Hyperbranched NixPy/NiCoP Arrays Based on Nickel Foam Electrode for Efficient and Stable Electrocatalytic Hydrogen Evolution

Transition metal phosphides have high catalytic performance and stability among non-precious metal electrocatalysts, particularly exhibiting good hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) performance in alkaline solutions, due to the platinum-like electronic structure of...

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Bibliographic Details
Published in:Electrocatalysis 2022, Vol.13 (5), p.611-621
Main Authors: Liu, Zhixin, Guo, Zhengang, Yang, Fasong, Liu, Zhifeng
Format: Article
Language:English
Subjects:
Catalysis
Chemistry
Chemistry and Materials Science
Electrical resistivity
Electrocatalysts
Electrochemistry
Electrodes
Electronic structure
Energy Systems
Hydrogen
Hydrogen evolution reactions
Hydrogen production
Metal foams
Nickel
Original Research
Oxygen evolution reactions
Phosphides
Physical Chemistry
Reaction kinetics
Synergistic effect
Synthesis
Transition metals
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Summary:Transition metal phosphides have high catalytic performance and stability among non-precious metal electrocatalysts, particularly exhibiting good hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) performance in alkaline solutions, due to the platinum-like electronic structure of transition metal phosphides. In this study, we successfully synthesized nickel phosphide and nickel cobalt phosphate hybrid on the three-dimensional nickel foam by a facile hydrothermal method. It is worth noting that the Ni x P y /NiCoP in 1 M KOH only needs the overpotential of 95 mV to reach the current density of 10 mA∙cm −2 for hydrogen evolution reaction (HER) and the overpotential of 231 mV at 10 mA∙cm −2 for oxygen evolution reaction (OER), which is superior to most electrocatalysts. The obtained results indicate that there is a synergistic effect between the three elements of Ni, Co, and P, facilitating the process of electrocatalysis. Meanwhile, the synthesized electrode not only has a large active surface area, but also good electrical conductivity, effectively facilitating the electrocatalytic reaction kinetics. Thus, this work provides an effective route to a low-cost, high-performance catalyst for electrocatalytic hydrogen production. Graphical abstract
ISSN:1868-2529
1868-5994
DOI:10.1007/s12678-022-00747-1