Materials Chemistry and Physics, Vol.186, 19-28, 2017
Catalytic activity of tungsten carbide-carbon (WC@C) core-shell structured for ethanol electro-oxidation
In this study, carbon coated WC (WC@C) was synthesized through solvothermal reactions in the presence of reducing agent magnesium (Mg) by employing tungsten oxide (WO3) as a precursor, acetone (C3H6O) as a carbon source. The formation of WC@C nano particles is confirmed by X-ray diffraction and Transmission electron microscopy. The thermal stability of the synthesized powder examined in air shows its stability up to 550 degrees C. In this method, in-situ produced outer carbon layer increase the surface area of materials which is 52.6 m(2) g(-1) with pore volume 0.213 cm(3) g(-1). The Electrocatalytic activity of ethanol oxidation on a synthesized sample with and without Pt nano particles have been investigated using cyclic voltammetry (CV). The CV results show the enhancement in oxidation stability of WC@C in acidic media as well as better CO-tolerance for ethanol oxidation after the deposition of Pt nano particles as compared to without Pt nano particles. (C) 2016 Published by Elsevier B.V.