Selective CO production by Au coupled ZnTe/ZnO in the photoelectrochemical CO2 reduction system
- Selective CO production by Au coupled ZnTe/ZnO in the photoelectrochemical CO2 reduction system
- Jang, YJ; Jang, JW; Lee, J; Kim, JH; Kumagai, H; Lee, J; Minegishi, T; Kubota, J; Domen, K; Lee, JS
- Date Issued
- ROYAL SOC CHEMISTRY
- 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.
- AQUEOUS CARBON-DIOXIDE; ELECTROCHEMICAL REDUCTION; GOLD NANOPARTICLES; METAL-ELECTRODES; WORK FUNCTION; THIN-FILMS; SOLAR-CELLS; EVAPORATION; PARTICLES; METHANOL
- Article Type
- ENERGY & ENVIRONMENTAL SCIENCE, vol. 8, no. 12, page. 3597 - 3604, 2015-01
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