Issue 35, 2024

A multifunctional MoS2/Ni9S8/NF catalyst for synchronous desulfurization and hydrogen evolution by a self-driven system

Abstract

Here, we introduce a self-driven system powered by a Zn–air battery to facilitate an electrocatalytic sulfide oxidation reaction coupled with a hydrogen evolution reaction (SOR‖HER), thereby achieving the simultaneous production of sulfur and hydrogen. A heterostructured MoS2/Ni9S8/NF rod-like nanoarray was synthesized via a simple hydrothermal method for use in this system. Experimental results reveal that the unique rod-like array structure and robust interface coupling effect not only improve catalyst conductivity and mass transfer but also facilitate electron redistribution to form high-valence nickel (Ni3+) and electron-rich metal–sulfur active centers. Consequently, the MoS2/Ni9S8/NF catalyst exhibits excellent activity (SOR: η100 = 0.311 V; HER: η100 = 0.134 V) and long stability (480 h) in both SOR and HER processes. A current density of 100 mA cm−2 can be achieved by applying only 0.674 V in the SOR‖HER system. Moreover, by integrating the Zn–air battery and SOR‖HER system, the self-driven system achieved an impressive hydrogen production rate of 5.50 mmol min−1 gcatalyst−1 and stable and efficient hydrogen production for up to ∼5000 min. In conclusion, this work establishes a self-driven system utilizing trifunctional catalysts for simultaneous hydrogen production and desulfurization, which is expected to achieve high economic efficiency, sustainable development, and environmental remediation.

Graphical abstract: A multifunctional MoS2/Ni9S8/NF catalyst for synchronous desulfurization and hydrogen evolution by a self-driven system

Supplementary files

Article information

Article type
Paper
Submitted
04 4 2024
Accepted
30 7 2024
First published
31 7 2024

J. Mater. Chem. A, 2024,12, 23732-23742

A multifunctional MoS2/Ni9S8/NF catalyst for synchronous desulfurization and hydrogen evolution by a self-driven system

X. Hao, K. Jiang, G. Liu, S. Zhou, D. Wang, Y. Zhang, T. Zhang, Y. Liu and P. Gu, J. Mater. Chem. A, 2024, 12, 23732 DOI: 10.1039/D4TA02268H

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