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Title: High-index-faceted Ni3S2 branch arrays as bifunctional electrocatalysts for efficient water splitting
Authors: Wu, Jianbo
Wang, Xiuli
Deng, Shengjue
Zhang, Kaili
Xie, Dong
Zhang, Yongqi
Zhang, Yan
Wang, Yadong
Fan, Hong Jin
Xia, Xinhui
Tu, Jiangping
Keywords: Nickel Sulfide
Core/branch Arrays
Issue Date: 2019
Source: Deng, S., Zhang, K., Xie, D., Zhang, Y., Zhang, Y., Wang, Y., . . . Tu, J. (2019). High-Index-Faceted Ni3S2 Branch Arrays as Bifunctional Electrocatalysts for Efficient Water Splitting. Nano-Micro Letters, 11(1), 12-. doi:10.1007/s40820-019-0242-8
Series/Report no.: Nano-Micro Letters
Abstract: For efficient electrolysis of water for hydrogen generation or other value-added chemicals, it is highly relevant to develop low-temperature synthesis of low-cost and high-efficiency metal sulfide electrocatalysts on a large scale. Herein, we construct a new core–branch array and binder-free electrode by growing Ni3S2 nanoflake branches on an atomic-layer-deposited (ALD) TiO2 skeleton. Through induced growth on the ALD-TiO2 backbone, cross-linked Ni3S2 nanoflake branches with exposed { 2¯10 } high-index facets are uniformly anchored to the preformed TiO2 core forming an integrated electrocatalyst. Such a core–branch array structure possesses large active surface area, uniform porous structure, and rich active sites of the exposed { 2¯10 } high-index facet in the Ni3S2 nanoflake. Accordingly, the TiO2@Ni3S2 core/branch arrays exhibit remarkable electrocatalytic activities in an alkaline medium, with lower overpotentials for both oxygen evolution reaction (220 mV at 10 mA cm−2) and hydrogen evolution reaction (112 mV at 10 mA cm−2), which are better than those of other Ni3S2 counterparts. Stable overall water splitting based on this bifunctional electrolyzer is also demonstrated.
ISSN: 2311-6706
DOI: 10.1007/s40820-019-0242-8
Rights: © 2019 The Author(s). This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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