High-entropy sulfurization enables efficient non-noble metal-based NiCoFeCuS electrocatalyst for alkaline oxygen evolution reaction--颗粒学报PARTICUOLOGY

Yang, P., Sun, M., Wang, J., Li, J., Yang, R., Hao, Y., . . . Liu, X. (2024). High-entropy sulfurization enables efficient non-noble metal-based NiCoFeCuS electrocatalyst for alkaline oxygen evolution reaction. Particuology, 93, 180-185. https://doi.org/10.1016/j.partic.2024.06.014

High-entropy sulfurization enables efficient non-noble metal-based NiCoFeCuS electrocatalyst for alkaline oxygen evolution reaction

Pan Yang^{a 1}, Mengxiang Sun^{a b 1}, Jingchuan Wang^a, Jinfeng Li^a, Ruizhu Yang^c, Yawei Hao^a, Li Qi^b, Lijun Yang^a *, Xue Liu^c *

a Institute of Materials, China Academy of Engineering Physics, Jiangyou, 621908, China
b State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, China
c Science and Technology on Surface Physics and Chemistry Laboratory, Jiangyou, 621907, China

10.1016/j.partic.2024.06.014

Volume 93, October 2024, Pages 180-185

Received 23 May 2024, Revised 20 June 2024, Accepted 24 June 2024, Available online 2 July 2024, Version of Record 8 July 2024.

E-mail: sherry_yang0710@163.com; xueliuthu@126.com

Highlights

• NiCoFeCuS high-entropy electrocatalyst without any noble metals was prepared and applied in alkaline OER.

• Catalytic active sites are produced by electron density redistribution in high-entropy and sulfurization.

• NiCoFeCuS exhibits 261 mV overpotential and 57.97 mV dec⁻¹ Tafel slope @ 10 mA cm⁻², 88% of commercial RuO₂ only.

Abstract

Highly active and cost-effective oxygen evolution reaction electrocatalysts have become essential to replace commercial electrocatalysts that rely on rare noble metals. High-entropy sulfide nanomaterials, characterized by abundant randomly distributed elements and inherent stability, possess significant potential for applications. However, challenges such as uneven composition, partial oxidation, or imprecise synthesis control still remain in the materials preparation. Herein, a simple and effective two-step hydrothermal method was employed to synthesize NiCoFeCuS nanoparticles supported on foam nickel substrate. With the catalytic active sites produced by electron density redistribution in high-entropy and sulfurization, NiCoFeCuS exhibits excellent alkaline OER performance, with an overpotential of 261 mV and a Tafel slope of 57.97 mV dec⁻¹ at the current density of 10 mA cm⁻², which is only 88% of commercial RuO₂ without any noble metals.

Graphical abstract

Keywords

High-entropy; Sulfurization; NiCoFeCuS electrocatalyst; Oxygen evolution reaction; Overpotentials

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