Synthesis of three-dimensionally ordered macro-/mesoporous Pt with high electrocatalytic activity by a dual-templating approach
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- 作者：Chengwei Zhang ; Hui Yang ; Tingting Sun ; Nannan Shan ; Jianfeng Chen ; Lianbin Xu ; Yushan Yan
- 关键词：Macro-/mesoporous structure ; Platinum ; Electrocatalyst ; Colloidal crystal templating ; Lyotropic liquid crystal ; Methanol oxidation reaction
- 刊名：Journal of Power Sources
- 出版年：2014
- 出版时间：1 January, 2014
- 年：2014
- 卷：245
- 期：Complete
- 页码：579-582
- 全文大小：1373 K
文摘
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.