期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 45, 期 13, 页码 7552-7561出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2019.06.139
关键词
Ni(OH)(2) co-catalyst; Heterojunction; Solar hydrogen production; Charge transfer
资金
- SSN Institutions [8/542(0007)/18 EMR-1]
The synergistic effect of Ni(OH)(2) and CuxO on TiO2 enhanced the H-2 production 4 times higher than bare TiO2 at the optimum loading of 1.0 wt% Ni(OH)(2) and 0.5 wt% CuxO (1.0 wt% Ni(OH)(2)-CT) under natural sunlight. CuxO-TiO2 heterojunctions improved the visible activity and charge transfer efficiency of TiO2. The layered morphology of non-precious Ni(OH)(2) cocatalyst with intercalated H2O molecules enhanced H-2 production by improving the surface charge transfer reaction with additional formation of H+ ions through the redox reactions. Based on the characterization and experimental results, the double charge transfer and direct Z-scheme mechanisms were proposed for the charge carrier pathway in CuxO-TiO2 heterojunction. On the whole, the improved visible light response, efficient interfacial charge transfer and production of additional excited free electrons/H+ ions enhanced the overall H-2 production on Ni(OH)(2)-CT, which was also confirmed with various experimental and characterization results. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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