کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
196072 | 459831 | 2007 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Homogeneous platinum deposition on chemically modified carbon nanostructures as catalysts for PEMFCs Homogeneous platinum deposition on chemically modified carbon nanostructures as catalysts for PEMFCs](/preview/png/196072.png)
Carbon nanostructures (CNS) with high specific surface and porosity prepared by high energy ball milling of graphite is considered as one of the potential alternatives to Vulcan as catalyst support for polymer electrolyte membrane fuel cells. Purification and functionalization of as-prepared CNS were carried out in a single-stage reflux with different proportions and concentrations of the oxidizing mixture, H2SO4 and HNO3. The density of the generated surface functional groups were investigated by XPS based on the activity of platinum dispersed on the specific sites of CNS. Cyclic voltammetry studies revealed that the electrochemical performance for some of the surface modified Pt/CNS were found to be similar to commercial ETEK® with 20 wt.% Pt supported on Vulcan XC-72 carbon black. XRD and HRTEM were also used to investigate the shape, size and distribution of Pt clusters on the functionalized surface of these CNS.
Journal: Electrochimica Acta - Volume 52, Issue 11, 1 March 2007, Pages 3751–3757