| Abstract: | The Pt/FeSnO(OH)_5 catalyst has been prepared by depositing Pt nanoparticles on the synthesized FeSnO(OH)_5 nanoboxes and demonstrates excellent performance towards methanol oxidation reaction(MOR) in direct methanol fuel cells(DMFCs).The Pt/FeSnO(OH)_5 catalyst exhibits a higher mass activity(1182.35 mA/mgPt) compared with Pt/C(594.57 mA/mgPt) catalysts.The X-ray powder diffraction,field emission scanning electron microscope,field emission transmission electron microscopy,X-ray photoelectron spectroscopy and electrochemical experiments have been employed to explore the relationships between the crystal structure and electrochemical properties.The increased activity and resistance of CO poisoning for Pt/FeSnO(OH)_5 catalyst can be attributed to the strong interaction between the transition metal in the hydroxide and Pt and the bifunctional effect.The higher relative concentration of Pt~0 in Pt/FeSnO(OH)_5 also contributes to the MOR activity.Moreover,the charge transfer resistance of Pt/FeSnO(OH)_5 is lower than that of Pt/C.Therefore,Pt/FeSnO(OH)_5 has great application prospect as a high-performance electrocatalyst in DMFCs. |
