A facile synthesis and assembly of ultrasmall Pt nanoparticles on reduced graphene oxide‑carbon black hybrid for enhanced performance in PEMFC
Yılmaz, Melike Sevim and Yarar Kaplan, Begüm and Metin, Önder and Alkan Gürsel, Selmiye (2018) A facile synthesis and assembly of ultrasmall Pt nanoparticles on reduced graphene oxide‑carbon black hybrid for enhanced performance in PEMFC. Materials & Design, 151 . pp. 29-36. ISSN 0261-3069 (Print) 0264-1275 (Online)
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Official URL: http://dx.doi.org/10.1016/j.matdes.2018.04.041
A new and straightforwardapproach for the synthesis of ultrasmalland monodisperse Pt nanoparticles(NPs) andtheir controlled assembly on graphene based supports including reduced graphene oxide (rGO), commercial car-bon black (VC) and rGO-VC hybrid were reported. These supported NPs were utilized as the electrocatalysts forpolymer electrolyte membrane fuel cells (PEMFC). Surfactant-assisted reduction of platinum(II) acetylacetonatein hot organic solution yielded 1.2 nm Pt NPs. These ultrasmall Pt NPs were decorated on rGO, VC and the rGO-VChybrid by using a simple liquid-phase self-assembly method. In the previous studies on Pt/rGO-VC hybrids, onone 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 pre-pared Pt NPs were assembled on rGO-VC hybrid support. Pt/rGO-VC hybrid electrocatalyst possessed substan-tially 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.
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