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Superior electrocatalytic activity of mesoporous Au film templated from diblock copolymer micelles |
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| Authors: | Cuiling Li Bo Jiang Hungru Chen Masataka Imura Liwen Sang Victor Malgras Yoshio Bando Tansir Ahamad Saad M Alshehri Satoshi Tominaka Yusuke Yamauchi |
| Affiliation: | 1. World Premier International(WPI)Research Center for Materials Nanoarchitectonics(MANA), National Institute for Materials Science(NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan;2. World Premier International(WPI)Research Center for Materials Nanoarchitectonics(MANA), National Institute for Materials Science(NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan;Faculty of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan;3. Department of Chemistry, University of Bath, Bath BA2 7AY, UK |
| Abstract: | Mesoporous Au films consisting of a network of interconnected Au ligaments around ultra-large pores were found to exhibit a promising electrocatalytic activity towards sluggish reactions. Mesoporous Au films with pore sizes up to 25 nm were successfully fabricated using a polymeric micelle approach. A superior catalytic activity of the mesoporous Au films towards methanol oxidation was confirmed, which was thoroughly analyzed and compared with that of other Au materials. An intrinsic investigation on the high catalytic activity revealed that the superior performance of the as-prepared mesoporous Au film was related to its unique atomic structures around the mesopores with well-crystallized facets and several step/kink sites on the Au surfaces. These findings showcase a strategic and feasible design for preparing highly active Au-based catalysts that could be used as promising candidates in electrocatalytic applications. |
| Keywords: | block copolymers mesoporous materials mesoporous metals gold electrocatalysts |
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