Tuning Surface Structure of 3D Nanoporous Gold by Surfactant-Free Electrochemical Potential Cycling

Zhili Wang, Shoucong Ning, Pan Liu, Yi Ding, Akihiko Hirata, Takeshi Fujita, Mingwei Chen

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

3D dealloyed nanoporous metals have emerged as a new class of catalysts for various chemical and electrochemical reactions. Similar to other heterogeneous catalysts, the surface atomic structure of the nanoporous metal catalysts plays a crucial role in catalytic activity and selectivity. Through surfactant-assisted bottom-up synthesis, the surface-structure modification has been successfully realized in low-dimensional particulate catalysts. However, the surface modification by top-down dealloying has not been well explored for nanoporous metal catalysts. Here, a surfactant-free approach to tailor the surface structure of nanoporous gold by surface relaxation via electrochemical redox cycling is reported. By controlling the scan rates, nanoporous gold with abundant {111} facets or {100} facets can be designed and fabricated with dramatically improved electrocatalysis toward the ethanol oxidation reaction.

Original languageEnglish
Article number1703601
JournalAdvanced Materials
Volume29
Issue number41
DOIs
Publication statusPublished - 2017 Nov 6

Keywords

  • electrocatalysis
  • nanoporous gold
  • surface engineering
  • surface structure

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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