Seawater usable for production and consumption of hydrogen peroxide as a solar fuel

Kentaro Mase, Masaki Yoneda, Yusuke Yamada and Shunichi Fukuzumi ()
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Kentaro Mase: Graduate School of Engineering, Osaka University, ALCA and SENTAN, Japan Science and Technology Agency (JST)
Masaki Yoneda: Graduate School of Engineering, Osaka University, ALCA and SENTAN, Japan Science and Technology Agency (JST)
Yusuke Yamada: Graduate School of Engineering, Osaka City University
Shunichi Fukuzumi: Graduate School of Engineering, Osaka University, ALCA and SENTAN, Japan Science and Technology Agency (JST)

Nature Communications, 2016, vol. 7, issue 1, 1-7

Abstract: Abstract Hydrogen peroxide (H2O2) in water has been proposed as a promising solar fuel instead of gaseous hydrogen because of advantages on easy storage and high energy density, being used as a fuel of a one-compartment H2O2 fuel cell for producing electricity on demand with emitting only dioxygen (O2) and water. It is highly desired to utilize the most earth-abundant seawater instead of precious pure water for the practical use of H2O2 as a solar fuel. Here we have achieved efficient photocatalytic production of H2O2 from the most earth-abundant seawater instead of precious pure water and O2 in a two-compartment photoelectrochemical cell using WO3 as a photocatalyst for water oxidation and a cobalt complex supported on a glassy-carbon substrate for the selective two-electron reduction of O2. The concentration of H2O2 produced in seawater reached 48 mM, which was high enough to operate an H2O2 fuel cell.

Date: 2016
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DOI: 10.1038/ncomms11470

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