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Cubic SiC Photoanode Coupling with Ni:FeOOH Oxygen-Evolution Cocatalyst for Sustainable Photoelectrochemical Water Oxidation
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, Faculty of Science & Engineering.
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2019 (English)In: SOLAR RRL, ISSN 2367-198X, article id 1900364Article in journal (Refereed) Epub ahead of print
Abstract [en]

As an efficient water oxidation cocatalyst, the Earth-abundant nickel-iron oxyhydroxide (Ni:FeOOH) is introduced to coat on the cubic silicon carbide (3C-SiC) photoanode surface for improving the photoelectrochemical (PEC) water oxidation performance. The FeOOH is prepared on the 3C-SiC photoanode surface by hydrothermal deposition, followed by a photoassisted electrodeposition of NiOOH. It is shown that the Ni:FeOOH layer is composed of the beta-FeOOH nanorods with a conformal coating of the amorphous NiOOH. Under AM1.5G 100 mW cm(-2) illumination, the 3C-SiC/Ni:FeOOH photoanode exhibits a very low onset potential of 0.2 V versus reversible hydrogen electrode (V-RHE) and a high photocurrent density of 1.15 mA cm(-2) at 1.23 V-RHE, distinctly outperforming the 3C-SiC and the 3C-SiC/FeOOH counterparts. Open-circuit potential and impedance spectroscopy results demonstrate that the nanostructured Ni:FeOOH layer on the 3C-SiC surface increases the photovoltage and promotes the charge transfer toward the electrolyte, thus significantly improving the PEC water-splitting performance. These results provide new insights for the development of photoanodes toward efficient solar-fuel generation.

Place, publisher, year, edition, pages
WILEY-V C H VERLAG GMBH , 2019. article id 1900364
Keywords [en]
cubic silicon carbide; hydrothermal deposition; iron-nickel oxyhydroxide; photoanodes; photoelectrochemical water splitting
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Identifiers
URN: urn:nbn:se:liu:diva-161133DOI: 10.1002/solr.201900364ISI: 000489145200001OAI: oai:DiVA.org:liu-161133DiVA, id: diva2:1365802
Note

Funding Agencies|Swedish Research Council (Vetenskapsradet)Swedish Research Council [621-2014-5461, 2018-04670]; Swedish Research Council for Environment, Agricultural Sciences and Spatial Planning (FORMAS)Swedish Research Council Formas [2016-00559]; Swedish Foundation for International Cooperation in Research and Higher Education (STINT) [CH2016-6722]; AForsk foundation [16-399]; Stiftelsen Olle Engkvist ByggmastareSwedish Research Council [189-0243]

Available from: 2019-10-25 Created: 2019-10-25 Last updated: 2019-10-25

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Jian, JingxinShi, YuchenSyväjärvi, MikaelYakimova, RositsaSun, Jianwu
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