Facile CO2 Electro-Reduction to Formate via Oxygen Bidentate Intermediate Stabilized by High-Index Planes of Bi Dendrite Catalyst

Jai Hyun Koh, Da Hye Won, Taedaehyeong Eom, Nak Kyoon Kim, Kwang Deog Jung, Hyungjun Kim, Yun Jeong Hwang, Byoung Koun Min

Research output: Contribution to journalArticle

58 Citations (Scopus)

Abstract

Electrochemical CO2 conversion to chemical products is a promising strategy for sustainable industrial development. However, the success of this approach requires an in-depth understanding of catalysis because it involves highly complex multistep reactions. Herein, we suggest a rational design of a hierarchical Bi dendrite catalyst for an efficient conversion of CO2 to formate. A high selectivity (∼89% at -0.74 VRHE) and, more importantly, a stable performance during long-term operation (∼12 h) were achieved with the Bi dendrite. Density functional theory (DFT) is used to investigate three possible reaction pathways in terms of surface intermediate, and the one via∗OCOH surface intermediate is calculated to be the most energetically feasible. DFT calculations further elucidate the plane-dependent catalytic activity and conclude that the high-index planes developed on the Bi dendrite are responsible for the sustainable performance of Bi dendrite. We expect that our experimental and theoretical study will provide a fundamental guideline for the CO2-to-formate conversion pathway as well as design principles for enhancing the catalytic performance.

Original languageEnglish
Pages (from-to)5071-5077
Number of pages7
JournalACS Catalysis
Volume7
Issue number8
DOIs
Publication statusPublished - 2017 Aug 4

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formic acid
Density functional theory
Oxygen
Catalysts
Catalysis
Sustainable development
Catalyst activity

Keywords

  • bismuth
  • CO reduction
  • dendrite
  • electrocatalyst
  • formate

ASJC Scopus subject areas

  • Catalysis

Cite this

Facile CO2 Electro-Reduction to Formate via Oxygen Bidentate Intermediate Stabilized by High-Index Planes of Bi Dendrite Catalyst. / Koh, Jai Hyun; Won, Da Hye; Eom, Taedaehyeong; Kim, Nak Kyoon; Jung, Kwang Deog; Kim, Hyungjun; Hwang, Yun Jeong; Min, Byoung Koun.

In: ACS Catalysis, Vol. 7, No. 8, 04.08.2017, p. 5071-5077.

Research output: Contribution to journalArticle

Koh, Jai Hyun ; Won, Da Hye ; Eom, Taedaehyeong ; Kim, Nak Kyoon ; Jung, Kwang Deog ; Kim, Hyungjun ; Hwang, Yun Jeong ; Min, Byoung Koun. / Facile CO2 Electro-Reduction to Formate via Oxygen Bidentate Intermediate Stabilized by High-Index Planes of Bi Dendrite Catalyst. In: ACS Catalysis. 2017 ; Vol. 7, No. 8. pp. 5071-5077.
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