Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 43, Issue 51, Pages 22807-22814Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2018.10.170
Keywords
Hematite photoanode; In-situ doping; Surface modification; CuBi2O4 photocathode; Photoelectrochemical water splitting
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Funding
- China Postdoctoral Science Foundation [2017M612451]
- National Natural Science Foundation of China [51572097, 51575217, 51702110]
- Yunnan MGI project [2018ZE017]
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Highly efficient water splitting reaction on hematite photoelectrode has been encumbered by its low photovoltage and photocurrent in a water splitting cell. in this work, a nanostructured hematite photoanode was prepared via a hydrothermal method, and its water oxidation activity was greatly enhanced by the synergetic application of uniform in-situ cobalt-doping and surface modification with fine cobalt iron oxide nanoparticles electrocatalyst. As a result, its remarkable low onset potential of 0.55 V-RHE for water oxidation allows the construction of tandem cell with a novel metal oxide photocathode CuBi2O4, which has already proven reasonably robust photoactivity for water reduction reaction. The photocurrent and long-term stability of this metal oxides based device in alkaline electrolyte for unassisted overall water splitting reaction were investigated. A solar to hydrogen efficiency of 0.15% was measured accordingly on this spontaneous hydrogen production device, without the involvement of precious metal components. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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