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Issue 14, 2017
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Al-Doped CoP nanoarray: a durable water-splitting electrocatalyst with superhigh activity

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Abstract

The scalable production of hydrogen fuel through electrochemical water reduction needs efficient Earth-abundant electrocatalysts to make the whole water-splitting process more energy efficient. In this Article, we report that an Al-doped CoP nanoarray on carbon cloth (Al-CoP/CC) behaves as a durable hydrogen evolution electrocatalyst with superhigh activity in 0.5 M H2SO4. It demands a pretty low overpotential of 23 mV to drive a geometrical catalytic current density of 10 mA cm−2, outperforming all reported non-precious metal catalysts. Density functional theory calculations reveal that Al-CoP has a more thermo-neutral hydrogen adsorption free energy than CoP. Notably, this Al-CoP/CC is also superior in activity and durability as a bifunctional catalyst for alkaline water electrolysis, and its two-electrode water electrolyser delivers 10 mA cm−2 water-splitting current at a cell voltage of 1.56 V in 1.0 M KOH. This work offers us an attractive cost-effective catalyst electrode in water-splitting devices for large-scale production of hydrogen fuels.

Graphical abstract: Al-Doped CoP nanoarray: a durable water-splitting electrocatalyst with superhigh activity

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Publication details

The article was received on 01 Feb 2017, accepted on 05 Mar 2017 and first published on 09 Mar 2017


Article type: Paper
DOI: 10.1039/C7NR00740J
Citation: Nanoscale, 2017,9, 4793-4800
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    Al-Doped CoP nanoarray: a durable water-splitting electrocatalyst with superhigh activity

    R. Zhang, C. Tang, R. Kong, G. Du, A. M. Asiri, L. Chen and X. Sun, Nanoscale, 2017, 9, 4793
    DOI: 10.1039/C7NR00740J

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