Design and development of highly efficient, inexpensive, and long-term stable electrocatalysts holds tremendous promise for hydrogen production through water electrolysis. In this context, a facile and scalable synthesis method was proposed for fabrication nanostructured electrocatalysts composed 3D graphene porous aerogels supported with MoS2 and WS2 under one step hydrothermal assembly. Further, thermal treatment at moderate conditions produces a highly interconnected macroporous network of thermally reduced and heteroatom doped GO having finely dispersed few-layered 2D MoS2 and WS2 nanosheets was observed. The strong synergistic effects between these 2D materials will guarantee a highly expanded surface, exposed catalytically active centers and continuous conductive network. The resulting nanohybrids were thoroughly investigated by means of several techniques. XRPD, HRTEM, SEM, Raman and BET have been applied to obtain information on the morphology and the structure of the nanohybrid as well as on the vibrational and spectroscopic properties. The resulting 3D assemblies exhibits enhanced electro-catalytic HER in both acidic and alkaline environments with higher activity and longer stability.

3D graphene aerogel supported MoS2 and WS2 heterostructures as high performance electrocatalysts

256th National Meeting (2018)

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