH4 reduction method, in which the Pt precursor is reduced in a ethylene glycol solution (Pt-EG-NaBH4) and in de-ionized water (Pt-H2O-NaBH4). Analysis by X-ray diffraction and transmission electron microscopy reveal that the Pt-EG-complex catalyst is comprised of highly-dispersed Pt nanoparticles with a uniform size (2.9-3.1 nm) on the carbon support, while large Pt particles are observed in the Pt-EG-NaBH4 (3.3-3.6 nm) and Pt-H2O-NaBH4 (5.7-6.2 nm) catalysts. The Pt-EG-complex catalyst has the highest electrochemical surface area and shows the highest catalytic performance for methanol electro-oxidation. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：987 / 990

页数：4

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