Efficient oxidative hydrogen peroxide production and accumulation in photoelectrochemical water splitting using a tungsten trioxide/bismuth vanadate photoanode
Efficient oxidative hydrogen peroxide production and accumulation in photoelectrochemical water splitting using a tungsten trioxide/bismuth vanadate photoanode
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DOI：
10.1039/c6cc01605g
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发表时间：
2016-01-01
影响因子：
4.9
通讯作者：
Sayama, Kazuhiro
中科院分区：
文献类型：
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作者：
Fuku, Kojiro;Sayama, Kazuhiro
在模拟太阳光照下，即使施加电压远低于理论电解电压（+1.77 V vs. RHE），碳酸氢水溶液（HCO3-）也能促进水在WO3/BiVO4光阳极上氧化生成过氧化氢（H2O2），同时在Pt阴极上生成氢（H-2）。在2.0 M KHCO3低温条件下，H2O2和H-2同时高效生成和积累，H2O2的最大选择性达到54%左右，H2O2的累积浓度和周转量（TON）分别大于2 mM和108 mM。
An aqueous solution of hydrogen carbonate (HCO3-) facilitated oxidative hydrogen peroxide (H2O2) production fromwater on a WO3/BiVO4 photoanode with the simultaneous production of hydrogen (H-2) on a Pt cathode even at an applied voltage far lower than the theoretical electrolysis voltage (+1.77 V vs. RHE) under simulated solar light. The unprecedentedly efficient simultaneous production and accumulation of H2O2 and H-2 was achieved in 2.0 M KHCO3 at low temperature, and the maximum selectivity, accumulated concentration and turnover number (TON) of H2O2 generated reached ca. 54%, more than 2 mM and 108, respectively.