کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9803467 | 1516467 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Study of amorphous Ni-S(La) alloy used as HER cathode in alkaline medium
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
Using an orthogonal design, i.e. the LaCl3 concentration, the current density and the pH value as the factors, Ni-S(La) alloy was obtained through electrodeposition in a modified Watts bath by adding thiourea (TU) and LaCl3 into the bath. The structure and morphology were determined by XRD and SEM. The electrochemical properties, including the hydrogen evolution overvoltages η (h.o.v.), the Tafel slope b, the exchange current density i0 and the activation energy ÎH* of an amorphous Ni-S(La) cathode were measured. The effect of heat treatment under various temperatures on its structure and electrochemical properties were determined. The results indicate that the structure of Ni-S(La) alloy obtained under the optimum conditions is amorphous and it shows much higher electrochemical activity than other electrodes including the amorphous Ni-S electrode due to the higher sulfur content in such an electrode. Heat treatment is harmful to its electrochemical activity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 400, Issues 1â2, 1 September 2005, Pages 265-269
Journal: Journal of Alloys and Compounds - Volume 400, Issues 1â2, 1 September 2005, Pages 265-269
نویسندگان
Qing Han, Xin Li, Jianshe Chen, Kuiren Liu, Xiaohui Dong, Xujun Wei,