Understanding the Surface State and Proton Adsorption Phenomena on Ni-based Alloys at the Hydrogen Evolution Zone in Alkaline Medium by EIS-XPS

Understanding the Surface State and Proton Adsorption Phenomena on Ni-based Alloys at the Hydrogen Evolution Zone in Alkaline Medium by EIS-XPS

Miguel A. Oliver-Tolentino Roman Cabrera-Sierra Luis Lartundo-Rojas J. Lucero-Guerrero R. Sotelo-Boyas Arturo Manzo-Robledo*

UPIBI-IPN, Departamento de Ciencias Básicas. Av. Acueducto s/n, Barrio La Laguna, Col. Ticomán, México, D.F. 07340, Mexico

ESIQIE-IPN, Departamento de Ingeniería Química-Laboratorio de Química Analítica. Edif. Z-5 1er piso, UPALM, México D.F. 07738, Mexico

Centro de Nanociencias y Micro y Nanotecnología (CNMN). Luis Enrique Erro s/n, UPALM, Col. Zacatenco, Mexico D.F. 07738, Mexico

ESIQIE-IPN, Departamento de Ingeniería Química - Laboratorio de Electroquímica y Corrosión. Edif. Z-5 3er piso, UPALM, Mexico D.F. 07738, Mexico

Corresponding Author Email: 
1 November 2012
7 January 2013
8 July 2013
| Citation

In this work, well-defined Ni-based alloys, labeled M1 (Ni0.8CoO0.1Zn0.05MnO0.02Ti0.01Y0.01Al0.01) and M2 (NiO0.8CoO0.1Zn0.05MnO0.02Ti0.01Y0.01Al0.01), were prepared by ball-milling technique and used as electrodes for the generation of hydrogen. Electrochemical Impedance Spectroscopy (EIS) and X-ray photoelectron spectroscopy (XPS) were employed in order to understand the surface state and proton adsorption phenomena during cathodic polarization. It was found that high concentration species such as NiO and/or Ni(OH)2 induces passivation effect, suppressing the HER by increasing the electrode resistance. The charge transfer, double layer capacitance and adsorption of protons toward the electrode interface ware found to be highly controlled by the intrinsic nature of the alloy in turn.


proton adsorption, mechanical milling, electrocatalysis, passivation, metal hydrides.

1. Introduction
2. Experimental
3. Results and Discussion
4. Conclusion
5. Acknowledgements

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