An interconnected porous Au3Pt film on Ni foam: an efficient electrocatalyst for alkaline hydrogen evolution reaction

Abstract

Porous metal catalysts are considered as excellent catalysts for water electrolysis because of their large surface area, tunable pore size, abundant active sites and facilitated charge/mass transfer channels. Herein, a Au₃Pt alloy film with interconnected network pores was in situ grown on Ni foam (pAu₃Pt/NF) by a micelle-assisted replacement route. Benefiting from the interwoven network porous structure and bimetallic component, pAu₃Pt/NF exhibits remarkable electrocatalytic HER activity that delivers an overpotential of −40.1 mV at a current density of 50 mA cm⁻² with a Tafel slope of 42.3 mV dec⁻¹ in 1.0 M KOH electrolyte. The proposed strategy paves the way to the rational design of self-supporting interwoven network porous nanomaterials for high-efficiency water electrolysis and beyond.