کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9809632 | 1517713 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Studies on the influence of palladium coatings on the electrochemical and structural properties of a metal hydride alloy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
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چکیده انگلیسی
Electroless palladium deposition was made on the surface of LaNi4.7Sn0.3 metal hydride particles with the aim of studying the influence on the charge/discharge performance of this alloy. The palladium layer was produced by chemical replacement of a copper film deposited on the alloy and its structure was studied by X-ray absorption spectroscopy. The residual copper layer remaining on the alloy surface after palladium deposition was mainly composed of metallic nanometric particles. Ex situ X-ray absorption near-edge structure (XANES) at the Ni K edge indicated that the Pd/Cu layer may protect the Ni atoms against corrosion during the charge/discharge cycles. XANES also indicates that the palladium layer presents the same unit cell characteristics of the bulk Pd in a foil. The electrode prepared with the coated alloy presented lower charge/discharge overpotentials as well as lower charge transfer resistance as verified by electrochemical impedance spectroscopy.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface and Coatings Technology - Volume 197, Issues 2â3, 22 July 2005, Pages 215-222
Journal: Surface and Coatings Technology - Volume 197, Issues 2â3, 22 July 2005, Pages 215-222
نویسندگان
Renato Canha Ambrosio, Edson A. Ticianelli,