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

9 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
Externally publishedYes

Fingerprint

Surface-Active Agents
Surface structure
Gold
Surface active agents
Tuning
Catalysts
Metals
Surface relaxation
Electrocatalysis
Catalyst selectivity
Surface treatment
Catalyst activity
Ethanol
Oxidation

Keywords

  • electrocatalysis
  • nanoporous gold
  • surface engineering
  • surface structure

ASJC Scopus subject areas

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

Cite this

Tuning Surface Structure of 3D Nanoporous Gold by Surfactant-Free Electrochemical Potential Cycling. / Wang, Zhili; Ning, Shoucong; Liu, Pan; Ding, Yi; Hirata, Akihiko; Fujita, Takeshi; Chen, Mingwei.

In: Advanced Materials, Vol. 29, No. 41, 1703601, 06.11.2017.

Research output: Contribution to journalArticle

Wang, Zhili ; Ning, Shoucong ; Liu, Pan ; Ding, Yi ; Hirata, Akihiko ; Fujita, Takeshi ; Chen, Mingwei. / Tuning Surface Structure of 3D Nanoporous Gold by Surfactant-Free Electrochemical Potential Cycling. In: Advanced Materials. 2017 ; Vol. 29, No. 41.
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