(221g) The Effect of Two Different Preparation Method of Cu@Pd/C in Direct Formic Acid Fuel Cell
The studies on the core-shell bimetallic catalysts have resulted in better fuel cell performances, and different electronic properties correspond to pure Pd. Among the Core-shell structure bimetallic catalysts Cu@Pd showed the better performance. However, there are lots of preparation methods to produce the Cu@Pd core-shell catalysts, and no one has compared them yet. In the present study, Cu@Pd/C were prepared by two different methods. Core-shell and skeleton structures of Cu@Pd/C nanoparticle samples were prepared with the average size of the 6.34± 0.74 nm and 6.17± 0.31 nm, respectively. XPS data illustrate that the Pd 3d5/2 shifts positively to higher binding energy, and the d-band center moves away from the Fermi level. Changing in the BE and d-band center shows that the electronic structure of the surfaces were modified which resulted in higher activity and stability than the Pd/C toward the FAO.