Akademik Veri Yönetim Sistemi
ChemNanoMat, 2025 (SCI-Expanded)
Although transition metal dichalcogenide (TMD) catalysts have been widely studied, their large-scale production remains a challenge. In this study, a readily scalable and ubiquitous mechanochemical synthesis method, for the production of TMD nano catalysts, is developed. For the first time, the direct mechanochemical synthesis of MoS2 and MoSe2 nano catalysts from easily accessible elemental precursors (Mo, S and Se) is demonstrated. About 2 g of MoS2 and MoSe2 nano powder could be produced in a single batch with a yield of 94.3% and 90.9%, respectively. The synthesized catalysts are in the form of nanosheets whose thickness range from 5 to 10 layers and have a highly disordered structure that is coveted for catalysis applications. The MoS2 and MoSe2 nanosheets exhibit an excellent catalytic activity in hydrogen evolution reaction with an overpotential of 275 and 211 mV to deliver 100 mA cm−2 current density and a Tafel slope of 75 and 48 mV dec−1, respectively. Nearly amorphous structure of the nanosheets incorporating point defects and sulfur/selenium vacancies is the main contributing factor to the high catalytic activity. The proposed method can be implemented to the synthesis of other nano TMDs, fueling future research activity.