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A nickel–borate–phosphate nanoarray for efficient and durable water oxidation under benign conditions

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Abstract

The development of earth-abundant electrocatalysts for efficient water oxidation under moderate conditions is highly desired but still a big challenge. In this communication, we demonstrate the topotactic conversion of a nickel phosphide nanoarray on carbon cloth into a nickel–borate–phosphate nanoarray (Ni–Bi–Pi/CC) by oxidative polarization in potassium borate water. When used as a 3D water oxidation catalyst, such Ni–Bi–Pi/CC shows high activity with a geometrical catalytic current density of 10 mA cm−2 at an overpotential of only 440 mV in 0.1 M K–Bi, rivaling the performances of the reported Ni-containing catalysts operated under benign conditions. Notably, this electrode also demonstrates strong long-term electrochemical durability with 100% Faradaic efficiency for oxygen evolution. All these features promise its use as an attractive low-cost catalyst electrode in water-splitting devices for mass production of hydrogen fuels under environmentally friendly conditions.

Graphical abstract: A nickel–borate–phosphate nanoarray for efficient and durable water oxidation under benign conditions

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Publication details

The article was received on 21 Dec 2016, accepted on 11 Mar 2017, published on 13 Mar 2017 and first published online on 13 Mar 2017


Article type: Research Article
DOI: 10.1039/C6QI00594B
Citation: Inorg. Chem. Front., 2017, Advance Article
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    A nickel–borate–phosphate nanoarray for efficient and durable water oxidation under benign conditions

    M. Ma, D. Liu, S. Hao, R. Kong, G. Du, A. M. Asiri, Y. Yao and X. Sun, Inorg. Chem. Front., 2017, Advance Article , DOI: 10.1039/C6QI00594B

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