Abstract
The development of direct methanol fuel cell technology is one of the important ways to establish green energy production and conversion systems, while its large-scale commercial applications are severely hindered by the high cost and insufficient performance of current Pt-based anode catalysts. Here, we report the design and construction of a novel non-Pt electrocatalyst made from three-dimensional (3D) interconnected MoS2 nanosheet–reduced graphene oxide networks decorated with ultrafine Rh nanoparticles (Rh/MoS2-RGO) via a controllable co-assembly strategy. With unique structural features such as large specific surface areas, 3D interweaving porous frameworks, uniform Rh distribution, and excellent electron conductivity, the optimized Rh/MoS2-RGO catalyst is endowed with boosted electrocatalytic methanol oxidation properties, including a large electrochemical active surface area of 95.5 m2 g–1, a high mass (specific) activity of 1502.0 mA mg–1 (1.57 mA cm–2), and robust long-term stability, all of which significantly outperform those of reference Rh/RGO, Rh/carbon black, Rh/MoS2, as well as commercial Pt/carbon black and Pd/carbon black catalysts with the same metal content.
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