Influence of Components Deposition Order on Silver Species Formation in Bimetallic Ag-Fe System Supported on Mordenite | Sciact - CRIS-system of Boreskov Institute of Catalysis

Influence of Components Deposition Order on Silver Species Formation in Bimetallic Ag-Fe System Supported on Mordenite Full article

Journal

Catalysts
ISSN: 2073-4344

Output data

Year: 2022, Volume: 12, Number: 11, Article number : 1453, Pages count : 20 DOI: 10.3390/catal12111453

Tags

mordenite; silver species; ion exchange; deposition order; iron promoter; de-NOx

Authors

Sánchez-López Perla ¹ , Kotolevich Yulia ¹ , Antúnez-García Joel ¹ , Chávez-Rivas Fernando ² , Khramov Evgeny ³ , Berlier Gloria ⁴ , Moreno-Ruiz Luis ⁵ , Zubavichus Yan ⁶ , Petranovskii Vitalii ¹ , Fuentes-Moyado Sergio ¹ , Pestryakov Alexey ⁷

Affiliations

1	Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Ensenada 22860, Mexico
2	Escuela Superior de Física y Matemáticas, Instituto Politécnico Nacional, Mexico City 07738, Mexico
3	National Research Center “Kurchatov Institute”, 123182 Moscow, Russia
4	Department of Chemistry and NIS Centre, University of Turin, Via P. Giuria 7, 10125 Turin, Italy
5	Centro de Nanociencias y Micro y Nanotecnologías, Instituto Politécnico Nacional, Mexico City 07738, Mexico
6	Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, 630090 Novosibirsk, Russia
7	Research School of Chemistry and Applied Biomedical Sciences, Tomsk Polytechnic University, 634050 Tomsk, Russia

Funding (3)

1	National Council of Science and Technology	117373
2	National Council of Science and Technology	A1-S-33492
3	Ministry of Science and Higher Education of the Russian Federation	Приоритет 2030

In the present work, various experimental and theoretical methods were combined to study in detail the modifying effect of differences in the order of deposition of components on the state of silver in bimetallic iron–silver samples based on mordenite. In each of the silver-containing samples, the formation of large (≥2 nm in diameter) varieties of silver was observed, which differed from the varieties in the other samples, and in varying degrees. The formation of large Ag NPs on the outer surface of mordenite is explained by the redox interaction of Ag+-Fe2+ and the selectivity of ion exchange. The local surrounding of Ag in the studied samples is different: for AgMOR—monatomic species dominate, FeAgMOR—silver dimers and AgFeMOR—metal particles. In all investigated samples, the partially charged intra-channel Agnδ+ clusters (~0.7 nm in size) were formed due to partial Ag+ reduction and subsequent Ag0 agglomeration into the mordenite channel. Most of the silver in the bulk of the zeolite is represented in the cationic state attached to the mordenite framework by differently coordinated electrostatic forces, which can be Ag-O, Ag-Si or Ag-Al, with variations in interatomic distances and do not depend on the order of metal deposition. In addition, the arrangement of the cations in the side pockets means that the transport channels of mordenite are free, which is favorable for the application of the materials under study in catalysis and adsorption.

Sánchez-López P. , Kotolevich Y. , Antúnez-García J. , Chávez-Rivas F. , Khramov E. , Berlier G. , Moreno-Ruiz L. , Zubavichus Y. , Petranovskii V. , Fuentes-Moyado S. , Pestryakov A.
Influence of Components Deposition Order on Silver Species Formation in Bimetallic Ag-Fe System Supported on Mordenite
Catalysts. 2022. V.12. N11. 1453 :1-20. DOI: 10.3390/catal12111453 WOS Scopus РИНЦ AN OpenAlex

Submitted:	Oct 14, 2022
Published print:	Nov 1, 2022
Accepted:	Nov 8, 2022
Published online:	Nov 17, 2022

Web of science:	WOS:000894776400001
Scopus:	2-s2.0-85149783658
Elibrary:	54731506
Chemical Abstracts:	2022:3112037
OpenAlex:	W4309284742

DB	Citing
Web of science	3
Scopus	5
OpenAlex	7
Elibrary	3