Issue 28, 2023

Homogenizing of Pt on NiCu films for enhanced HER activity by two-step magneto-electrodeposition

Abstract

The efficient production of hydrogen through water electrolysis requires stable, high-performance and rather cost-effective electrocatalysts to promote the hydrogen evolution reaction (HER). Platinum (Pt) is known to be a benchmark electrocatalyst for the HER, but its high-cost is a major obstacle for large-scale applications. Therefore, reducing Pt loading on electrodes, with a minimal influence on the electrochemical performance is of significant importance. Here, we report on the effective utilization of Pt through a simple two-step magneto-electrodeposition synthesis method, leading to the formation of uniformly dispersed Pt/NiCu electrocatalysts with an excellent catalytic activity. Under optimum conditions, NiCu substrates are fabricated under a vertical static magnetic field of 0.5 T, followed by pulsed electrodeposition of Pt under the same magnetic field. The electrocatalyst (0.5 T NiCu + 0.5 T Pt) exhibits a high stability and superior HER activity, characterized by low overpotentials of 10.6, 54.6, and 87.8 mV obtained at current densities of 10, 100, and 200 mA cm−2, respectively, accompanied by a small Tafel slope of 13.4 mV dec−1 in alkaline media (1 M KOH). This work provides a new approach enabling the optimum utilization of Pt-based electrocatalysts employed for the HER.

Graphical abstract: Homogenizing of Pt on NiCu films for enhanced HER activity by two-step magneto-electrodeposition

Supplementary files

Article information

Article type
Paper
Submitted
28 mar 2023
Accepted
15 maj 2023
First published
26 maj 2023

New J. Chem., 2023,47, 13098-13105

Homogenizing of Pt on NiCu films for enhanced HER activity by two-step magneto-electrodeposition

D. Li, T. Shan, C. Liu, C. Zhao, A. Doherty, A. R. Kamali and Q. Wang, New J. Chem., 2023, 47, 13098 DOI: 10.1039/D3NJ01397A

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