期刊
ACS ENERGY LETTERS
卷 1, 期 5, 页码 913-919出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.6b00415
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资金
- Advanced Low Carbon Technology Research and Development (ALCA) project from Japan Science Technology Agency (JST)
- SENTAN project from Japan Science Technology Agency (JST)
- Japan Society for the Promotion of Science (JSPS) [16H02268, 15K14223]
- JSPS [25-727]
- Grants-in-Aid for Scientific Research [15K14223, 16H02268] Funding Source: KAKEN
Efficient photocatalytic production of H2O2 as a promising solar fuel from H2O and O-2 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 (Co-II(Ch)) as a selective electrocatalyst for the two-electron reduction of O-2 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 Co-II(Ch) were employed as a water oxidation catalyst in the photoanode and as an 02 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 I sun illumination). The conversion of chemical energy into electric energy was conducted using H2O2 produced by photocatalytic reaction by an 11202 fuel cell, where open-circuit potential and maximum power density were recorded as 0.79 V and 2.0 mW cm(-2), respectively.
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