期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 44, 期 5, 页码 2446-2453出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2018.12.064
关键词
Metal organic frameworks (MOFs); Photoelectrocatalyst; Photoanaodes; Nanowires array; Photoelectrochemical water oxidation
资金
- One Hundred Talents Program of the Chinese Academy of Sciences
- National Natural Science Foundation of China [21601190, 21501173]
- Natural Science Foundation of Fujian Province [2014J05027]
- Science and Technology Planning Project of Fujian Province [2014H2008]
- Ministry of Science and Technology of the People's Republic of China [2016YBF0100100]
- strategic Priority Research Program CAS [XDB20000000]
Designing of high-performance photoanodes is essential for efficient solar energy conversion in photoelectrochemical (PEC) water splitting. Herein, we report an effective approach to synthesize three dimensional (3D) mixed-metal organic framework-coated ZnO nanowires array (ZnNi MOF@ZnO) for the effective PEC performance. The ZnO nanowires act as photon absorber as well as rapid charge transporter; whilst the ZnNi MOF provides the active sites for PEC process by lowering the energy barrier of water oxidation and suppressing electron-hole recombination. The 3D nanostructure of ZnNi MOF@ZnO nanowires array provides intimate interfacial contact through covalent interactions between the ZnNi MOF and ZnO nanowires which facilitates the rapid charge transfer during photocatalytic oxygen evolution reactions. As a result, the ZnNi MOF@ZnO nanowires array exhibited excellent photoelectrochemical water oxidation with very low onset potential (0.31 V vs. RHE) and high photocurrent density (1.40 mA/cm(2)) as compared to the Zn MOF@ZnO and ZnO nanowires array. This facile strategy provides a promising direction towards high performance photoanode design for adequate solar energy conversion. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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