期刊
ACS APPLIED MATERIALS & INTERFACES
卷 8, 期 40, 页码 26690-26696出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b06520
关键词
C3N4-CoSe2; heterostructure; hydrogen evolution; photocathode; nanorod
资金
- Ministry of Science and Technology of Taiwan [MOST 104-2113-M-002-012-MY3, MOST 103-2112-M-003-009-MY3]
- Academia Sinica [AS-103-TPA06]
- National Taiwan University [104R7563-3]
An efficient H-2 evolution catalyst is developed by grafting CoSe2 nanorods into C3N4 nanosheets. The as-obtained C3N4-CoSe2 heterostructure can show excellent performance in H-2 evolution with outstanding durability. To generate phatocathode for photoelectrochemical water splitting CoSe2 grafted in C3N4 was decorated on the top of p-Si microwires (MWs). p-Si/C3N4-CoSe2 heterostructure can work as an efficient photocathode material for solar H-2 production in PEC water splitting. In 0.5 M H2SO4, p-Si/C3N4-CoSe2 can afford photocurrent density -4.89 mA/cm(2) at 0 V vs RHE and it can efficiently work for 3.5 h under visible light. Superior activity of C3N4-CoSe2 compared to CoSe2 toward H-2 evolution is explained with the help of impedance spectroscopy.
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