| Authors | Ahmad Aryafar,Mehri- Saddat Ekrami Kakhki,Atena Naeimi |
|---|---|
| Journal | Scientific Reports |
| Page number | 3597-3609 |
| Serial number | 13 |
| IF | 4.259 |
| Paper Type | Full Paper |
| Published At | 2023 |
| Journal Type | Typographic |
| Journal Country | Iran, Islamic Republic Of |
| Journal Index | ISI،JCR،Scopus |
Abstract
In this work, tin (IV) oxide (SnO2) nanoparticles were synthesized based on Amaranthus spinosus plant.The produced graphene oxide by a modified Hummers’ method was functionalized with melamine (mRGO) and used accompanied by natural bentonite (Bnt) and extracted chitosan from shrimp wastes to prepare Bnt-mRGO-CH. This was utilized as novel support for anchoring Pt and SnO2 nanoparticles to prepare the novel Pt-SnO2/Bnt-mRGO-CH catalyst. The crystalline structure, morphology and uniform dispersion of nanoparticles in the prepared catalyst were determined by TEM images and XRD technique. The electrocatalytic performance of the Pt-SnO2/Bnt-mRGO-CH catalyst was evaluated for methanol electro-oxidation through electrochemical investigations including cyclic voltammetry, electrochemical impedance spectroscopy, and chronoamperometry techniques. Pt-SnO2/BntmRGO- CH showed enhanced catalytic activity compared to Pt/Bnt-mRGO-CH and Pt/Bnt-CH catalysts considering its higher electrochemically active surface area, higher mass activity, and better stability for methanol oxidation. SnO2/ Bnt-mRGO and Bnt-mRGO nanocomposites were also synthesized and did not show any significant activity for methanol oxidation. The results showed that Pt-SnO2/BntmRGO- CH could be a promising catalyst as anode material in direct methanol fuel cells