Wu Yifan
This work reports the preparation of a Pt/MoB electrocatalyst for hydrogen evolution reaction (HER) in acidic media via a facile etching and reduction method. MoB MBene was successfully synthesized by etching MoAlB with hydrofluoric acid, followed by loading Pt nanoparticles through chemical reduction. Structural characterizations confirm the layered morphology of MoB and uniform dispersion of metallic Pt on the support, with a strong metal-support interaction between Pt and MoB. Electrochemical tests in 0.5 M H2SO4 show that Pt/MoB exhibits overpotential of 69 mV at -10 mA·cm-2 and Tafel slope of 27 mV·dec-1, with activity comparable to Pt/Mo2C. The catalyst also displays excellent stability after 1000 CV cycles and 3000 s chronoamperometry measurement. This study demonstrates that MoB is a promising support for Pt-based electrocatalysts, providing a new strategy for designing efficient and stable HER catalysts.
Hydrogen evolution reaction; Pt/MoB electrocatalyst; Metal-support interaction; Electrochemical stability; Molybdenum boride