Synthesis of hybrid catalyst Co-Ni-MoS2 / RGO for the Hydrogen Production

L.H. Verastegui-Dominguez, N. Elizondo-Villarreal
Universidad Autonoma De Nuevo Leon,
Mexico

Keywords: hybrid catalyst, reduced graphene oxide, Ni-Co-MoS2, HER

Summary:

The urgent need of clean and renewable energy drives the exploration of effective strategies to produce molecular hydrogen. With the assistance of highly active non-noble metal electrocatalysts, electrolysis of water is becoming a promising candidate to generate pure hydrogen with low cost and high efficiency. An advanced catalyst for the electrochemical hydrogen evolution reaction (HER) should be reduce the overpotential and consequently increase the efficiency of this important electrochemical process. This approach has focused on enhancing the edge concentration to improve the performance of electrodes. One drawback of MoS2, catalysts in that the number of active sites in limited to edges. If MoS2 based catalysts are to realize their potentional, then there is a urgent need to increase the number of active sites, the activity of catalytic sites, and the electrical conmmunication between the active sites and the catalyst substrate. Optimization of charge transfer throught the utilization of a graphene support, for example, has demonstrated to substantially improve the kinetics of HER. Here we present the synthesis of Ni-Co-MoS2 in sheets of reduced graphene oxide (RGO) as a hybrid catalyst (Ni-Co-MoS2 / RGO) and demonstrate the catalysts activated as the active species for hydrodesulphurization for the electrocatalysis of HER.