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In this study a series of PtRuCo/GR with the different molar ratios were prepared by microwave-assisted heating of the reaction mixture consisting of H2PtCl6, RuCl3, CoCl2 and ethylene glycol. The Transmission Electron Microscopy and Inductively Coupled Plasma Optical Emission Spectroscopy were employed to characterize the synthesized PtRuCo/GR catalysts. The electrocatalytic activity of the synthesized catalysts towards the oxidation of methanol was investigated by means of cyclic voltammetry and chronoamperometry. It was found that the PtRuCo/GR catalysts with the Pt:Ru:Co molar ratios equal to 1:2:2, 1:1.7:5.6 and 3.5:1:23 were prepared. The PtRuCo/GR catalyst with the Pt:Ru:Co molar ratio equal to 3.5:1:23 has a higher electrocatalytic activity towards the oxidation of methanol in acidic medium as compared with that of other synthesized catalysts.

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In this study the graphene supported PtRuCo catalysts were prepared with different Pt:Ru:Co molar ratios equal to 3.5:1:23, 1:1.7:5.6 and 1:2:2 by means of microwave synthesis. The shape and size of catalyst particles were examined using a Transmission Electron Microscopy. The catalytic activity of the graphene supported PtRuCo catalysts was evaluated with respect to the hydrolysis reaction of sodium borohydride by measuring the amount of generated hydrogen. It was found that highest rates of hydrogen generation were obtained at 60 oC and are 53.1, 82.8 and 71.1 L min-1 g-1 metal for the PtRuCo/GR catalysts with the Pt:Ru:Co molar ratios equal to 3.5:1:23, 1:1.7:5.6 and 1:2:2, respectively. The activation energy, determined from the kinetic data, is 50.2, 55.9 and 45.6 kJ mol-1 for PtRuCo/GR with the above mentioned Pt:Ru:Co molar ratios, indicating a high catalytic activity of the synthesized catalysts towards hydrolysis of sodium borohydride.

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