Abstract
Graphene oxide and carbon nanotubes supported Pt nanoparticles were successfully synthesized by wet chemical reduction method. The structures and methanol oxidation performance of the two catalysts were characterized by scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD), Raman spectroscopy (Raman) and electrochemical workstation. The results show that graphene oxide supported Pt nanoparticles exhibits higher electrochemical active surface area, methanol oxidation activity and stability compared with carbon nanotubes. It is proposed that the well dispersed Pt on the graphene oxide plays an important role for the excellent performancefor methanol oxidation.
Highlights
Fuel cell is a kind of environment-friendly energy[1, 2], which is powered by renewable small molecular substances, such as hydrogen[3, 4], ethanol[2, 5], formic acid[6, 7], methanol
Graphene oxide (GO) and carbon nanotubes (CNTs) were used as carriers to systematically study the catalytic performance of Pt catalysts supported on different kind of carbon supports for methanol oxidation
The morphologies and microstructures of Pt/graphene oxide (GO) and Pt/CNTs catalysts were observed by scanning electron microscope (SEM) and transmission electron microscope (TEM) as shown in Fig. 1 and 2
Summary
Fuel cell is a kind of environment-friendly energy[1, 2], which is powered by renewable small molecular substances, such as hydrogen[3, 4], ethanol[2, 5], formic acid[6, 7], methanol. Methanol oxidation on the anodic surface of direct methanol fuel cell (DMFC) is a slow kinetic process, which involves multi-electron and multi-step elementary reactions[8,9,10]. For Pt/C catalysts, the structure or properties of the catalyst carrier directly determine the dispersion, coordination, crystal structure, electronic properties and interaction of the active components, affecting the activity of the catalytic reaction. In this experiment, graphene oxide (GO) and carbon nanotubes (CNTs) were used as carriers to systematically study the catalytic performance of Pt catalysts supported on different kind of carbon supports for methanol oxidation. The catalytic performance of the two catalysts for methanol oxidation were investigated by electrochemical methods
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