Selective Production of Formaldehyde and Ethanol by Photoelectrochemical CO₂ Reduction on Polypyrrole/Reduced Graphene Oxide/CuFeO₂@CuO Photocathode
- 발행기관 서강대학교 일반대학원
- 지도교수 강영수
- 발행년도 2018
- 학위수여년월 2018. 2
- 학위명 석사
- 학과 및 전공 일반대학원 화학과
- 실제URI http://www.dcollection.net/handler/sogang/000000062894
- 본문언어 영어
- 저작권 서강대학교 논문은 저작권보호를 받습니다.
초록/요약
In this study, a CuFeO₂@CuO photocathode was modified with rGO (reduced graphene oxide) and PPy (polypyrrole), anticipating a combined effect of the material for selective photoelectrochemical CO₂reduction into liquid fuels at low external bias potential with BiVO4 photoanode. As a result, a bare CuFeO₂@CuO photocathode produced no fuels, but both rGO/CuFeO₂@CuO and PPy/rGO/CuFeO₂@CuO photocathodes generated formaldehyde and ethanol. Notably, while the rGO/CuFeO₂@CuO photocathode produced formaldehyde as a major product (~205.4 μM), on the other hand, PPy/rGO/CuFeO₂@CuO photocathode produced ethanol as a major product (273.2 μM). In addition, the ethanol production potential was changed from -0.3 V with rGO/CuFeO₂@CuO photocathode to -0.2 V with PPy/rGO/CuFeO₂@CuO photocathode. The changes on product selectivity and CO₂ reduction potentials can be attributed to the enhanced multi-electron transfer by rGO, and CO₂ activation by the complexation between PPy and CO₂ molecules.
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