Enhanced the Hydrogen Evolution Performance by Ruthenium Nanoparticles Doped into Cobalt Phosphide Nanocages

The development of highly active and robust Pt-free catalysts is of great significance for electrocatalytic hydrogen production. Herein, we illustrate the design of Ru-doped cobalt phosphide nanocages as a high-efficiency electrocatalyst toward the hydrogen evolution reaction (HER) in acidic conditions. Remarkably, the composite shows excellent HER behavior with a low onset potential of 41 mV, a small Tafel slope of 54.7 mV dec–1 as well as good durability for 10 h. The enhanced catalytic activity for the HER could be assigned to the synergistic contribution of unique composition and structure of the hybrid catalyst. Consequently, this work offers a promising replacement for Pt-based nanomaterials for hydrogen generation from water-splitting.