Journal
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
Volume 148, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jpcs.2020.109718
Keywords
Methanol oxidation reaction; Electrocatalyst; Reduced graphene oxide; Electrocatalytic activity; Nanocomposite
Funding
- Ministry of Higher Education of Malaysia under the Malaysia University Research Network [R.J130000.7851.4L880]
- Universiti Teknologi Malaysia Transdisciplinary Research Grant Scheme [Q. J130000.3551.06G88]
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This study successfully decorated palladium nanoparticles on reduced graphene oxide, demonstrating outstanding electrocatalytic activity towards methanol oxidation reaction in an acidic medium and remarkable stability. The new electrocatalyst offers a reasonable cost, clean, and facile synthesis approach.
Reduced graphene oxide (RGO) was successfully decorated with homogeneous highly dispersed palladium nanoparticles (PdNPs) by a novel single-step hydrothermal-assisted formic acid reduction reaction without the use of any surfactants. The structure, surface morphology, and elemental composition of the as-prepared PdNP-RGO electrocatalyst were extensively characterized. The PdNP-RGO electrocatalyst demonstrated outstanding electrocatalytic activity (8.65 mA/cm(2)) toward the methanol oxidation reaction (MOR) in an acidic medium that is 1.4 times higher than PdNP-decorated Vulcan XC72 (6.2 mA/cm(2)) and also comparable with that of Pd-based electrocatalysts in alkaline media from the previous reports. Furthermore, the as-prepared PdNP-RGO electrocatalyst also shows remarkable stability performance for the MOR in an acidic medium and thus offer new insights into the processing method of an outstanding electrocatalyst at the anode electrode in the direct methanol fuel cell with reasonable cost, clean and facile synthesis approach.
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