کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
189363 | 459678 | 2012 | 6 صفحه PDF | دانلود رایگان |
Poly(diallyldimethylammonium chloride) (PDDA)-functionalized graphene nanosheets (GNSs) were employed for direct methanol fuel cell applications. PDDA-functionalized GNSs (PDDA-GNSs) distributed positive charges on the surfaces of GNSs, favoring electrostatic self-assembly of negatively charged PtCl62− ions on the PDDA-GNSs. Subsequent reduction process was conducted using ethylene glycol, resulting in uniformly deposited Pt nanoparticles on PDDA-GNSs. Carbon black was functionalized by PDDA as well using a similar process, and the composite was denoted as PDDA-C. Experiments on Pt nanoparticles deposited on PDDA-C and GNSs were performed in the same manner as well. Pt electrocatalysts supported on the PDDA-GNSs exhibited higher electro-catalytic activity for the electro-oxidation of methanol compared with both Pt supported on the GNSs and PDDA-C. Therefore, PDDA-GNS can be an ideal support for Pt in direct methanol fuel cells.
Journal: Electrochimica Acta - Volume 59, 1 January 2012, Pages 429–434