Electrochemical behavior of NixW1−x materials as catalyst for hydrogen evolution reaction in alkaline media
► 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...
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Veröffentlicht in: | Journal of alloys and compounds 2012-09, Vol.536, p.S245-S249 |
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Hauptverfasser: | , , , , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | ► 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.
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. |
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ISSN: | 0925-8388 1873-4669 |
DOI: | 10.1016/j.jallcom.2011.12.086 |