Conclusions
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1.
XPS methods have been used to demonstrate cobalt enrichment of the Co-Ni alloy surface. The degree of enrichment can be significantly increased by oxidative treatment of the alloy.
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2.
A considerable proportion of the CO adsorbed by the alloy at 250–400°C is taken up in dissociated form, while dissociation of the adsorbed NO is appreciable even at room temperature. Adsorption of CO and NO, and CO + NO mixtures, increases the surface concentration of Co, leading to the formation of surface compounds of Co and Ni of the oxide, nitride, and (possibly), carbide types.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 11, pp. 2466–2472, November, 1981.
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Shpiro, E.S., Rudnyi, Y., Tkachenko, O.P. et al. Surface compositions of Co-Ni alloys and the action of these alloys as sorbents for nitrogen and carbon monoxide. Russ Chem Bull 30, 2036–2040 (1981). https://doi.org/10.1007/BF01094623
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DOI: https://doi.org/10.1007/BF01094623