Mixed-oxide-containing composite-supported MoPt with ultralow Pt content for accelerating hydrogen evolution performance

Abstract

The hybridization of MoPt with ultralow Pt content (2.81 wt%) on a rutile Ti_0.9Ir_0.1O₂–C composite (MoPt/Ti_0.9Ir_0.1O₂–C) is fabricated by a self-growth-assisted reduction route, serving as an efficient catalyst for the hydrogen evolution reaction (HER). Due to unique structural features, the MoPt/Ti_0.9Ir_0.1O₂–C catalyst requires an extremely low overpotential of 21.35 mV at 10 mA cm⁻² and an impressive HER mass activity of 849.36 mA mg_Metal⁻¹ at 300 mV overpotential. In addition, the as-made HER electrocatalyst shows superior catalytic stability and chemical after 10 h of testing.