Au/Ni12P5 core/shell single-crystal nanoparticles as oxygen evolution reaction catalyst

作者：Xu, Yingying; Duan, Sibin; Li, Haoyi; Yang, Ming; Wang, Shijie; Wang, Xun; Wang, Rongming^*

来源：Nano Research, 2017, 10(9): 3103-3112.

DOI：10.1007/s12274-017-1527-1

• oxygen evolution reaction
• nickel phosphide
• core/shell nanoparticles
• interfacial coupling

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/cm(2) 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.

• 出版日期2017-9
• 单位北京科技大学; 清华大学