Catalysis of hydrogen evolution reaction by Ni12P5 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 {2̅ 1 1} high index-faceted Ni₁₂P₅ nanoplates and Ni₁₂P₅ spherical nanoparticles (SNPs) by the one-step solvothermal method. The Ni₁₂P₅ 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 Ni₁₂P₅ SNPs. Stability tests reveal exceptional durability of the catalyst. This study offers an attractive catalytic material for large-scale hydrogen production technology. [ABSTRACT FROM AUTHOR]