Electrocatalytic activity of Ag@Pt core-shell nanoparticles supported on graphene for effective anodic fuels electro-oxidation

Laleh Hosseinzadeh¹

1) Department of Chemistry, Dehloran Branch, Islamic Azad University, Dehloran, Ilam, Iran Email:

Publication : 13th Biennial Electrochemistry Seminar of Iran(elect13pguac.ir)
Abstract :
Recently, fuel cells as promising efficient energy sources for portable, stationary power generation and power for transportation have received significant attention. Direct fuel cells such as direct methanol fuel cells (DMFCs), direct ethanol fuel cells (DEFCs) and direct formic acid fuel cells (DFAFCs) as green energy sources have attracted great attention due to unique properties such as high energy density, low operating temperature, environmental compatibility, fast recharging and relatively simple instruments [1-3]. In this work, Bimetallic Ag@Pt core-shell nanoparticles supported on graphene nanosheets (Ag@Pt-GRs) was successfully synthesized by a facile stepwise method and used as novel desirable platform for effective catalytic electro-oxidation of ethanol, methanol in alkaline media and formic acid. The morphology and electrochemical properties of Ag@Pt-GRs nanocomposite were characterized by transmission electron microscopy, X-ray diffraction, chronoamperometry and cyclic voltammetry. Based on experimental results, Ag@Pt-GRs nanocomposite exhibits attractive electrocatalytic activity for the oxidation of formic acid, methanol and ethanol due to synergistic effect of Pt, Ag and graphene nanosheets. Ag@Pt-GRs nanocomposite possesses higher electrocatalytic activities in comparison to the Pt-GRs nanocomposite, which may be attributed to enhancing the usage of Pt due to the formation of core-shell structure. The proposed nanocomposite with good stability and high catalytic activity can be a promising catalyst for fuel cell application
Keywords : Electrocatalytic activity Ag@Pt core-shell nanoparticles graphene fuel cells