کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7719405 | 1497493 | 2014 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis and characterization of Cu core Pt-Ru shell nanoparticles for the electro-oxidation of alcohols
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Synthesis and characterization of Cu core Pt-Ru shell nanoparticles for the electro-oxidation of alcohols Synthesis and characterization of Cu core Pt-Ru shell nanoparticles for the electro-oxidation of alcohols](/preview/png/7719405.png)
چکیده انگلیسی
Cu@Pt-Ru core-shell supported electrocatalysts have been synthesized by a two-step process via a galvanic displacement reaction. XRD diffraction and EDX analysis, and cyclic voltammetry measurements revealed the presence of nanoparticles composed by a Cu-rich Pt-Cu core surrounded by a Pt-rich Pt-Ru shell. Cyclic voltammetry and chronoamperometric measurements showed that as-synthesized core-shell materials exhibit superior catalytic activity towards methanol and ethanol electro-oxidation compared to a commercial Pt-Ru/C catalyst with higher Pt loading. This behavior can be associated with the lattice mismatch between the Pt-rich shell and the Cu rich core, which in turn produces lattice-strain, surface ligand effects and a large amount of surface defect sites. In addition, the core-shell electrodes displayed a better catalytic activity and lower onset potentials for ethanol oxidation than for methanol oxidation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 39, Issue 16, 27 May 2014, Pages 8667-8674
Journal: International Journal of Hydrogen Energy - Volume 39, Issue 16, 27 May 2014, Pages 8667-8674
نویسندگان
Juan Manuel Sieben, Vanina Comignani, Andrea E. Alvarez, Marta M.E. Duarte,