MoS2@MWCNTs Core–shell heterostructure for enhanced oxygen evolution reaction in alkaline water electrolysis

This work reports the development of a MoS2@MWCNTs core–shell heterostructure synthesized through an optimized hydrothermal process, designed to enhance the Oxygen Evolution Reaction (OER) efficiency in alkaline water electrolysis. By employing continuous tumbling during synthesis, a uniform and pre...

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Bibliographic Details
Published in:Journal of environmental chemical engineering 2025-02, Vol.13 (1), Article 115060
Main Authors: Nguyen, Huu Thang, Jang, Kyu Yeon, Kim, Jingoo, Chae, Kimin, Bin Jung, Hye, Kim, MinJoong, Lee, Changsoo, Lee, Young-Woo, Jung, Kyu-Nam, Lee, Seung Woo, Cho, Hyun-Seok, Yoon, Hana, Cho, Younghyun
Format: Article
Language:English
Subjects:
Alkaline water electrolysis
Core–shell heterostructure
Hydrothermal synthesis
MoS2 catalyst
Oxygen evolution reaction
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Summary:This work reports the development of a MoS2@MWCNTs core–shell heterostructure synthesized through an optimized hydrothermal process, designed to enhance the Oxygen Evolution Reaction (OER) efficiency in alkaline water electrolysis. By employing continuous tumbling during synthesis, a uniform and precise thickness of MoS2 was grown on the MWCNTs, striking a balance between maximal catalytic activity at the MoS2 edges, and leveraging the high electrical conductivity of the MWCNTs. Additionally, polyvinylidene fluoride (PVDF) binder was optimized to ensure uniform coating and structural integrity, preventing material peeling while maintaining electrode material properties. The resulting MoS2@MWCNTs catalyst exhibited outstanding electrocatalytic performance for OER, with low overpotential of 285 mV at current density of 10 mA cm−2, Tafel slope of 42 mV dec−1, and exceptional durability, maintaining stable operation over 900 h. The catalyst's robust performance under dynamic conditions underscores its potential for green hydrogen production, offering a cost-effective, efficient solution for sustainable energy technologies. [Display omitted] •MoS2@MWCNTs core–shell heterostructures developed for OER enhancement.•A one-step hydrothermal method utilized with continuous tumbling•Low overpotential (285 mV) achieved at 10 mA cm⁻2 for OER.•Exceptional long-term stability demonstrated over 900 h.•Catalyst’s robust durability proved in dynamic and unstable operating conditions.
ISSN:2213-3437
DOI:10.1016/j.jece.2024.115060