Research Article

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2018, 11(4): 2149–2158

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https://doi.org/10.1007/s12274-017-1832-8

3D mesoporous rose-like nickel-iron selenide microspheres as advanced electrocatalysts for the oxygen evolution reaction

Jiahao Yu1, Gongzhen Cheng1, and Wei Luo1,2 (*)

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1 College of Chemistry and Molecular Sciences, Wuhan University, Hubei 430072, China
2 Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, Tianjin 300071, China

Keywords: transition metal selenide, oxygen evolution reaction, NiFeSe, 3D, rose-like microspheres
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ABSTRACT The development of efficient and stable non-noble metal-based electrocatalysts for the oxygen evolution reaction (OER) is one of the essential challenges for the upcoming hydrogen economy. Herein, 3D mesoporous nickel iron selenide with rose-like microsphere architecture was directly grown on Ni foam via a successive two-step hydrothermal method. The unique 3D mesoporous rose-like morphology leads to a higher number of active sites as well as fast mass and electron transport through the entire electrode, and facilitates the release of O2 bubbles formed during the OER catalysis. As a result, the synthesized Ni0.76Fe0.24Se exhibits superior OER performances, with an ultralow overpotential of 197 mV needed to produce a current density of 10 mA·cm–2 in 1 M KOH, outperforming all transition metal selenide OER catalysts reported to date.
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3D mesoporous rose-like nickel-iron selenide microspheres as advanced electrocatalysts for the oxygen evolution reaction. Nano Res. 2018, 11(4): 2149–2158 https://doi.org/10.1007/s12274-017-1832-8

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