MoS2@MWCNTs Core–shell Heterostructure for Enhanced Oxygen Evolution
Reaction in Alkaline Water Electrolysis
Abstract
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. 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 hours.
Furthermore, the catalyst demonstrated robust performance under dynamic
and unstable operating conditions, highlighting its potential for
real-world applications in green hydrogen production. This study
showcases the successful application of a core–shell structure for OER
catalysis, while contributing to the advancement of sustainable energy
technologies by providing a cost-effective and efficient solution for
hydrogen production through water electrolysis.