کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7712375 | 1497423 | 2016 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis and characterization of Au-modified macroporous Ni electrocatalysts for alkaline water electrolysis
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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 Au-modified macroporous Ni electrocatalysts for alkaline water electrolysis Synthesis and characterization of Au-modified macroporous Ni electrocatalysts for alkaline water electrolysis](/preview/png/7712375.png)
چکیده انگلیسی
Au nanoparticles (Au-NPs) were successfully synthesized and incorporated into the surface of a macroporous Ni electrode fabricated via galvanostatic electrodeposition at high current densities in order to produce hydrogen by means of alkaline water electrolysis. The developed electrodes were morphologically characterized by means of confocal laser scanning and field emission scanning electron microscopes. The electrocatalytic behaviour towards the hydrogen evolution reaction was studied by Tafel polarization curves and electrochemical impedance spectroscopy. It was clear that enlarging the real surface area of an electrode its catalytic activity was greatly enhanced. This improvement was further increased when Au-NPs were added to the macroporous Ni surface. In this case, the improvement was not only caused by enlarging the surface area but also by an improvement in the intrinsic catalytic activity of the alloy, as it was shown by the exchange current densities values, calculated from the real surface area.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 41, Issue 2, 12 January 2016, Pages 764-772
Journal: International Journal of Hydrogen Energy - Volume 41, Issue 2, 12 January 2016, Pages 764-772
نویسندگان
Cristina González-Buch, Isaac Herraiz-Cardona, Emma M. Ortega, Sergio Mestre, ValentÃn Pérez-Herranz,