Cited by 228CO2 Reduction Techniques and CatalystsCarbon dioxide utilization in catalysisAdvanced Photocatalysis Techniques

Selective Electrochemical Production of Formate from Carbon Dioxide with Bismuth-Based Catalysts in an Aqueous Electrolyte

Lee, Chan Woo, Hong, Jung Sug, Yang, Ki Dong, Jin, Kyoungsuk, Lee, Jun Ho, Ahn, Hyo-Yong, Seo, Hongmin, Sung, Nark-Eon +1 more·2018·ACS Catalysis

Abstract

For the efficient electroconversion of CO 2 to formate, CO and H 2 evolution must be suppressed. Herein, carbon-supported BiO x nanoparticles (BiO x /C) were investigated as a potential candidate for CO 2 reduction. In bicarbonate solutions, the BiO x /C catalysts exhibited a high Faradaic efficiency of 93.4% for formate from −1.37 to −1.70 V versus Ag/AgCl with a negligible amount of CO and H 2 . Stable partial current densities and high Faradaic efficiencies were also achieved in 0.5 M NaCl (12.5 mA cm –2 and 96.0%, respectively). The possible reaction pathways and kinetic parameters of formate formation were examined using systematic electrochemical methods, including Tafel, pH dependence, and in situ X-ray absorption near-edge structure analyses. From the results of these mechanistic studies, we propose that dual mechanisms are functional on the BiO x /C catalysts. Specifically, a two-electron and one-proton transfer reaction to adsorbed CO 2 or a chemical proton transfer reaction to CO 2 – anion are the possible rate-determining steps (RDSs) at low potentials, whereas a one-electron transfer reaction to CO 2 is the RDS at high potentials.

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Crossref · 10.1021/acscatal.7b03242

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Authors
Lee, C. W., Hong, J. S., Yang, K. D., Jin, K., Lee, J. H., Ahn, H.-Y., Seo, H., Sung, N.-E., & Nam, K. T.
Affiliations
  • Seoul National University (KR)
  • Department of Materials Science and Engineering, Seoul National University, Seoul 151-744, Korea
  • Pohang University of Science and Technology (KR)
Corresponding author
Nam, Ki Tae
Venue
ACS Catalysis
Published
2018-01-05
Volume
8
Issue
2
Pages
931-937
ISSN
2155-5435 (ISSN-L)
OpenAlex
W2777166726
Cited by
228
References
61
Citations by year
2026: 11 · 2025: 12 · 2024: 21 · 2023: 20 · 2022: 39 · 2021: 31 · 2020: 38 · 2019: 41 · 2018: 15
FWCI
6.89
Type
journal article
Language
en
Open access
closed
Locations
ACS Catalysis (publishedVersion)
Funders
  • National Research Foundation of Korea (2011-0031571)
  • Air Force Office of Scientific Research (FA2386-15-1-4019)
  • Korea Institute of Science and Technology (2E00000)
  • Ministry of Science, ICT and Future Planning
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › CO2 Reduction Techniques and Catalysts
  • Physical Sciences › Chemical Engineering › Process Chemistry and Technology › Carbon dioxide utilization in catalysis
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Advanced Photocatalysis Techniques
Keywords
CO2 reduction, formate production, bismuth oxide nanoparticles, selective electrocatalysis, bicarbonate electrolyte, Faradaic efficiency, reaction mechanism, rate-determining step, proton transfer, in situ XANES

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