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Title: Light-driven water oxidation by a dye-sensitized photoanode with a chromophore/catalyst assembly on a mesoporous double-shell electrode

Journal Article · · Journal of Chemical Physics
DOI:https://doi.org/10.1063/1.5048780· OSTI ID:1566651
 [1];  [1];  [1];  [2];  [1]; ORCiD logo [1];  [3];  [4]; ORCiD logo [1]
  1. Univ. of North Carolina, Chapel Hill, NC (United States). Dept. of Chemistry
  2. Texas Christian Univ., Fort Worth, TX (United States). Dept. of Chemistry
  3. Univ. of North Carolina, Chapel Hill, NC (United States). Dept. of Chemistry; Tongji Univ., Shanghai (China)
  4. Univ. of North Carolina, Chapel Hill, NC (United States). Dept. of Chemistry; Zhengzou Univ., Henan (China). Dept. of Chemistry

A mesoporous atomic layer deposition (ALD) double-shell electrode, Al2O3 (insulating core)//ALD ZnO|ALD TiO2, on a fluorine-doped tin oxide (FTO) conducting substrate was explored for a photoanode assembly, FTO//Al2O3 (insulating core)//ALD ZnO|ALD TiO2|–chromophore–catalyst, for light-driven water oxidation. Photocurrent densities at photoanodes based on mesoporous ALD double-shell (ALD ZnO|ALD TiO2|) and ALD single-shell (ALD ZnO|, ALD TiO2|) electrodes were investigated for O2 evaluation by a generator–collector dual working electrode configuration. The high photocurrent densities obtained based on the mesoporous ALD ZnO|ALD TiO2 photoanode for O2 evolution arise from a significant barrier to back electron transfer (BET) by the optimized tunneling barrier in the structure with the built-in electric field at the ALD ZnO|ALD TiO2 interface. The charge recombination is thus largely decreased. Finally, in the films, BET following injection has been investigated through kinetic nanosecond transient absorption spectra, and the results of energy band analysis are used to derive insight into the internal electronic structure of the electrodes.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Alliance for Molecular PhotoElectrode Design for Solar Fuels (AMPED); University of North Carolina, Chapel Hill, NC (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0001011
OSTI ID:
1566651
Journal Information:
Journal of Chemical Physics, Vol. 150, Issue 4; ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 5 works
Citation information provided by
Web of Science

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  • Youngblood, W. Justin; Lee, Seung-Hyun Anna; Kobayashi, Yoji
  • Journal of the American Chemical Society, Vol. 131, Issue 3, p. 926-927 https://doi.org/10.1021/ja809108y
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