Undercoordinated Active Sites on 4H Gold Nanostructures for CO2Reduction

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Yuxuan Wang
  • Chenyang Li
  • Ye Chen
  • Xing Li
  • Liang Cao
  • Canhui Wang
  • Lei Wang
  • Dong Su
  • Tim Mueller
  • Chao Wang

Detail(s)

Original languageEnglish
Pages (from-to)8074–8080
Journal / PublicationNano Letters
Volume20
Issue number11
Online published26 Oct 2020
Publication statusPublished - 11 Nov 2020

Abstract

Electroreduction of CO2 is a promising approach toward artificial carbon recycling. The rate and product selectivity of this reaction are highly sensitive to the surface structures of electrocatalysts. We report here 4H Au nanostructures as advanced electrocatalysts for highly active and selective reduction of CO2 to CO. Au nanoribbons in the pure 4H phase, Au nanorods in the hybrid 4H/fcc phase, and those in the fcc phase are comparatively studied for the electroreduction of CO2. Both the activity and selectivity for CO production were found to exhibit the trend 4H-nanoribbons > 4H/fcc-nanorods > fcc-nanorods, with the 4H-nanoribbons achieving >90% Faradaic efficiency toward CO. Electrochemical probing and cluster expansion simulations are combined to elucidate the surface structures of these nanocrystals. The combination of crystal phase and shape control gives rise to the preferential exposure of undercoordinated sites. Further density functional theory calculations confirm the high reactivity of such undercoordinated sites.

Research Area(s)

  • 4H gold nanostructures, cluster expansion, CO2reduction, density functional theory, electrocatalysis, shape control

Citation Format(s)

Undercoordinated Active Sites on 4H Gold Nanostructures for CO2Reduction. / Wang, Yuxuan; Li, Chenyang; Fan, Zhanxi; Chen, Ye; Li, Xing; Cao, Liang; Wang, Canhui; Wang, Lei; Su, Dong; Zhang, Hua; Mueller, Tim; Wang, Chao.

In: Nano Letters, Vol. 20, No. 11, 11.11.2020, p. 8074–8080.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review