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 language | English |
|---|---|
| Pages (from-to) | 2241-2248 |
| Number of pages | 8 |
| Journal | ACS Energy Letters |
| Volume | 4 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 2019 Sep 13 |
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ASJC Scopus subject areas
- Chemistry (miscellaneous)
- Renewable Energy, Sustainability and the Environment
- Fuel Technology
- Energy Engineering and Power Technology
- Materials Chemistry
Cite this
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 journal › Article
}
TY - JOUR
T1 - Metal-Oxide Interfaces for Selective Electrochemical C-C Coupling Reactions
AU - Lee, Chan Woo
AU - Shin, Seung Jae
AU - Jung, Hyejin
AU - Nguyen, Dang Le Tri
AU - Lee, Si Young
AU - Lee, Woong Hee
AU - Won, Da Hye
AU - Kim, Min Gyu
AU - Oh, Hyung Suk
AU - Jang, Taehwan
AU - Kim, Hyungjun
AU - Min, Byoung Koun
AU - Hwang, Yun Jeong
PY - 2019/9/13
Y1 - 2019/9/13
N2 - 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.
AB - 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.
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U2 - 10.1021/acsenergylett.9b01721
DO - 10.1021/acsenergylett.9b01721
M3 - Article
AN - SCOPUS:85072328410
VL - 4
SP - 2241
EP - 2248
JO - ACS Energy Letters
JF - ACS Energy Letters
SN - 2380-8195
IS - 9
ER -