Formation of the surface of Pt-Ni-Cr/C catalysts under reducing conditions

Formation of the surface of Pt-Ni-Cr/C catalysts under reducing conditions Full article

Journal

Russian Chemical Bulletin
ISSN: 1573-9171 , E-ISSN: 1066-5285

Output data

Year: 2021, Volume: 70, Number: 2, Pages: 323-329 Pages count : 7 DOI: 10.1007/s11172-021-3088-4

Authors

Kalenchuk A.N. ^1,2 , Maslakov K.I. ¹ , Bogdan T.V. ^1,2 , Chernavskiy P.A. ^1,2 , Bogdan V.I. ^1,2

Affiliations

1	Department of Chemistry, Lomonosov Moscow State University, Moscow, Russian Federation
2	N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow, Russian Federation

The mutual influence of metals in processes of reduction of mono-, bi-, and trimetallic Pt-Ni-Cr catalysts on the Sibunite (C) carbon support during the hydrogenation—dehydrogenation reactions was studied using XPS, TEM, and temperature-programmed reduction (TPR). The TEM data on the phase composition of the catalysts are consistent with the established valence states of metals and their behavior during the TPR process. It is found that in calcined Pt/C samples, the main fraction of platinum exists in the form of electron-deficient Ptδ+ particles, and their treatment with hydrogen does not lead to a significant reduction of platinum to the metallic state Pt0. The introduction of nickel into the catalyst reduces the concentration of electron-deficient platinum Ptδ+ particles, whereas the addition of chromium results in an increase in the concentration of these particles even in the samples subjected to the reduction treatment.

Kalenchuk A.N. , Maslakov K.I. , Bogdan T.V. , Chernavskiy P.A. , Bogdan V.I.
Formation of the surface of Pt-Ni-Cr/C catalysts under reducing conditions
Russian Chemical Bulletin. 2021. V.70. N2. P.323-329. DOI: 10.1007/s11172-021-3088-4 Scopus OpenAlex

≡ Scopus:	2-s2.0-85101158115
≡ OpenAlex:	W3134515680