Issue 35, 2021

Supporting nickel on vanadium nitride for comparable hydrogen evolution performance to platinum in alkaline solution

Abstract

The hydrogen evolution reaction (HER) is an effective means to producing hydrogen from electrolytic water splitting. However the best-performing catalysts use expensive Pt-group metals. Cheaper non-precious metal alternatives have shown low activity as their mechanism of H2 formation (Volmer–Heyrovsky) leads to high overpotentials. Here, we report an outstanding HER catalyst (Ni/VN) highly dispersed nickel supported on vanadium nitride that matches the turnover frequency of the platinum on carbon (Pt/C) benchmark material. It is more durable than Pt/C in alkaline solution. Ni/VN follows the low-overpotential (Volmer–Tafel) mechanism of H2 formation, with a 43 mV overpotential at a current density of 10 mA cm−2. This value is even below that of Pt/C (57 mV). The support of VN enhances the dispersion of nickel, weakens the surface oxidation, decreases the hydrogen binding energy, and therefore significantly improves the HER catalysis. This result removes one of the major barriers for scalability of electrolytic water-splitting by demonstrating that nitride-based materials can match and even surpass the efficiency and durability of precious metal catalysts.

Graphical abstract: Supporting nickel on vanadium nitride for comparable hydrogen evolution performance to platinum in alkaline solution

Supplementary files

Article information

Article type
Communication
Submitted
02 Кві 2021
Accepted
26 Тра 2021
First published
27 Тра 2021

J. Mater. Chem. A, 2021,9, 19669-19674

Supporting nickel on vanadium nitride for comparable hydrogen evolution performance to platinum in alkaline solution

H. Shen, S. Liang, S. Adimi, X. Guo, Y. Zhu, H. Guo, T. Thomas, J. P. Attfield and M. Yang, J. Mater. Chem. A, 2021, 9, 19669 DOI: 10.1039/D1TA02760C

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