A facile synthesis and assembly of ultrasmall Pt nanoparticles on reduced graphene oxide‑carbon black hybrid for enhanced performance in PEMFC
| Autor: | Önder Metin, Selmiye Alkan Gürsel, Melike Sevim Yılmaz, Begüm Yarar Kaplan |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Oxide Proton exchange membrane fuel cell chemistry.chemical_element 02 engineering and technology Electrolyte 010402 general chemistry Electrocatalyst 01 natural sciences Catalysis law.invention chemistry.chemical_compound law lcsh:TA401-492 General Materials Science Graphene Mechanical Engineering Carbon black 021001 nanoscience & nanotechnology 0104 chemical sciences Chemical engineering chemistry Mechanics of Materials lcsh:Materials of engineering and construction. Mechanics of materials 0210 nano-technology Platinum |
| Zdroj: | Materials & Design, Vol 151, Iss, Pp 29-36 (2018) |
| ISSN: | 0264-1275 |
| Popis: | A new and straightforward approach for the synthesis of ultrasmall and monodisperse Pt nanoparticles (NPs) and their controlled assembly on graphene based supports including reduced graphene oxide (rGO), commercial carbon black (VC) and rGO-VC hybrid were reported. These supported NPs were utilized as the electrocatalysts for polymer electrolyte membrane fuel cells (PEMFC). Surfactant-assisted reduction of platinum(II) acetylacetonate in hot organic solution yielded 1.2 nm Pt NPs. These ultrasmall Pt NPs were decorated on rGO, VC and the rGO-VC hybrid by using a simple liquid-phase self-assembly method. In the previous studies on Pt/rGO-VC hybrids, on one hand, Pt NPs were synthesized in situ on support, on the other hand, VC was added to synthesized Pt/rGO, and their fuel cell performance have been rarely shown. In our study, rGO and VC were directly mixed and prepared Pt NPs were assembled on rGO-VC hybrid support. Pt/rGO-VC hybrid electrocatalyst possessed substantially better electrocatalytic activity owing to better utilization of Pt compared to Pt/rGO and Pt/VC. Membrane electrode assemblies based on resultant catalysts were characterized in-situ in PEMFC. A superior PEMFC performance of 857 mW cm−2 (maximum power density) was achieved with the hybrid catalyst as compared to Pt NPs supported on rGO or VC. Keywords: Nanocatalyst, Platinum, Polymer electrolyte membrane fuel cell, Hybrid support, Reduced graphene oxide |
| Databáze: | OpenAIRE |
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