Fuku Kojiro, Sayama Kazuhiro
Research Center for Photovoltaics (RCPV), National Institute of Advanced Industrial Science and Technology (AIST), Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan.
Chem Commun (Camb). 2016 Apr 7;52(31):5406-9. doi: 10.1039/c6cc01605g.
An aqueous solution of hydrogen carbonate (HCO3(-)) facilitated oxidative hydrogen peroxide (H2O2) production from water on a WO3/BiVO4 photoanode with the simultaneous production of hydrogen (H2) 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 H2 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.
碳酸氢根（HCO3(-)）的水溶液在模拟太阳光下，能促进WO3/BiVO4光阳极上由水产生氧化态过氧化氢（H2O2），同时在Pt阴极上产生氢气（H2），即使施加的电压远低于理论电解电压（相对于可逆氢电极+1.77 V）。在低温下于2.0 M碳酸氢钾中实现了H2O2和H2前所未有的高效同时产生和积累，所产生的H2O2的最大选择性、积累浓度和周转数（TON）分别达到约54%、超过2 mM和108。
