Single crystalline noble metal nanocages are the most promising candidates for the heterogeneous catalysis due to their large specific surface area, well-defined structure and enhanced structure stability. Herein, based on the observation of the
unexpected phenomenon that the alloying of Pt and transition metal by co-reduction is more preferential than the formation of pure Pt NCs, we propose a feasible one-pot strategy to synthesize the well-epitaxial core-shell Pt-Ni structure with Ni-rich alloy as core and Pt-rich alloy as the shell. The as-prepared well-epitaxial Pt-Ni core-shell structures are subsequently etched into the monocrystalline Pt-Ni branched nanocages with the wall thickness being 2.8 nm. This unique structure exhibits excellent catalytic performance and stability for the hydrogen evolution reaction (HER) in the alkaline solution which is great significant for the energy-intensive water-alkali and chlor-alkali industry.
论文链接：https://www.nature.com/articles/ncomms15131
