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Article

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

by
Perla Sánchez-López
1,
Yulia Kotolevich
1,*,
Joel Antúnez-García
1,*,
Fernando Chávez-Rivas
2,
Evgeny Khramov
3,
Gloria Berlier
4,
Luis Moreno-Ruiz
5,
Yan Zubavichus
6,
Vitalii Petranovskii
1,
Sergio Fuentes-Moyado
1 and
Alexey Pestryakov
7,*
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
*
Authors to whom correspondence should be addressed.
Catalysts 2022, 12(11), 1453; https://doi.org/10.3390/catal12111453
Submission received: 14 October 2022 / Revised: 7 November 2022 / Accepted: 8 November 2022 / Published: 17 November 2022
(This article belongs to the Special Issue Advances in Transition Metal Catalysis)
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Abstract

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

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MDPI and ACS Style

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.; et al. Influence of Components Deposition Order on Silver Species Formation in Bimetallic Ag-Fe System Supported on Mordenite. Catalysts 2022, 12, 1453. https://doi.org/10.3390/catal12111453

AMA Style

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, et al. Influence of Components Deposition Order on Silver Species Formation in Bimetallic Ag-Fe System Supported on Mordenite. Catalysts. 2022; 12(11):1453. https://doi.org/10.3390/catal12111453

Chicago/Turabian Style

Sánchez-López, Perla, Yulia Kotolevich, Joel Antúnez-García, Fernando Chávez-Rivas, Evgeny Khramov, Gloria Berlier, Luis Moreno-Ruiz, Yan Zubavichus, Vitalii Petranovskii, Sergio Fuentes-Moyado, and et al. 2022. "Influence of Components Deposition Order on Silver Species Formation in Bimetallic Ag-Fe System Supported on Mordenite" Catalysts 12, no. 11: 1453. https://doi.org/10.3390/catal12111453

APA Style

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. (2022). Influence of Components Deposition Order on Silver Species Formation in Bimetallic Ag-Fe System Supported on Mordenite. Catalysts, 12(11), 1453. https://doi.org/10.3390/catal12111453

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