کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1273119 | 1497608 | 2010 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Synthesis and characterization of colloidal platinum nanoparticles for electrochemical applications Synthesis and characterization of colloidal platinum nanoparticles for electrochemical applications](/preview/png/1273119.png)
Platinum colloidal nanoparticles were synthesized by chemical reduction of metallic salts in presence of poly (N-vinyl-2-pirrolidone) which served as a protecting agent. The preparation conditions for obtaining Pt nanoparticles were established by analyzing TEM and HRTEM images of the samples. Size of the synthesized Pt nanoparticles was in the range 2.5 to 8.5 nm depending on the molarity of PtCl4 used to prepare the colloidal dispersion. The electrochemical characteristics of the Pt nanoparticles supported on carbon were investigated by analyzing their catalytic response to the oxygen reduction reaction (ORR). The reactivity of the prepared catalyst was comparable to that of the commercially available carbon supported Pt for the ORR. Catalytic parameters like charge transfer coefficient, Tafel constants and exchange current density were calculated for the prepared catalyst.
Journal: International Journal of Hydrogen Energy - Volume 35, Issue 9, May 2010, Pages 4215–4221