پیام رسان بله
The effect of manganese oxide on the performance of Pt/rGO in methanol electro-oxidation reaction
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:
IOI Code
:
XCAZ-EFGAK
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