Catalytic hydrogen evolution by molybdenum-based ternary metal sulfide nanoparticles

The search for highly active earth-abundant elements and nonexpensive catalysts for hydrogen evolution reaction is a vital and demanding task to minimize energy consumption. Transition metals incorporated into molybdenum sulfides are promising candidates for hydrogen evolution because of their unique chemical and physical properties. Here, we first describe a general strategy for the synthesis of particle-shaped molybdenum-based ternary refractory metal sulfides (MMoSx; M = Fe, Co, Ni, and Mn) through a simple hot-injection method. The newly developed materials are affirmed as valuable alternatives to noble-metal platinum because of their simple fabrication, inexpensiveness, and impressive catalytic performance. We present highly efficient catalysts for hydrogen evolution at a polarized water/1,2-dichloroethane interface by using decamethylferrocene (DMFc). The kinetics of hydrogen evolution studies are monitored by two-phase reactions using UV-vis spectroscopy and also further proven by gas chromotography. These ternary refractory metal sulfide catalysts show high catalytic activities upon hydrogen evolution comparable to platinum. The rate of hydrogen evolution for the MMoSx catalysts changed in the order Ni > Co > Fe > Mn according to the types of first-row transition metals.Firat University Scientific Research Projects Management Unit: 17201020 Türkiye Bilimler Akademisi Türkiye Bilimsel ve Teknolojik Araştirma Kurumu: 215M309The authors thank The Scientific and Technological Research Council of Turkey (Grant 215M309), UNESCO-Loreal for Woman in Science Program, Selcuk University Scientific Research Projects (Grant 17201020), and Turkish Academy of Sciences via a TUBA-GEBIP fellowship for supporting this work. This paper is part of the Ph.D. thesis prepared by E.A