کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4908035 | 1426586 | 2017 | 18 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Incorporation of cobalt into Pd2Sn intermetallic nanoparticles as durable oxygen reduction electrocatalyst
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
Intermetallic compounds (IMCs) can enhance the electrocatalytic performance of the oxygen reduction reaction (ORR) because of their definite composition and structure and strong electron interaction. Here, we present a one-pot synthesis of structurally ordered Pd2Sn and Pd6Sn3Co nanoparticles supported on carbon material at low temperature without utilizing surfactant. Both XRD and high-resolution TEM results confirm the formation of IMC phase. The incorporation of Co atoms into Pd2Sn leads to a lattice contraction. EDX line scan analysis and ICP-AES demonstrate that the Pd:Sn:Co atomic ratio of ordered Pd6Sn3Co IMC is close to its nominal composition. The X-ray photoelectron spectroscopy indicates that the binding energies of Pd 3d3/2 and Pd 3d5/2 within the Pd6Sn3Co IMC are upshifted as compared with the Pd2Sn IMC, suggesting that a down-shift of d-band center relative to the Fermi level. This shift could explain that the Pd6Sn3Co IMC catalyst exhibits a higher activity and much better durability for the ORR in alkaline medium than the commercial Pt/C and Pd2Sn IMC catalysts.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electroanalytical Chemistry - Volume 789, 15 March 2017, Pages 167-173
Journal: Journal of Electroanalytical Chemistry - Volume 789, 15 March 2017, Pages 167-173
نویسندگان
Yurong Wu, Congming Wang, Liangliang Zou, Qinghong Huang, Hui Yang,