Facile synthesis of well dispersed Pd nanoparticles on reduced graphene oxide for electrocatalytic oxidation of formic acid |
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| Authors: | Rahul Krishna Diana M Fernandes Adriana Marinoiu João Ventura Cristina Freire Elby Titus |
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| Affiliation: | 1. I3N Department of Physics, University of Aveiro, 3810-193, Aveiro, Portugal;2. Center for Mechanical Technology and Automation (TEMA), Department of Mechanical Engineering, University of Aveiro, Portugal;3. REQUIMTE/LAQV, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, 4169-007, Porto, Portugal;4. National R&D Institute for Cryogenics and Isotopic Technologies, ICIT Rm. Valcea, National Centre for Hydrogen and Fuel Cell, Romania;5. IFIMUP and IN – Institute of Nanoscience and Nanotechnology, and Department of Physics and Astronomy, Faculty of Sciences, University of Porto, 4169-007, Porto, Portugal |
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| Abstract: | In present study, we report a facile synthesis of crystalline, small size Pd nanoparticles (NPs) on reduced graphene oxide (RGO) abbreviated as Pd/RGO for electrocatalytic oxidation of formic acid (FA). Here, first graphene oxide (GO) was reduced by the green method using l-ascorbic acid and citric acid and further Pd NPs were decorated on RGO by a facile method without using any reducing agents. The reduction of GO to RGO and synthesis of Pd NPs was confirmed by the X-ray diffraction (XRD) and X-ray photoelectrons (XPS) techniques. Surface morphology of Pd/RGO nanocomposite was evaluated by the scanning electron microscopy (SEM) and transmission electron microscopy (TEM) techniques. The electrocatalytic behavior of Pd/RGO nanocomposite was tested by using of cyclic voltammetric (CV) technique for electro-oxidation of FA in mixed solution of 0.5 M HCOOH + 0.5 H2SO4 at RT. Results shows that the higher electrocatalytic activity of Pd/RGO nanocomposite compare to Pd NPs. |
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| Keywords: | Pd nanoparticles Reduced graphene oxide Formic acid Hydrogen energy |
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