期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 275, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2020.119113
关键词
hematite nanorods; photoelectrocatalytic water splitting; photoanodes; water oxidation; carbon nanolayer
资金
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation (Chengdu University of Technology) [PLC20190702]
- National Natural Science Foundation of China [51902253, 91961106]
To improve the charge carrier transfer ability in the bulk and at the surface of alpha-Fe2O3 and accelerate the water oxidation kinetics at the photoanode/electrolyte interface, herein, starting with Ti-doped alpha-Fe2O3 nanorods, a nitrogen (N) doped carbon (C) nanolayer was coated on the surface of nanorods through a facile hydrothermal method, following a thermal treatment in Ar atmosphere. It was revealed that the N-doped C nanolayer, acting as the passivation layer and/or the water oxidation catalyst, could efficiently extract and collect photoexcited holes from the bulk of alpha-Fe2O3 and then inject them into the electrolyte for the accelerated water oxidation reaction, by inhibiting both the bulk and surface charge carrier recombination. As a result, the photocurrent density of Tidoped alpha-Fe2O3 nanorods coated with N doped C nanolayer was increased by similar to 2.7 folds at 1.8 V vs. RHE, as compared with the pristine one.
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