کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6616065 | 459630 | 2013 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Discrete and dispersible hollow carbon spheres for PtRu electrocatalyst support in DMFCs
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Discrete and dispersible hollow carbon spheres for PtRu electrocatalyst support in DMFCs Discrete and dispersible hollow carbon spheres for PtRu electrocatalyst support in DMFCs](/preview/png/6616065.png)
چکیده انگلیسی
In this paper, discrete and highly dispersible hollow carbon spheres (HCSs) were prepared by using a confined nanospace pyrolysis method, in which the polystyrene latex particles were step-wisely coated with a phenol-formaldehyde polymer inner shell and a silica outer shell, and monodisperse HCSs were obtained after pyrolysis of this spherical composite and subsequent elimination of the outer silica shell. The electrocatalysts, PtRu nanoparticles supported on HCSs, were prepared by the impregnation and reduction method with sodium borohydride. Uniform and well-dispersed PtRu nanoparticles with a narrow particle size distribution were observed and depended on the total metal loadings. The electrooxidation of methanol on the supported catalysts was investigated at room temperature by electrochemical impedance spectroscopy, chronoamperometry, and cyclic voltammetry, and the results showed that the catalyst with PtRu loading of 15.75Â wt% possessed the highest catalytic activity than the other PtRu catalysts.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 109, 30 October 2013, Pages 238-244
Journal: Electrochimica Acta - Volume 109, 30 October 2013, Pages 238-244
نویسندگان
Pengcheng Liu, Duanguang Yang, Hongbiao Chen, Yong Gao, Huaming Li,