Synthesis?Characterizations And Electrocatalysis Study Of Multiple Metal Nanocrystalline

Nowadays,fuel cells are cleaner and sustainable compared with other energy materials,but they still face many challenges in their commercial application,such as high cost,low activity and low reserves of the catalysts.Therefore,it is of great commercial significance to reduce the cost of catalyst and improve the activity of catalyst.It is well known that the morphology,size,structure and element distribution of nanocatalysts directly determine the electrocatalytic activity of nanocatalysts.This paper will be noble metals,platinum and palladium in combination with other non-noble metals?copper,cobalt and nickel?was prepared by hydrothermal method of multiple metal nanocatalyst,compared to pure,pure platinum nano palladium catalyst,multiple metal nano crystal catalyst not only has good catalytic activity,also reduced the amount of precious metals,platinum and palladium,reduces the production cost of the catalyst.1.Using N,N-dimethyl formamide and formaldehyde as mixed solvent,hexadecyl trimethyl ammonium bromide?CTAB?as the surfactant,glucose as structure oriented agents,Platinum?II?acetylacetonate and copper?II?acetylacetonate as metal precursor,the copper-rich octahedral Pt_34.5Cu_65.55.5 nanoparticles were successfully prepared the at 180?for 12 h by hydrothermal method.The nanoparticles showed excellent electrocatalytic performance for anodic methanol oxidation and cathode oxygen reduction in DMFC.2.Using ethylene glycol and ammonia as mixed solvent,polyvinylpyrrolidone?PVP?as a guide agent structure,Disodium tetrachloropalladate?Na₂PdCl₄?,copper chloride?CuCl₂?and cobalt chloride?CoCl₂?as a metal precursor,the dendritic Pd₅₉Cu₃₀Co₁₁1 nanocrystals successfully synthesized at 150?8 h by hydrothermal method.The mass activities of the dendritic Pd₅₉Cu₃₀Co₁₁1 nanoalloy toward oxygen reduction and formic acid oxidation are higher than those previously reported for non-platinum metal nanocatalysts.The Pd₅₉Cu₃₀Co₁₁1 nanoalloys also exhibit superior durability for oxygen reduction and formic acid oxidation as well as good antimethanol/ethanol interference ability compared to a commercial platinum/carbon catalyst.