Au/Ni12P5 core/shell single-crystal nanoparticles as oxygen evolution reaction catalyst
oxygen evolution reaction, nickel phosphide, core/shell nanoparticles, interfacial coupling
ABSTRACT We have demonstrated the improved performance of oxygen evolution reactions (OER) using Au/nickel phosphide (Ni12P5) core/shell nanoparticles (NPs) under basic conditions. NPs with a Ni12P5 shell and a Au core, both of which have well-defined crystal structures, have been prepared using solution-based synthetic routes. Compared with pure Ni12P5 NPs and Au-Ni12P5 oligomer-like NPs, the core/shell crystalline structure with Au shows an improved OER activity. It affords a current density of 10 mA/cm2 at a small overpotential of 0.34 V, in 1 M KOH aqueous solution at room temperature. This enhanced OER activity may relate to the strong structural and effective electronic coupling between the single-crystal core and the shell.
Tsinghua University Press
Yingying Xu,Sibin Duan,Haoyi Li,Ming Yang,Shijie Wang,Xun Wang,Rongming Wang, Au/Ni12P5 core/shell single-crystal nanoparticles as oxygen evolution reaction catalyst. NanoRes.2017, 10(9): 3103–3112