Microstructural and Metal-Support Interactions of the Pt-CeO2/C Catalysts for Direct Methanol Fuel Cell Application

被引：133

作者：

Ou, Ding Rong ^{[1
,2
]}

Mori, Toshiyuki ^{[2
,5
]}

Togasaki, Hirotaka ^{[2
,5
]}

Takahashi, Motoi ^{[2
]}

Ye, Fei ^{[2
,3
]}

Drennan, John ^{[4
]}

机构：

[1] Chinese Acad Sci, Dalian Inst Chem Phys, Lab Fuel Cells, Dalian 116023, Peoples R China

[2] Natl Inst Mat Sci, Fuel Cell Mat Ctr, Tsukuba, Ibaraki 3050044, Japan

[3] Dalian Univ Technol, Sch Mat Sci & Engn, Key Lab Mat Modificat, Dalian 116024, Liaoning, Peoples R China

[4] Univ Queensland, Ctr Microscopy & Microanal, Brisbane, Qld 4072, Australia

[5] Hokkaido Univ, Grad Sch, Dept Chem, Kita Ku, Sapporo, Hokkaido 0608628, Japan

来源：

LANGMUIR | 2011年 / 27卷 / 07期

基金：

日本学术振兴会;

关键词：

ENERGY-LOSS SPECTROSCOPY; ANODE CATALYST; CARBON-BLACK; ELECTROOXIDATION; OXIDATION; CERIA; CO; NANOPARTICLES; RU; MO;

D O I：

10.1021/la1032898

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

To understand the ceria promotion effect of Pt-CeO2/C catalysts on methanol oxidation, microstructural and metal oxide interactions of Pt-CeO2/C catalysts with an atomic ratio of Pt/Ce between 0.14 and 1.4 were systematically examined using high-resolution transmission electron microscopy and electron energy loss spectroscopy (EELS). With an increasing Pt content in the catalysts, Pt particles gradually invaded into the ceria supports and decoration on Pt particles was observed. Simultaneously, the morphology of the supports was dramatically modified with nanocrystalline and amorphous ceria formed between and/or around the Pt particles. It reveals that the Pt-ceria interaction could take place in the catalysts and the influence of the interaction was enhanced with an increasing Pt/Ce ratio. The EELS study demonstrated that the strong Pt-ceria interaction was related to the redox reaction between Pt and ceria. Experimental results also suggested that the strong interaction between Pt and ceria could contribute to the promotion effect of ceria on the oxidation of methanol.

引用

页码：3859 / 3866

页数：8

共 36 条

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