Citation:
Zhifeng Liu, Xue Lu. Multifarious function layers photoanode based on g-C3N4 for photoelectrochemical water splitting[J]. Chinese Journal of Catalysis,
;2018, 39(9): 1527-1533.
doi:
10.1016/S1872-2067(18)63079-7
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We report on a novel g-C3N4/TiO2/Co-Pi photoanode combining a TiO2 protection layer, Co-Pi hole capture layer, and g-C3N4 light-absorption layer layer for photoelectrochemical (PEC) water splitting to generate hydrogen for the first time. This new photoanode with three function layers exhibits enhanced PEC performance with a photocurrent density of 0.346 mA·cm-2 at 1.1 V (vs. RHE), which is approximately 3.6 times that of pure g-C3N4 photoanode. The enhanced PEC performance of g-C3N4/TiO2/Co-Pi photoanode benefits from the following:(1) excellent visible light absorption of g-C3N4; (2) stable protection of TiO2 to improve the durability of g-C3N4film; and (3)photogenerated holes capture Co-Pi to separate photogenerated electron-hole pairs efficiently. This promising multifarious function layers structure provides a new perspective for PEC water splitting to generate hydrogen.
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Keywords:
- g-C3N4,
- TiO2,
- Co-Pi,
- Photoanode,
- Photoelectrochemical water splitting
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