SrCuO2 Anchored on reduced graphene oxide: A robust and cost-effective electroactive catalyst for alkaline hydrogen evolution reaction (HER)

초록

This study effectively reported a SrCuO2/reduced graphene oxide (rGO) through a straightforward hydrothermal process and comprehensively assessed its efficacy as an electrocatalyst for HER in alkaline media. Physical, morphological, and surface investigations validated the identical distribution of SrCuO2 nanoparticles on rGO sheets, where the conductive graphene framework inhibited agglomeration and enhanced electron mobility. This implemented structure significantly enhanced the specific surface area (SSA), produced numerous electrochemically active sites, and enabled fast charge transfer during HER process. Electrochemical assessments demonstrated that the SrCuO2/rGO nanocomposite displayed enhanced HER activity relative to pure SrCuO2, attaining a reduced eta (184 mV) (-10 mA cm- 2) and Tafel slope (57 mV dec- 1), signifying accelerated reaction kinetics dictated by the Volmer-Heyrovsky mechanism. Moreover, SrCuO2/rGO exhibited remarkable stability, sustaining consistent performance for over 60 h during chronoamperometric testing and displaying minimal reduction after 3000 LSV cycles. The findings validate that the SrCuO2/rGO nanocomposite serves as a low-cost, durable, and remarkably effective electroactive catalyst, demonstrating significant potential for feasible and sustainable H2 creation in alkaline water-splitting systems.

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