Journal
CHINESE JOURNAL OF CATALYSIS
Volume 39, Issue 9, Pages 1527-1533Publisher
SCIENCE PRESS
DOI: 10.1016/S1872-2067(18)63079-7
Keywords
g-C3N4; TiO2; Co-Pi; Photoanode; Photoelectrochemical water splitting
Funding
- Science Funds of Tianjin for Distinguished Young Scholar [17JCJQJC44800]
- Natural Science Foundation of Tianjin [16JCYBJC17900]
- Open Foundation of Hubei Collaborative Innovation Center for High-efficient Utilization of Solar Energy [HBSKFZD2017001]
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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-C(3)N(4)film; 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. (C) 2018, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
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