کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7739867 | 1497990 | 2013 | 39 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Fabrication of highly porous platinum electrodes for micro-scale applications by pulsed electrodeposition and dealloying
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Fabrication of highly porous platinum electrodes for micro-scale applications by pulsed electrodeposition and dealloying Fabrication of highly porous platinum electrodes for micro-scale applications by pulsed electrodeposition and dealloying](/preview/png/7739867.png)
چکیده انگلیسی
We present the implementation and optimization of a novel electrodeposition method for the fabrication of highly porous platinum electrodes. It is based on the co-deposition of platinum and copper and the selective dealloying of copper in a pulsed manner. The new process yields mechanically stable platinum electrodes with roughness factors of up to RF = 6500 ± 700, compared to the state-of-the-art cyclic electrodeposition method this corresponds to an improvement in RF by 111%. Furthermore the time demand for fabrication is reduced by 59%, whereas the platinum utilization is increased by 53%. The method is particularly advantageous for applications such as micro fuel cells since it enables the precise deposition of catalytically active electrodes on micro-structured conductive areas. In this context the novel platinum electrodes show higher current densities for the oxidation of formic acid and glucose than state-of-the-art electrodes. In terms of methanol oxidation their catalytic activity is comparable to commercial direct methanol fuel cell (DMFC) electrodes, fabricated from Pt-Ru nanoparticles dispersed on carbon black.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 242, 15 November 2013, Pages 255-263
Journal: Journal of Power Sources - Volume 242, 15 November 2013, Pages 255-263
نویسندگان
Christian Köhler, Arne Kloke, Anna Drzyzga, Roland Zengerle, Sven Kerzenmacher,