Lee, Chan Woo Shin, Seung-Jae Jung, Hyejin Dang Le Tri Nguyen 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 2024-01-19T19:30:31Z 2024-01-19T19:30:31Z 2021-09-05 2019-09 2380-8195 https://pubs.kist.re.kr/handle/201004/119620 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 H-2 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. English AMER CHEMICAL SOC CO2 ELECTROREDUCTION CARBON-DIOXIDE COPPER-CERIA REDUCTION CATALYSTS SURFACES EVOLUTION PLATINUM COVERAGE STATE Metal-Oxide Interfaces for Selective Electrochemical C-C Coupling Reactions Article 10.1021/acsenergylett.9b01721 1 ACS ENERGY LETTERS, v.4, no.9, pp.2241 - 2248 ACS ENERGY LETTERS 4 9 2241 2248 scie scopus 000486361500028 2-s2.0-85072328410 Chemistry, Physical Electrochemistry Energy & Fuels Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Electrochemistry Energy & Fuels Science & Technology - Other Topics Materials Science Article CO2 ELECTROREDUCTION CARBON-DIOXIDE COPPER-CERIA REDUCTION CATALYSTS SURFACES EVOLUTION PLATINUM COVERAGE STATE