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Jang, Ji-Wook
JW Energy Lab
Research Interests
  • Materials Science, Energy

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Palladium oxide as a novel oxygen evolution catalyst on BiVO4 photoanode for photoelectrochemical water splitting

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Title
Palladium oxide as a novel oxygen evolution catalyst on BiVO4 photoanode for photoelectrochemical water splitting
Author
Kim, Jin HyunJang, Ji-WookKang, Hyun JoonMagesh, GanesanKim, Jae YoungKim, Ju HunLee, JinwooLee, Jae Sung
Keywords
Electrocatalyst; Palladium oxide; Photocatalyst; Surface charge separation
Issue Date
201408
Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
Citation
JOURNAL OF CATALYSIS, v.317, no., pp.126 - 134
Abstract
Various oxygen evolution electrocatalysts including cobalt phosphate, FeOOH, Ag+, and metal oxides MOx (M = Co, Mn, Ni, Cu, Rh, Ir, Ru, Pd) were loaded on BiVO4 photoanode for photoelectrochemical water splitting under simulated solar light. In all cases, the electocatalysts increased photocurrent generation and brought cathodic shifts of current onset potential. The screening test led to discovery of a novel PdOx-loaded BiVO4 electrode that showed the best performance in terms of fivefold increase in photocurrent, the largest onset potential shift, and dramatically improved stability, relative to bare BiVO4. To assess the role of the electrocatalyst in a quantitative way, photooxidation of sulfite ion was investigated as a sacrificial agent to obtain charge separation yields in the bulk and on the surface of BiVO4. The analysis clearly demonstrated that electrocatalysts reduced surface charge recombination with no effect on bulk recombination.
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DOI
http://dx.doi.org/10.1016/j.jcat.2014.06.015
ISSN
0021-9517
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