Well-defined PtNiCo core-shell nanodendrites with enhanced catalytic performance for methanol oxidation

摘要

To enhance the electrocatalytic performance for the methanol oxidation reaction (MOR), we have successfully synthesized well-defined PtNiCo core-shell nanodendrites with a high yield. The PtNiCo trimetallic nanocrystals present both a dendritic structure and individual elemental distribution composed of a Pt-Ni-Co core and dendritic Pt-Co bimetallic shell. In addition, the Pt/Ni/Co feeding molar ratio is critical for the growth of well-defined PtNiCo core-shell nanodendrites. Benefiting from their multiple structural features and synergetic effects among Pt, Ni and Co, the well-defined PtNiCo core-shell nanodendrites exhibit improved catalytic activity for the MOR compared to commercial Pt/C, state-of-the-art Pt-Ni and Pt-Co bimetallic nanoalloys, and other Pt-based nanodendrites. This research reveals opportunities for the rational design of trimetallic nanomaterials with enhanced catalytic performance.