The effect of manganese oxide on the performance ‎of Pt/rGO in methanol electro-oxidation reaction

Amideddin Nouralishahi¹

1) College of Engineering, University of Tehran (UT), Iran- Email:

Publication : 2nd. International Congress on science & Engineering - paris(parisconf.com)
Abstract :
Abstract ‎ In the current research, electro-oxidation of methanol on platinum nanoparticles ‎supported on a nanocomposite of manganese oxide (MnOx) and reduced graphene ‎oxide (Pt/MnOx-rGO) is investigated. The graphene oxide nanosheets were ‎synthesized through modified Hummer’s method and the Pt nanoparticles is ‎dispersed on the supports through an impregnation method. The synthesized samples ‎are characterized using XRD and TEM techniques. The electro-catalytic properties ‎of electrodes are examined by cyclic voltammetry and chronoamperommetry ‎experiments. According to the electrochemical data, forward peak current density in ‎cyclic voltammetry is 1500.1 mA/mgPt for Pt/MnOx-rGO, that means 3.1 times ‎improvement upon manganese oxide incorporation to the support, compared to 482.2 ‎mA/mgPt in Pt/rGO. These data are in a good agreement with higher ‎electrochemical active surface area upon manganese oxide incorporation to the ‎support, 95.1 m2/mgPt compared to 32.2 m2/mgPt. Furthermore, in the presence of ‎manganese oxide nanoparticles, the Pt nanopartciles show superior stability in ‎chronoamperommetry experiment, which may be explained by accommodation of bi-‎functional mechanism as a result of MnOx addition into the support structure. ‎
Keywords : Methanol electro-oxidation reaction Direct methanol fuel cell Reduced graphene ‎oxide Manganese oxide Platinum.‎