Heterostructure PtNi supported by Pd nanosheets high-performance catalysts for multifunctional fuel cell

Abstract

Platinum (Pt) based catalysts have multiphase structure, such as two-dimensional (2D) nanosheets structure, with a large specific surface area and high atomic utilization ratio, and a large contact area with carbon support, which promotes the combination of catalyst and support, and improves the activity of catalyst. However, there are still many difficulties in the synthesis of 2D polymetallic alloy nanosheet catalysts. Herein, we synthesized palladium nanosheets (Pd NSs) catalyst with smooth surface structure via solvothermal method, smooth surface structure palladium platinum nanosheets (PdPt NSs) and palladium platinum nickel island particle nanosheets (PdPtNi IPNSs) catalyst. Compared with commercial TKK-Pt/C, the prepared PdPtNi IPNSs catalyst has better catalytic performance for oxygen reduction reaction (ORR), ethanol oxidation reaction (EOR) and methanol oxidation reaction (MOR). This work provides a simple and feasible strategy for the synthesis of stable and efficient polymetallic 2D alloy nanostructured catalysts.