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dc.contributor.authorCheng, Xiaodi
dc.contributor.authorLei, Chaojun
dc.contributor.authorYang, Jian
dc.contributor.authorYang, Bin
dc.contributor.authorLi, Zhongjian
dc.contributor.authorLu, Jianguo
dc.contributor.authorZhang, Xingwang
dc.contributor.authorLei, Lecheng
dc.contributor.authorHou, Yang
dc.contributor.authorOstrikov, Kostya Ken
dc.description.abstractNonprecious water oxidation electrocatalysts that perform well at high current densities are among the key enabling drivers of renewable energy technologies. Herein, we report a novel strategy to produce 3D ultrasmall zero-valent iron-coupled nickel sulfides nanosheets (Fe0−NixSy) hybrid on self-supported conductive Ni foam (denoted as Fe0−NixSy/NF) through a robust single-step gas–solid reaction. In this 3D hybrid, the Fe0−NixSy nanosheets with a length of approximately 400 nm and an average thickness of 33 nm are uniformly grown on the Ni foam. Benefiting from the unique 3D hierarchical structure and synergistic effect between Fe0 and NixSy, the 3D Fe0−NixSy/NF hybrid shows an excellent electrocatalytic activity towards oxygen evolution reaction (OER) at extremely high current densities in basic media. The current densities of 1000 and 1500 mA cm−2 are achieved at low potentials of 1.57 and 1.60 V, respectively, thus meeting the expected OER standards for industrial applications. These overpotentials of the 3D Fe0−NixSy/NF hybrid are the lowest among all previously reported nickel-sulfide-based electrocatalysts, and are even superior compared to state-of-the-art Ir/C catalysts. We further demonstrate that the integration of the 3D Fe0−NixSy/NF electrocatalyst as both anode and cathode with a silicon photovoltaic cell enables highly active and sustainable solar-driven overall water splitting.
dc.publisherWiley Blackwell
dc.subject.fieldofresearchAnalytical Chemistry
dc.subject.fieldofresearchPhysical Chemistry (incl. Structural)
dc.subject.fieldofresearchOther Chemical Sciences
dc.subject.keywordsScience & Technology
dc.subject.keywordsPhysical Sciences
dc.subject.keywords3D hybrid
dc.subject.keywordshigh current density
dc.titleEfficient Electrocatalytic Oxygen Evolution at Extremely High Current Density over 3D Ultrasmall Zero-Valent Iron-Coupled Nickel Sulfide Nanosheets
dc.typeJournal article
dc.type.descriptionC1 - Articles
dcterms.bibliographicCitationCheng, X; Lei, C; Yang, J; Yang, B; Li, Z; Lu, J; Zhang, X; Lei, L; Hou, Y; Ostrikov, KK, Efficient Electrocatalytic Oxygen Evolution at Extremely High Current Density over 3D Ultrasmall Zero-Valent Iron-Coupled Nickel Sulfide Nanosheets, ChemElectroChem, 2018, 5 (24), pp. 3866-3872
gro.hasfulltextNo Full Text
gro.griffith.authorOstrikov, Kostya (Ken)

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