Efficient Photocatalytic Production of Hydrogen Peroxide from Water and Dioxygen with Bismuth Vanadate and a Cobalt(II) Chlorin Complex

Kentaro Mase, Masaki Yoneda, Yusuke Yamada, Shunichi Fukuzumi

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Abstract

Efficient photocatalytic production of H2O2 as a promising solar fuel from H2O and O2 in water has been achieved by the combination of bismuth vanadate (BiVO4) as a durable photocatalyst with a narrow band gap for the water oxidation and a cobalt chlorin complex (CoII(Ch)) as a selective electrocatalyst for the two-electron reduction of O2 in a two-compartment photoelectrochemical cell separated by a Nafion membrane under simulated solar light illumination. The concentration of H2O2 produced in the reaction solution of the cathode cell reached as high as 61 mM, when surface-modified BiVO4 with iron(III) oxide(hydroxide) (FeO(OH)) and CoII(Ch) were employed as a water oxidation catalyst in the photoanode and as an O2 reduction catalyst in the cathode, respectively. The highest solar energy conversion efficiency was determined to be 6.6% under simulated solar illumination adjusted to 0.05 sun after 1 h of photocatalytic reaction (0.89% under 1 sun illumination). The conversion of chemical energy into electric energy was conducted using H2O2 produced by photocatalytic reaction by an H2O2 fuel cell, where open-circuit potential and maximum power density were recorded as 0.79 V and 2.0 mW cm-2, respectively.

Original languageEnglish
Pages (from-to)913-919
Number of pages7
JournalACS Energy Letters
Volume1
Issue number5
DOIs
StatePublished - 11 Nov 2016

Bibliographical note

Funding Information:
This work was supported by an Advanced Low Carbon Technology Research and Development (ALCA) and SEN-TAN projects from Japan Science Technology Agency (JST) to S.F. and Grants-in-Aid (16H02268 to S.F. and 15K14223 to Y.Y.) for Scientific Research from Japan Society for the Promotion of Science (JSPS). K.M. gratefully acknowledges support from JSPS by Grant-in-Aid for JSPS fellowship for young scientists (No. 25-727).

Publisher Copyright:
© 2016 American Chemical Society.

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