Journal
NANO RESEARCH
Volume 10, Issue 9, Pages 3103-3112Publisher
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-017-1527-1
Keywords
oxygen evolution reaction; nickel phosphide; core/shell nanoparticles; interfacial coupling
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Funding
- National Natural Science Foundation of China [11674023, 51371015, 51331002, 51501004]
- Beijing Municipality Natural Science Foundation [2142018]
- Fundamental Research Funds for the Central Universities [FRF-BR-15-023A]
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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.
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