Studies on High-Temperature Evolution of Low-Loaded Pd Three-Way Catalysts Prepared by Laser Electrodispersion | Sciact - CRIS-system of Boreskov Institute of Catalysis

Studies on High-Temperature Evolution of Low-Loaded Pd Three-Way Catalysts Prepared by Laser Electrodispersion Full article

Journal

Materials
ISSN: 1996-1944

Output data

Year: 2023, Volume: 16, Number: 9, Article number : 3501, Pages count : 19 DOI: 10.3390/ma16093501

Tags

laser electrodispersion; palladium nanoparticles; alumina support; three-way catalysts; thermal stability; characterization

Authors

Rostovshchikova Tatiana N. ¹ , Shilina Marina I. ¹ , Gurevich Sergey A. ² , Yavsin Denis A. ² , Veselov Grigory B. ³ , Stoyanovskii Vladimir O. ³ , Vedyagin Aleksey A. ³

Affiliations

1	Department of Chemistry, Lomonosov Moscow State University, 1/3 Leninskie Gory, 119991 Moscow, Russia
2	Ioffe Physico-Technical Institute, Russian Academy of Sciences, 26 Politechnicheskaya Str., 194021 Saint Petersburg, Russia
3	Boreskov Institute of Catalysis, 5 Lavrentyev Avenue, 630090 Novosibirsk, Russia

Funding (3)

1	Ministry of Science and Higher Education of the Russian Federation	0239-2021-0010
2	Ministry of Science and Higher Education of the Russian Federation	АААА-А21-121011590090-7
3	Ministry of Science and Higher Education of the Russian Federation	0040-2019-0010

Pd/Al2O3 catalyst of the “crust” type with Pd loading of 0.03 wt.% was prepared by the deposition of 2 nm Pd particles on the outer surface of the alumina support using laser electrodispersion (LED). This technique differs from a standard laser ablation into a liquid in that the formation of monodisperse nanoparticles occurs in the laser torch plasma in a vacuum. As is found, the LED-prepared catalyst surpasses Pd-containing three-way catalysts, obtained by conventional chemical synthesis, in activity and stability in CO oxidation under prompt thermal aging conditions. Thus, the LED-prepared Pd/Al2O3 catalyst showed the best thermal stability up to 1000 °C. The present research is focused on the study of the high-temperature evolution of the Pd/Al2O3 catalyst in two reaction mixtures by a set of physicochemical methods (transmission electron microscopy, X-ray photoelectron spectroscopy, and diffuse reflectance UV-vis spectroscopy). In order to follow the dispersion of the Pd nanoparticles during the thermal aging procedure, the testing reaction of ethane hydrogenolysis was also applied. The possible reasons for the high stability of LED-prepared catalysts are suggested.

Rostovshchikova T.N. , Shilina M.I. , Gurevich S.A. , Yavsin D.A. , Veselov G.B. , Stoyanovskii V.O. , Vedyagin A.A.
Studies on High-Temperature Evolution of Low-Loaded Pd Three-Way Catalysts Prepared by Laser Electrodispersion
Materials. 2023. V.16. N9. 3501 :1-19. DOI: 10.3390/ma16093501 WOS Scopus РИНЦ AN PMID OpenAlex

Submitted:	Mar 28, 2023
Accepted:	Apr 28, 2023
Published print:	May 1, 2023
Published online:	May 1, 2023

Web of science:	WOS:000987290200001
Scopus:	2-s2.0-85159264804
Elibrary:	54041606
Chemical Abstracts:	2023:1080505
PMID:	37176383
OpenAlex:	W4367624971

DB	Citing
Scopus	2
Web of science	2
Elibrary	2
OpenAlex	2