Abstract
Hydrogen has emerged as a promising environmentally friendly energy source.The development of low-cost,highly active,stable,and easily synthesized catalysts for hydrogen evolution reactions(HER)re-mains a significant challenge.This study explored the synthesis of nitrogen-doped MXene-based compos-ite catalysts for enhanced HER performance.By thermally decomposing RuCl3 coordinated with melamine and formaldehyde resin,we successfully introduced nitrogen-doped carbon(N-C)with highly dispersed ruthenium(Ru)onto the MXene surface.The calcination temperature played a crucial role in controlling the size of Ru nanoparticles(Ru NPs)and the proportion of Ru single-atom(Ru SA),thereby facilitating the synergistic enhancement of HER performance by Ru NPs and Ru SA.The resulting catalyst prepared with a calcination temperature of 600 ℃,Ti3C2Tx-N/C-Ru-600(TNCR-600),exhibited exceptional HER ac-tivity(η10=17 mV)and stability(160 h)under alkaline conditions.This work presented a simple and effective strategy for synthesizing composite catalysts,offering new insights into the design and regula-tion of high-performance Ru-based catalysts for hydrogen production.
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