Catalysis of hydrogen evolution reaction by Ni 12 P 5 single crystalline nanoplates and spherical nanoparticles

Elaborate design of highly active catalysts from earth-abundant elements is important for the development of water-splitting devices. We have synthesized {2̄ 1 1} high index-faceted Ni 12 P 5 nanoplates and Ni 12 P 5 spherical nanoparticles (SNPs) by the one-step solvothermal method. The Ni 12 P 5 nanoplates show enhanced hydrogen evolution reaction activity with a lower overpotential of −128 mV and a smaller Tafel slope of 60.6 mV dec −1 compared to Ni 12 P 5 SNPs. Stability tests reveal exceptional durability of the catalyst. This study offers an attractive catalytic material for large-scale hydrogen production technology.