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

초록

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 costeffective, efficient solution for sustainable energy technologies.

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