Effect of the State of a Surface Layer on the Properties of Pd–P Catalysts in the Hydrogenation of Alkylanthraquinones

• Published in: Kinetics and catalysis Vol. 60; no. 6; pp. 808 - 817
• Main Authors: Belykh, L. B., Sterenchuk, T. P., Skripov, N. I., Akimov, V. V., Tauson, V. L., Romanchenko, A. S., Gvozdovskaya, K. L., Sanzhieva, S. B., Shmidt, F. K.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.11.2019; Springer Nature B.V
• Subjects: Amorphization; Anthraquinones; Catalysis; Catalysts; Chemistry; Chemistry and Materials Science; Esters; Hydrogen storage; Hydrogenation; Nanoparticles; Octanol; Palladium; Phosphoric acid; Photoelectrons; Physical Chemistry; Selectivity; Solid solutions; Surface layers; Toluene; X ray photoelectron spectroscopy; selectivity; palladium–phosphorus catalysts; XPS; hydrogenation; 2-ethyl-9,10-anthraquinone
• ISSN: 0023-1584; 1608-3210
• DOI: 10.1134/S0023158419060028

X-ray photoelectron spectroscopy (XPS) was used to study the state of the surface layer of a Pd–P catalyst, which exhibits high selectivity in the hydrogenation of 2-ethyl-9,10-anthraquinone. The preparation of the catalyst from Pd(acac) 2 and white phosphorus in hydrogen in a toluene–1-octanol solution led to the formation of Pd–P nanoparticles whose surface was enriched in electron-deficient palladium, apparently, as a constituent of an amorphized 2D layer based on a solid solution of Pd and P. Octyl esters of phosphoric acids, adsorbed on the surface, acted as stabilizers. A relationship between the properties of the Pd–P catalyst in the hydrogenation of 2-ethyl-9,10-anthraquinone and the state of the surface layer was considered.