Metal-Oxide Interfaces for Selective Electrochemical C-C Coupling Reactions

Chan Woo Lee, Seung Jae Shin, Hyejin Jung, Dang Le Tri Nguyen, Si Young Lee, Woong Hee Lee, Da Hye Won, Min Gyu Kim, Hyung Suk Oh, Taehwan Jang, Hyungjun Kim, Byoung Koun Min, Yun Jeong Hwang

Research output: Contribution to journalArticle

Abstract

Metal-oxide interfaces provide a new opportunity to improve catalytic activity based on electronic and chemical interactions at the interface. Constructing a high density of interfaces is essential in maximizing synergistic interactions. Here, we demonstrate that Cu-ceria interfaces made by sintering nanocrystals facilitate C-C coupling reactions in electrochemical reduction of CO2. The Cu/ceria catalyst enhances the selectivity of ethylene and ethanol production with the suppression of H2 evolution in comparison with Cu catalysts. The intrinsic activity for ethylene production is enhanced by decreasing the atomic ratio of Cu/Ce, revealing the Cu atoms near ceria are an active site for C-C coupling reactions. The ceria is proposed to weaken the hydrogen binding energy of adjacent Cu sites and stabilize an OCCO intermediate via an additional chemical interaction with an oxygen atom of the OCCO. This work offers new insights into the role of the metal-oxide interface in the electrochemical reduction of CO2 to high-value chemicals.

Original languageEnglish
Pages (from-to)2241-2248
Number of pages8
JournalACS Energy Letters
Volume4
Issue number9
DOIs
Publication statusPublished - 2019 Sep 13

Fingerprint

Cerium compounds
Oxides
Metals
Ethylene
Atoms
Catalysts
Catalyst selectivity
Binding energy
Nanocrystals
Hydrogen
Catalyst activity
Ethanol
Sintering
Oxygen
ethylene

ASJC Scopus subject areas

  • Chemistry (miscellaneous)
  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Materials Chemistry

Cite this

Lee, C. W., Shin, S. J., Jung, H., Nguyen, D. L. T., Lee, S. Y., Lee, W. H., ... Hwang, Y. J. (2019). Metal-Oxide Interfaces for Selective Electrochemical C-C Coupling Reactions. ACS Energy Letters, 4(9), 2241-2248. https://doi.org/10.1021/acsenergylett.9b01721

Metal-Oxide Interfaces for Selective Electrochemical C-C Coupling Reactions. / Lee, Chan Woo; Shin, Seung Jae; Jung, Hyejin; Nguyen, Dang Le Tri; Lee, Si Young; Lee, Woong Hee; Won, Da Hye; Kim, Min Gyu; Oh, Hyung Suk; Jang, Taehwan; Kim, Hyungjun; Min, Byoung Koun; Hwang, Yun Jeong.

In: ACS Energy Letters, Vol. 4, No. 9, 13.09.2019, p. 2241-2248.

Research output: Contribution to journalArticle

Lee, CW, Shin, SJ, Jung, H, Nguyen, DLT, Lee, SY, Lee, WH, Won, DH, Kim, MG, Oh, HS, Jang, T, Kim, H, Min, BK & Hwang, YJ 2019, 'Metal-Oxide Interfaces for Selective Electrochemical C-C Coupling Reactions', ACS Energy Letters, vol. 4, no. 9, pp. 2241-2248. https://doi.org/10.1021/acsenergylett.9b01721
Lee, Chan Woo ; Shin, Seung Jae ; Jung, Hyejin ; Nguyen, Dang Le Tri ; Lee, Si Young ; Lee, Woong Hee ; Won, Da Hye ; Kim, Min Gyu ; Oh, Hyung Suk ; Jang, Taehwan ; Kim, Hyungjun ; Min, Byoung Koun ; Hwang, Yun Jeong. / Metal-Oxide Interfaces for Selective Electrochemical C-C Coupling Reactions. In: ACS Energy Letters. 2019 ; Vol. 4, No. 9. pp. 2241-2248.
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