PLATINUM-COBALT NANOCRYSTALS PREPARED UNDER DIFFERENT ATMOSPHERE FOR HIGH CATALYTIC PERFORMANCE OF THE METHANOL ELECTRO-OXIDATION

摘要

Bimetallic alloys of platinum and other transition metals are expected to substitute platinum owing to the superior catalytic performance and lower cost for methanol electro-oxidation1. Much attention has been paid on the influence of organic capping agents and metallic precursors, whereas, another significant factor of the synthesis atmosphere was less reported. Herein, we reported one-pot synthesis of Pt-Co alloys with cube, dendrite and sphere in a mixture of H2PtCl6, CoCl2?6H2O, PVP and glycine under air, H2 and N2 atmosphere respectively. It was shown that the synthesis condition of different atmosphere has significant effect on their structure and composition of Pt-Co nanocrystals. Pt-Co nanocrystals (NCs) with sphere prepared in N2 at 1 MPa exhibited superior electrocatalytic performance towards methanol oxidation reaction.