Abstract
Graphene-like materials have attracted significant attention as alternative catalyst carriers due to the broad possibilities of changing their shape, composition, and properties. In this study we investigated the structural and electrochemical characteristics of platinum electrocatalysts supported on reduced graphene oxide (rGO), including those modified with amine functionalities, nitrogen heteroatoms (rGO-Am), and oxygen enriched (rGO-O). Synthesis of Pt nanoparticles (20 wt.%) on the graphene-like nanomaterials surface was carried out using a modified polyol procedure. The Pt20/rGO-Am showed a lower Pt nanoparticles size together with high Pt utilization and EASA values compared to rGO-supported catalysts and the Pt/C reference sample due to the uniform distribution of nucleation centers on the surface of graphene nanoparticles, and the greater ability of these centers to electrically bond with platinum.
Highlights
Pt nanoparticles are well-dispersed with a transmission electron microscopy (TEM)-micrographs of Pt20/reduced graphene oxide (rGO), Pt20/rGO-O and Pt20/rGO-Am catalysts are shown on narrow distribution in the range ofis2–3 nm with an average
RGO-supported Pt the size distribution of Pt nanoparticles were performed
The aminated rGO synthesized in this study could be suggested as a promising
Summary
N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, 4, Kosygina St., HySA Infrastructure Center of Competence, Faculty of Engineering, North-West University, Potchefstroom 2531, South Africa. A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28, Vavilova St., Abstract: Graphene-like materials have attracted significant attention as alternative catalyst carriers due to the broad possibilities of changing their shape, composition, and properties. Synthesis of Pt nanoparticles (20 wt.%) on the graphene-like nanomaterials surface was carried out using a modified polyol procedure. The catalyst for the oxygen reduction reaction (ORR) (usually carbon-supported Pt nanoparticles [2]) is the main component of the membrane-electrode assembly (MEA) of PEMFC, which determines its performance, efficiency and durability [3]. The high specific surface area of catalysts based on Pt nanoparticles is achieved by using carbon carries [4]
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