Mase Kentaro, Yoneda Masaki, Yamada Yusuke, Fukuzumi Shunichi
Department of Material and Life Science, Graduate School of Engineering, Osaka University, ALCA and SENTAN, Japan Science and Technology Agency (JST), Suita, Osaka 565-0871, Japan.
Department of Applied Chemistry and Bioengineering, Graduate School of Engineering, Osaka City University, Osaka 558-8585, Japan.
Nat Commun. 2016 May 4;7:11470. doi: 10.1038/ncomms11470.
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.
由于易于储存和高能量密度等优点，水中的过氧化氢（H₂O₂）已被提议作为一种有前景的太阳能燃料，而非气态氢，它被用作单室H₂O₂燃料电池的燃料，用于按需发电，仅排放氧气（O₂）和水。为了将H₂O₂实际用作太阳能燃料，非常希望利用地球上储量丰富的海水而非珍贵的纯水。在此，我们在双室光电化学电池中，以WO₃作为水氧化的光催化剂，以负载在玻碳基底上的钴配合物用于O₂的选择性双电子还原，实现了从地球上储量丰富的海水而非珍贵的纯水和O₂高效光催化生产H₂O₂。海水中产生的H₂O₂浓度达到48 mM，这足以驱动一个H₂O₂燃料电池。
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