RuP4 decorated CoP acacia-like array: An efficiently electrocatalyst for hydrogen evolution reaction at acidic and alkaline condition

The transition metal phosphate with lower price and rich abundance have a tendency to replace Pt-based catalytic materials for hydrogen evolution reaction (HER). Nevertheless, for transition metal phosphate based electrocatalyst, the further improvement of the electrocatalytic performance and the deep exploration of the regulation and control mechanism are still bottleneck problems. At present, we use a novel method to prepare the Ti foil supported the CoP acacia-like arrays decorated with RuP4 nanoparticles composite (RuP4@CoP/Ti). The obtained RuP4@CoP/Ti possesses excellent electrocatalytic performance, which needs the overpotential of 66.2 mV to reach the current of density of 10 mA cm(-2) and has the Tafel slope of 52.6 mV dec(-1) in 0.5 M H2SO4. In addition, it requires the overpotential of 36 mV to reach the current of density of 10 mA cm(-2) and has Tafel slope of 54.8 mV dec(-1) in 1 M KOH. Moreover, the obtained RuP4@CoP/Ti also presents outstanding long-term durability under either acidic or alkaline condition. The reason for such excellent properties is due to the unique acacia-like structure, the synergistic effect between CoP and RuP4, the existence of Ti foil and the introduction of Ru, which can optimize the electronic structure of Co and P.