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Author

Lee, Jae Sung
Eco-friendly Catalysis and Energy Lab
Research Interests
  • Photocatalytic water splitting, artificial photosynthesis, fuel cells, heterogeneous catalysis

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A versatile photoanode-driven photoelectrochemical system for conversion of CO2 to fuels with high faradaic efficiencies at low bias potentials

Cited 2 times inthomson ciCited 2 times inthomson ci
Title
A versatile photoanode-driven photoelectrochemical system for conversion of CO2 to fuels with high faradaic efficiencies at low bias potentials
Author
Magesh, GanesanKim, Eun SunKang, Hyun JoonBanu, MarimuthuKim, Jae YulKim, Jin HyunLee, Jae Sung
Keywords
CARBON-DIOXIDE; ELECTROCHEMICAL REDUCTION; ROOM-TEMPERATURE; COPPER ELECTRODE; SEMICONDUCTOR; WATER; HYDROCARBONS; PHOSPHIDE; HYDROGEN; METHANOL
Issue Date
201402
Publisher
ROYAL SOC CHEMISTRY
Citation
JOURNAL OF MATERIALS CHEMISTRY A, v.2, no.7, pp.2044 - 2049
Abstract
A photoanode-driven photoelectrochemical system consisting of a WO 3 photoanode under bias potential and Cu or Sn/SnOx as the cathode for the reduction of CO2 has been studied under visible light irradiation. The bias potentials typically required for the onset of oxygen evolution current at the photoanode were sufficient for the efficient reduction of CO2 at the metallic/composite counter electrodes. Using Cu as a cathode electrocatalyst, faradaic efficiencies of 67% for CH4 and 71.6% for all carbon-containing products were achieved. With Sn/SnO x, a combined faradaic efficiency (CO + HCOOH) of 44.3% was obtained at +0.8 V. The 2-electrode potential between the counter electrode and working electrode for the WO3 driven system was less than the lowest bias potential reported so far for conventional photocathode-driven systems. The results demonstrate for the first time that the intrinsically more stable photoanode-driven systems could accomplish the reduction of CO2 with higher efficiencies relative to the conventional photocathode-driven systems.
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DOI
http://dx.doi.org/10.1039/c3ta14408a
ISSN
2050-7488
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