期刊
ACS APPLIED MATERIALS & INTERFACES
卷 13, 期 17, 页码 20313-20325出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c01900
关键词
photoelectrochemical water splitting; double perovskites; solar cells; earth abundant elements; bias-free water electrolysis; oxygen evolution reaction
资金
- Research Council of Norway [288320, 299736]
- Norwegian Center for Transmission Electron Microscopy, NORTEM [197405/F50]
A monolithic photovoltaic-assisted water electrolysis device using a double perovskite cobaltite catalyst and NiMo cathode has been demonstrated to achieve efficient water splitting in alkaline media, showing potential for full-scale applications.
Water photoelectrolysis has the potential to produce renewable hydrogen fuel, therefore addressing the intermittent nature of sunlight. Herein, a monolithic, photovoltaic ( PV)-assisted water electrolysis device of minimal engineering and of low (in the mu g range) noble-metal-free catalysts loading is presented for unassisted water splitting in alkaline media. An efficient double perovskite cobaltite catalyst, originally developed for high-temperature proton-conducting ceramic electrolyzers, possesses high activity for the oxygen evolution reaction in alkaline media at room temperatures too. Ba1-xGd1-yLax+yCo2O6-delta (BGLC) is combined with a NiMo cathode, and a solar-to-hydrogen efficiency of 6.6% in 1.0 M NaOH, under 1 sun simulated illumination for 71 h, is demonstrated. This work highlights how readily available earth-abundant materials and established PV methods can achieve high performance and stable and monolithic photoelectrolysis devices with potential for full-scale applications.
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