Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/128784
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Type: Journal article
Title: A superaerophobic bimetallic selenides heterostructure for efficient industrial-level oxygen evolution at ultra-high current densities
Author: Yuan, J.
Cheng, X.
Wang, H.
Lei, C.
Pardiwala, S.
Yang, B.
Li, Z.
Zhang, Q.
Lei, L.
Wang, S.
Hou, Y.
Citation: Nano-Micro Letters, 2020; 12(1):1-12
Publisher: Springer
Issue Date: 2020
ISSN: 2311-6706
2150-5551
Statement of
Responsibility: 
Jiaxin Yuan, Xiaodi Cheng, Hanqing Wang, Chaojun Lei, Sameer Pardiwala ... Shaobin Wang ... et al.
Abstract: Cost-effective and stable electrocatalysts with ultra-high current densities for electrochemical oxygen evolution reaction (OER) are critical to the energy crisis and environmental pollution. Herein, we report a superaerophobic three dimensional (3D) heterostructured nanowrinkles of bimetallic selenides consisting of crystalline NiSe2 and NiFe2Se4 grown on NiFe alloy (NiSe2/NiFe2Se4@NiFe) prepared by a thermal selenization procedure. In this unique 3D heterostructure, numerous nanowrinkles of NiSe2/NiFe2Se4 hybrid with a thickness of ~ 100 nm are grown on NiFe alloy in a uniform manner. Profiting by the large active surface area and high electronic conductivity, the superaerophobic NiSe2/NiFe2Se4@NiFe heterostructure exhibits excellent electrocatalytic activity and durability towards OER in alkaline media, outputting the low potentials of 1.53 and 1.54 V to achieve ultra-high current densities of 500 and 1000 mA cm−2, respectively, which is among the most active Ni/Fe-based selenides, and even superior to the benchmark Ir/C catalyst. The in-situ derived FeOOH and NiOOH species from NiSe2/NiFe2Se4@NiFe are deemed to be efficient active sites for OER.
Keywords: Superaerophobicity; bimetallic selenide; heterostructure electrocatalyst; strong interfacial coupling; oxygen evolution reaction
Rights: © 2020, The Author(s). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
DOI: 10.1007/s40820-020-00442-0
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