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Construction of iron and oxygen co-doped nickel phosphide based on MOF derivatives for highly efficient and long-enduring water splitting

Abstract

The exploitation of high catalytic activity electrocatalysts with abundant earth reserves is the prerequisite for extensive hydrogen production from electrolyzed water. Herein, based on a feasible design idea, we fabricate iron and oxygen co-doped nickel phosphide ((Fe0.1Ni0.9)2P(O)) by phosphating metal-organic framework (MOF) derivatives propagated on nickel foam (NF) for efficient water splitting. In 1.0 M KOH, the (Fe0.1Ni0.9)2P(O)/NF electrode only requires overpotentials of 240 mV to reach 100 mA cm-2 for OER and 87 mV to reach 10 mA cm-2 for HER, respectively. Encouragingly, an alkaline electrolyzer assembled with the (Fe0.1Ni0.9)2P(O)/NF electrode can achieve a current density of 10 mA cm-2 at an extremely low voltage of 1.50 V, which is one of the lowest values currently achievable in non-precious metal electrocatalysts. Undoubtedly, this work provides a novel and practical strategy to synthesize highly efficient and durable electrocatalysts based on MOF derivatives for overall water splitting and other eletrocatalysis.

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Supplementary files

Article information


Submitted
12 Dec 2019
Accepted
23 Jan 2020
First published
25 Jan 2020

J. Mater. Chem. A, 2020, Accepted Manuscript
Article type
Paper

Construction of iron and oxygen co-doped nickel phosphide based on MOF derivatives for highly efficient and long-enduring water splitting

C. Lin, D. Wang, H. Jin, P. Wang, D. Chen, B. Liu and S. Mu, J. Mater. Chem. A, 2020, Accepted Manuscript , DOI: 10.1039/C9TA13583A

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