Issue 25, 2021

An Mn-doped NiCoP flower-like structure as a highly efficient electrocatalyst for hydrogen evolution reaction in acidic and alkaline solutions with long duration

Abstract

The exploration of efficient non-noble metal electrocatalysts for hydrogen evolution reaction has received considerable attention to replace commercial Pt catalyst. It is known that the cooperative coupling of appropriate non-noble metals exhibits excellent HER performance than a single component. Herein, an Mn-doped NiCoP flower-like electrocatalyst with self-assembled nanosheets on a nickel foam is synthesized via successive hydrothermal methods, followed by low temperature phosphidation. The as-synthesized Mn-NiCoP presents extraordinarily high catalytic activity and robust chemical stability towards the hydrogen evolution reaction in both acidic and alkaline electrolytes. Benefiting from the dual modulation of the morphology structure and chemical compositions, Mn-NiCoP/NF achieves a current density of 10 mA cm−2 at a low overpotential of 37 mV for HER in a 0.5 M H2SO4 solution. Moreover, it only requires overpotentials of 67 mV and 142 mV to deliver current densities of 10 mA cm−2 and 50 mA cm−2 in a 1 M KOH solution, respectively. Remarkably, it holds enhanced stability in 1 M KOH, maintaining HER activity for at least 120 h with negligible overpotential decay. The highly efficient and stable Mn-NiCoP electrocatalyst is valuable in applications relevant to energy storage.

Graphical abstract: An Mn-doped NiCoP flower-like structure as a highly efficient electrocatalyst for hydrogen evolution reaction in acidic and alkaline solutions with long duration

Supplementary files

Article information

Article type
Paper
Submitted
26 mar 2021
Accepted
01 jun 2021
First published
01 jun 2021

Nanoscale, 2021,13, 11069-11076

An Mn-doped NiCoP flower-like structure as a highly efficient electrocatalyst for hydrogen evolution reaction in acidic and alkaline solutions with long duration

X. Yu, S. Xu, Z. Wang, X. Cheng, Y. Du, G. Chen, X. Sun and Q. Wu, Nanoscale, 2021, 13, 11069 DOI: 10.1039/D1NR01913A

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