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초록
Partially positive-charged copper (Cuδ+) is known to boost the formation of highly valued multicarbon C2+ products during the electrochemical CO2 reduction reaction (CO2RR). In this work, we doped boron in copper oxide (B-CuO) to create Cuδ+ sites and studied two important aspects regarding the CO2RR: (1) the direct observation of the CO reaction intermediate on the Cuδ+ surface and (2) the role of Cuδ+ in enhancing C2+ selectivity. Operando attenuated total reflection surface-enhanced infrared absorption spectroscopy (ATR-SEIRAS) showed that distinct CO intermediates were present on CuO and B-CuO surfaces during the CO2RR. We observed that multiple CO adsorption sites and strong adsorption of the CO intermediate on the Cuδ+ surface promote the C-C coupling reaction in B-CuO. As a result, we achieved a C2+ Faradaic efficiency of 62.1% at -0.62 V versus reversible hydrogen electrode on B-CuO. In contrast, only 48% was achieved at -0.65 V on the CuO catalyst. © 2020 American Chemical Society.
키워드
- 제목
- Operando Spectroscopic Investigation of a Boron-Doped CuO Catalyst and Its Role in Selective Electrochemical C-C Coupling
- 저자
- Patra, Kshirodra Kumar; Park, Sojung; Song, Hakhyeon; Kim, Beomil; Kim, Wooyul; Oh, Jihun
- 발행일
- 2020-11
- 유형
- Article
- 저널명
- ACS Applied Energy Materials
- 권
- 3
- 호
- 11
- 페이지
- 11343 ~ 11349