The Investigations of Surface Treatment Methods and Characterization of Oxide Films on AB_5based Metal Hydride Electrodes Ⅰ. New Nirich treatment methods and photoelectrochemical characterization of oxide films

Authors

Junmin Nan
Yong Yang
Jun Li
Zugeng Lin

Corresponding Author

Yong Yang(yyang@xmu.edu.cn)

Abstract

Two simple and efficient surface treatment methods for AB_5type hydrogen storage alloys were developed. The results of X-ray photoelectron spectroscopy (XPS) and cyclic voltammetric (CV) experiments showed that the hydrogen storage alloys treated by two different methods had Nirich surface layer so that the performances of the electrodes were improved after treatment. The characterization of the oxide films which formed on the surface of electrodes through potentiodynamic oxidation with the help of photoelectrochemical microscopy (PEM) were done. The anodic photocurrent and the cathodic photocurrent related to the oxidation of hydrogen and the reduction of oxygen on the surface layer were observed in different potential regions respectively. Furthermore, it was found that the capability of oxidationresist of alloy depends on the surface treatment procedure, and it was shown that the capability of oxidationresist of alloy treated by the 1st method was better than the second. Finally, it was demonstrated that the discharge performance of the electrode treated by the 1st method was greatly improved.

DOI Link

https://doi.org/10.61558/2993-074X.2679

Publication Date

1998-02-28

Online Available Date

1998-02-28

Revised Date

1998-02-28

Received Date

1998-02-28

Recommended Citation

Junmin Nan, Yong Yang, Jun Li, Zugeng Lin. The Investigations of Surface Treatment Methods and Characterization of Oxide Films on AB_5based Metal Hydride Electrodes Ⅰ. New Nirich treatment methods and photoelectrochemical characterization of oxide films[J]. Journal of Electrochemistry, 1998 , 4(1): Article 14.
DOI: 10.61558/2993-074X.2679
Available at: https://jelectrochem.xmu.edu.cn/journal/vol4/iss1/14

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