期刊
CATALYSTS
卷 8, 期 12, 页码 -出版社
MDPI
DOI: 10.3390/catal8120663
关键词
photoelectrochemical water splitting; oxygen evolution reaction; copper tungstate; bismuth vanadate; cobalt phosphate
资金
- National Natural Science Foundation of China [NSFC 51672017, 51872015, 51604310]
- Beijing Natural Science Foundation [2142020, 2151001]
- Open Foundation of State Key Laboratory of Environmental Protection for Iron and Steel Industry [2016YZC03]
A network structured CuWO4/BiVO4 nanocomposite with a high specific surface area was prepared from CuWO4 nanoflake (NF) arrays via a method that combined drop-casting and thermal annealing. The obtained CuWO4/BiVO4 exhibited high catalytic activity toward photoelectrochemical (PEC) water oxidation. When cobalt phosphate (Co-Pi) was coupled with CuWO4/BiVO4, the activity of the resulting CuWO4/BiVO4/Co-Pi composite for the oxygen evolution reaction (OER) was further improved. The photocurrent density (Jph) for OER on CuWO4/BiVO4/Co-Pi is among the highest reported on a CuWO4-based photoanode in a neutral solution. The high activity for the PEC OER was attributed to the high specific surface area of the composite, the formation of a CuWO4/BiVO4 heterojunction that accelerated electron-hole separation, and the coupling of the Co-Pi co-catalyst with CuWO4/BiVO4, which improved the charge transfer rate across composite/solution interface.
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