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Issue 14, 2018
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A nanoporous metal phosphide catalyst for bifunctional water splitting

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Abstract

The development of high-performance earth-abundant bifunctional electrocatalysts for both the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is highly desirable, but remains a significant challenge. Herein, a type of content-controllable amorphous Ni–Fe–P catalyst with a bicontinuous nanostructure has been reported to be useful as a bifunctional electrocatalyst for overall water splitting. np-(NixFe1−x)4P5 is prepared simply by an electrochemical dealloying method. Owing to the bicontinuous nanostructure, amorphous atomic arrangement, metallic nature, and the substitution of Ni by Fe, np-(Ni0.67Fe0.33)4P5 exhibits excellent catalytic performance with the overpotentials of 245 mV and 120 mV at the current density of 10 mA cm−2 for OER and HER in 1 M KOH, respectively. Furthermore, the np-(Ni0.67Fe0.33)4P5 catalyst as both an anode and a cathode shows a high current density of 10 mA cm−2 at a low potential of 1.62 V in a two-electrode water electrolysis system with excellent stability for 20 h.

Graphical abstract: A nanoporous metal phosphide catalyst for bifunctional water splitting

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Publication details

The article was received on 19 Jan 2018, accepted on 28 Feb 2018 and first published on 01 Mar 2018


Article type: Communication
DOI: 10.1039/C8TA00622A
Citation: J. Mater. Chem. A, 2018,6, 5574-5579
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    A nanoporous metal phosphide catalyst for bifunctional water splitting

    W. Xu, S. Zhu, Y. Liang, Z. Cui, X. Yang and A. Inoue, J. Mater. Chem. A, 2018, 6, 5574
    DOI: 10.1039/C8TA00622A

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