Contributors to Enhanced CO2 Electroreduction Activity and Stability in a Nanostructured Au Electrocatalyst

Haeri Kim, Hyo Sang Jeon, Michael Shincheon Jee, Eduardus Budi Nursanto, Jitendra Pal Singh, Keunhwa Chae, Yun Jeong Hwang, Byoung Koun Min

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

The formation of a nanostructure is a popular strategy for catalyst applications because it can generate new surfaces that can significantly improve the catalytic activity and durability of the catalysts. However, the increase in the surface area resulting from nanostructuring does not fully explain the substantial improvement in the catalytic properties of the CO2 electroreduction reaction, and the underlying mechanisms have not yet been fully understood. Here, based on a combination of extended X-ray absorption fine structure analysis, X-ray photoelectron spectroscopy, and Kelvin probe force microscopy, we observed a contracted Au−Au bond length and low work function with the nanostructured Au surface that had enhanced catalytic activity for electrochemical CO2 reduction. The results may improve the understanding of the enhanced stability of the nanostructured Au electrode based on the resistance of cation adhesion during the CO2 reduction reaction.

Original languageEnglish
Pages (from-to)2097-2102
Number of pages6
JournalChemSusChem
Volume9
Issue number16
DOIs
Publication statusPublished - 2016

Keywords

  • Au
  • carbon dioxide
  • electrocatalyst
  • electroreduction
  • X-ray photoelectron spectroscopy

ASJC Scopus subject areas

  • Environmental Chemistry
  • Chemical Engineering(all)
  • Materials Science(all)
  • Energy(all)

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    Kim, H., Jeon, H. S., Jee, M. S., Nursanto, E. B., Singh, J. P., Chae, K., Hwang, Y. J., & Min, B. K. (2016). Contributors to Enhanced CO2 Electroreduction Activity and Stability in a Nanostructured Au Electrocatalyst. ChemSusChem, 9(16), 2097-2102. https://doi.org/10.1002/cssc.201600228