Electrochemical and SECM Investigation of MoS₂/GO and MoS₂/rGO Nanocomposite Materials for HER Electrocatalysis.

ABSTRACT: Development of advanced materials for electrocatalytic and photocatalytic water splitting is the key in utilization of renewable energy. In the present work, we have synthesized MoS₂ nanoparticles embedded over the graphene oxide (GO) and reduced graphene oxide (rGO) layer for superior catalytic activity in the hydrogen evolution process (HER). The nanocomposite materials are characterized using different spectroscopic and microscopic measurements. A Tafel slope of ∼40 mV/decade suggested the Volmer-Heyrovsky mechanism for the HER process with MoS₂/GO composite as the catalyst, which indicated that electrochemical desorption of hydrogen is the rate-limiting step. The small Tafel slope indicates a promising electrocatalyst for HER in practical application. MoS₂

SUBMITTER: Kumar S 

PROVIDER: S-EPMC6645306 | biostudies-literature | 2017 Nov

REPOSITORIES: biostudies-literature