کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1615919 | 1005644 | 2012 | 5 صفحه PDF | دانلود رایگان |
In the present work, results of electrochemical evaluation, as well as morphological and structural characterization of NixW1−x materials with x = 0.77, 0.64, 0.4, 0.19 and 0.07 processed by means of high energy ball milling from high purity powders are presented. Also, the electrocatalytic performance on the hydrogen evolution reaction (HER) of the NixW1−x materials evaluated by linear polarization and cyclic voltammetry techniques in alkaline media at room temperature is discussed. The structural and morphological characterization of the as-prepared materials was carried out using X-ray diffraction (XRD) and scanning electron microscopy (SEM). Results indicated a small-particle clusters and solid solution formation. According to the kinetics parameters the best electrocatalytic activity was observed at Ni64W36.
► The electrochemical techniques used in this study elucidated the Ni–W surface state.
► The Ni–W materials were effective for the hydrogen evolution reaction.
► The prepared alloys exhibited higher catalytic activity than their precursors.
► The preparation method is relatively simple and effective procedure.
Journal: Journal of Alloys and Compounds - Volume 536, Supplement 1, 25 September 2012, Pages S245–S249