Ru nanodendrites composed of ultrathin fcc/hcp nanoblades for the hydrogen evolution reaction in alkaline solutions

Ru nanodendrites composed of ultrathin fcc/hcp nanoblades were synthesized by a facile solvothermal reduction of Ru3+ together with Cu2+ followed by selective etching of Cu, resulting in a micro/mesoporous electrocatalyst that is highly efficient and stable for the hydrogen evolution reaction in alkaline media and outperformed commercial Pt/C at a lower cost.