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Exploring the incorporation of nitrogen in titanium and its influence on the electrochemical corrosion resistance in acidic media

MPS-Authors

Velasco Velez,  Juan
Max Planck Institute for Chemical Energy Conversion, Max Planck Society;

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Davaasuren,  Bambar
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Scherzer,  Michael
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Cap,  Sébastien
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

Willinger,  Marc Georg
Max Planck Institute for Chemical Energy Conversion, Max Planck Society;

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Schlögl,  Robert
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;
Max Planck Institute for Chemical Energy Conversion, Max Planck Society;

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Knop-Gericke,  Axel
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Surf. Sci.pdf
(Any fulltext), 159KB

Supplementary Material (public)

Surf. Sci_fig.pdf
(Supplementary material), 751KB

Citation

Velasco Velez, J., Davaasuren, B., Scherzer, M., Cap, S., Willinger, M. G., Guo, J.-H., et al. (2016). Exploring the incorporation of nitrogen in titanium and its influence on the electrochemical corrosion resistance in acidic media. Surface Science, 650, 272-278. doi:10.1016/j.susc.2016.01.007.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0029-7F37-F
Abstract
The role of the nitrogen incorporation into titanium, its chemical nature, the location in the titanium lattice and its electrochemical performance were investigated by a combination of several spectroscopy and microscopy techniques using samples prepared by CVD of NH3 at different temperatures and successive electrochemically tested in 1 M of HClO4. We found that nitrogen is incorporated in either the interstitial or substitutional site of the lattice depending on the preparation temperature modifying strongly its corrosion resistance which was ascribed to the N 2p hybridization with the Ti 3d orbitals. It was found that at low temperature the N 2p orbitals were more likely to hybridize with Ti3d-t2g orbitals while higher temperature favors the hybridization with the Ti3d-eg orbitals. This is responsible for the corrosion resistance shown by the samples prepared at higher temperature.