Selective CO Production by Au Coupled ZnTe/ZnO in the Photoelectrochemical CO2 Reduction System
- Authors
- Jang, Youn Jeong; Jang, Ji-Wook; Lee, Jaehyuk; Kim, Ju Hun; Kumagai, Hiromu; Lee, Jinwoo; Minegishi, Tsutomu; Kubota, Jun; Domen, Kazunari; Lee, Jae Sung
- Issue Date
- Nov-2015
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- ENERGY & ENVIRONMENTAL SCIENCE, v.8, no.12, pp.3597 - 3604
- Indexed
- SCIE
SCOPUS
- Journal Title
- ENERGY & ENVIRONMENTAL SCIENCE
- Volume
- 8
- Number
- 12
- Start Page
- 3597
- End Page
- 3604
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/155891
- DOI
- 10.1039/c5ee01445j
- ISSN
- 1754-5692
- Abstract
- A gold-coupled ZnTe/ZnO-nanowire array is a new photocathode for selective CO2 reduction to CO. At -0.7 V-RHE under simulated 1 sun illumination, its photocurrent (-16.0 mA cm(-2)) and incident photon-to-current conversion efficiency (97%) represent the highest among reported ZnTe photocathodes for CO2 reduction and dramatic enhancement from those of a bare electrode (-7.9 mA cm(-2), 68%). In addition, the Au nanoparticles convert mainly-hydrogen-producing bare ZnTe/ZnO-nanowires into mainly-CO-producing photocathodes in photoelectrochemical CO2 reduction. The remarkable effects of the Au co-catalyst originate from the formation of a Schottky junction with ZnTe to improve charge separation and to provide reaction centers for CO2 reduction suppressing competing water reduction.
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