Metal-Oxide Interfaces for Selective Electrochemical C-C Coupling Reactions
- Metal-Oxide Interfaces for Selective Electrochemical C-C Coupling Reactions
- 민병권; 황윤정; 오형석; 원다혜; 이웅희; 이찬우; 정혜진; 이시영; Seung-Jae Shin; Dang Le Tri Nguyen; Min Gyu Kim; Taehwan Jang; Hyungjun Kim
- Issue Date
- ACS energy letters
- VOL 4-2248
- 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.
- Appears in Collections:
- KIST Publication > Article
- Files in This Item:
There are no files associated with this item.
- RIS (EndNote)
- XLS (Excel)
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.