Surface oxidation of NiCo alloy: A comparative X-ray photoelectron spectroscopy study in a wide pressure range

[Display omitted] ► NiCo alloy surface oxidation is studied in two pressure regimes (5×10−7mbar and 0.5bar). ► Segregation and preferential oxidation of cobalt onto NiCo alloy surface. ► Cobalt segregation reaches a maximum in 0.5bar O2 upon complete oxidation of Co0 to Co2+. ► Formation of CoxNi1−x...

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Veröffentlicht in:	Applied surface science 2011-12, Vol.258 (4), p.1480-1487
Hauptverfasser:	Law, Y.T., Dintzer, T., Zafeiratos, S.
Format:	Artikel
Sprache:	eng
Schlagworte:	Bimetallic catalysts Cobalt Condensed matter: electronic structure, electrical, magnetic, and optical properties Condensed matter: structure, mechanical and thermal properties Cross-disciplinary physics: materials science rheology Ethanol reforming Exact sciences and technology Low pressure Nickel NiCo alloy Oxidation Oxides Photoelectron spectroscopy Physics Pressure gap X-ray photoelectron spectroscopy X-rays
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