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Self-supported 3D Nanoporous Ni/V2O3 Hybrid Nanoplate Assemblies for Highly Efficient Electrochemical Hydrogen Evolution

Abstract

Nickel-based non-noble-metal materials have emerged as promising catalysts for electrochemical hydrogen production in view of their attractive intrinsic activities, electrical properties and low cost. Exploring new candidates for further improving performances of nickel-based catalysts and understanding the structure-activity relationship are still necessary to reduce the overpotential of hydrogen evolution reaction (HER) thus advance their application in electrochemical water splitting. Herein, we developed a facile two-step self-templated strategy for fabricating three-dimensional (3D) nanoporous nickel/vanadium oxide (Ni/V2O3) nanoplate assembly as a new efficient catalyst for alkaline HER. It is found that by controllable annealing Ni-V-O assembly as single precursor Ni and V2O3 components are uniformly integrated in the nanoporous composite, showing synergistically enhancing effect on HER. The resulting 3D nanoporous structure not only makes numerous active sites accessible for HER but also supplies a conductive open network towards efficient electron/mass transport. Consequently, the nanoporous Ni/V2O3 nanoplate assembly exhibits excellent catalytic performance for alkaline HER in terms of a low overpotential of 61 mV at 10 mA cm-2 and a small Tafel slope of 79.7 mV dec-1 together with excellent long-term durability. These findings bring new insights to good design and construction of other highly-active catalysts for diverse applications.

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Publication details

The article was received on 08 Aug 2018, accepted on 10 Oct 2018 and first published on 12 Oct 2018


Article type: Paper
DOI: 10.1039/C8TA07701K
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Self-supported 3D Nanoporous Ni/V2O3 Hybrid Nanoplate Assemblies for Highly Efficient Electrochemical Hydrogen Evolution

    M. Ming, Y. Ma, Y. Zhang, L. Huang, L. Zhao, Y. Chen, X. Zhang, G. Fan and J. Hu, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA07701K

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