期刊
JOURNAL OF POWER SOURCES
卷 245, 期 -, 页码 579-582出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2013.06.162
关键词
Macro-/mesoporous structure; Platinum; Electrocatalyst; Colloidal crystal templating; Lyotropic liquid crystal; Methanol oxidation reaction
资金
- National 973 Program of China [2009CB219903]
- National Natural Science Foundation of China [51172014, 20971012]
Three dimensionally ordered macro-/mesoporous (3DOM/m) Pt catalysts are fabricated by chemical reduction employing a dual-templating synthesis approach combining both colloidal crystal (opal) templating (hard-templating) and lyotropic liquid crystal templating (soft-templating) techniques. The macropore walls of the prepared 3DOM/m Pt exhibit a uniform mesoporous structure composed of polycrystalline Pt nanoparticles. Both the size of the mesopores and Pt nanocrystallites are in the range of 3-5 nm. The 3DOM/m Pt catalyst shows a larger electrochemically active surface area (ECSA), and higher catalytic activity as well as better poisoning tolerance for methanol oxidation reaction (MOR) than the commercial Pt black catalyst. (C) 2013 Elsevier B.V. All rights reserved.
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