Engineering the internal surfaces of three-dimensional nanoporous catalysts by surfactant-modified dealloying

Zhili Wang, Pan Liu, Jiuhui Han, Chun Cheng, Shoucong Ning, Akihiko Hirata, Takeshi Fujita and Mingwei Chen ()
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Zhili Wang: Tohoku University
Pan Liu: Shanghai Jiao Tong University
Jiuhui Han: Tohoku University
Chun Cheng: Tohoku University
Shoucong Ning: Hong Kong University of Science and Technology
Akihiko Hirata: Tohoku University
Takeshi Fujita: Tohoku University
Mingwei Chen: Tohoku University

Nature Communications, 2017, vol. 8, issue 1, 1-8

Abstract: Abstract Tuning surface structures by bottom-up synthesis has been demonstrated as an effective strategy to improve the catalytic performances of nanoparticle catalysts. Nevertheless, the surface modification of three-dimensional nanoporous metals, fabricated by a top-down dealloying approach, has not been achieved despite great efforts devoted to improving the catalytic performance of three-dimensional nanoporous catalysts. Here we report a surfactant-modified dealloying method to tailor the surface structure of nanoporous gold for amplified electrocatalysis toward methanol oxidation and oxygen reduction reactions. With the assistance of surfactants, {111} or {100} faceted internal surfaces of nanoporous gold can be realized in a controllable manner by optimizing dealloying conditions. The surface modified nanoporous gold exhibits significantly enhanced electrocatalytic activities in comparison with conventional nanoporous gold. This study paves the way to develop high-performance three-dimensional nanoporous catalysts with a tunable surface structure by top-down dealloying for efficient chemical and electrochemical reactions.

Date: 2017
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DOI: 10.1038/s41467-017-01085-3

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