Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/105547
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
DRNTU::Science::Chemistry
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.
URI: https://hdl.handle.net/10356/105547
http://hdl.handle.net/10220/47822
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 (http://creativecommons.org/licenses/by/4.0/), 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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