Significance of an anion effect in the selective oxidation of Ce3+ to Ce4+ over a porous WO3 photoanode

Soichi Takasugi,Yugo Miseki,Kotaro Sasaki,Etsuko Fujita,Kazuhiro Sayama

doi:10.1016/j.electacta.2019.03.178

Significance of an anion effect in the selective oxidation of Ce3+ to Ce4+ over a porous WO3 photoanode

Soichi Takasugi, Yugo Miseki + Show 3 more

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https://doi.org/10.1016/j.electacta.2019.03.178

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Journal: Electrochimica Acta	Publication Date: Mar 28, 2019
Citations: 7	License type: publisher-specific-oa

Affiliation: National Institute of Advanced Industrial Science and Technology, Brookhaven National Laboratory

#High Concentration Of SO42 #Porous Photoanode + Show 8 more

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Abstract

Herein we report the oxidation of Ce3+ to Ce4+ using a porous WO3 photoanode and a Pt cathode with excellent Faradaic efficiency (FE (Ce4+)) of up to 98% under solar simulated light in an aqueous electrolyte solution containing a high concentration of SO42− anions. The competing side oxidative reactions such as S2O82− and O2 production were found to be suppressed in the presence of Ce3+. The Ce4+ yield (YI (Ce4+)) from Ce3+ reached up to 95%. Also, a noble-metal-free biomass-derived inexpensive electrode was found to be an efficient replacement of the Pt cathode.

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