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Issue 13, 2017
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Cation modulating electrocatalyst derived from bimetallic metal–organic frameworks for overall water splitting

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Abstract

Metal carbides with unique electrical properties and high catalytic efficiency have attracted tremendous interest for applications involving water electrolysis. In this paper the design of a novel cation modulating electrocatalyst Ni3ZnC0.7 using homogeneous bimetallic metal–organic frameworks (NiZn-MOFs) as precursor is reported. The synergistic effect between the unique chemical properties and nanostructure endows Ni3ZnC0.7 with a remarkable electrocatalytic performance. The balance of Ni(0) and Ni(II) achieved by Zn modulation is beneficial to both the hydrogen evolution reaction and the oxygen evolution reaction under alkaline conditions. The bifunctional catalyst, Ni3ZnC0.7, can drive overall water splitting through a symmetrical double electrode at a current density of 10 mA cm−2 with only 1.65 mV, and also shows excellent stability without obvious degradation after 24 h of operation, which makes it a promising noble metal free electrocatalyst. This easy preparation method for Ni3ZnC0.7 makes it a promising candidate for a practical answer to water splitting. Furthermore, this cation modulating strategy provides an ingenious way to realize the precise control of the catalysts and can be extended to the synthesis of various novel nanomaterials.

Graphical abstract: Cation modulating electrocatalyst derived from bimetallic metal–organic frameworks for overall water splitting

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Publication details

The article was received on 20 Jan 2017, accepted on 28 Feb 2017 and first published on 28 Feb 2017


Article type: Paper
DOI: 10.1039/C7TA00692F
Citation: J. Mater. Chem. A, 2017,5, 6170-6177
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    Cation modulating electrocatalyst derived from bimetallic metal–organic frameworks for overall water splitting

    Y. Wang, W. Wu, Y. Rao, Z. Li, N. Tsubaki and M. Wu, J. Mater. Chem. A, 2017, 5, 6170
    DOI: 10.1039/C7TA00692F

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