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Role of Mordenite Acid Properties in Silver Cluster Stabilization Full article

Общее Language: Английский, Genre: Full article,
Status: Published, Source type: Original
Journal Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing
ISSN: 0921-5093
Output data Year: 2000, Volume: A276, Number: 102, Pages: 236-242 Pages count : 7 DOI: 10.1016/S0921-5093(99)00133-1
Tags Acid properties; Mordenite; Silver clusters
Authors Bogdanchikova N.E. 1 , Petranovskii V. 1,2 , Fuentes S. 1 , Paukshtis E.A. 3 , Sugi Y. 4 , Licea-Claverie A. 5
Affiliations
1 National Autonomous University of Mexico
2 Ensenada Center for Scientific Research and Higher Education
3 Boreskov Institute of Catalysis SB RAS
4 Gifu University
5 Tijuana Institute of Technology

Funding (3)

1 National Autonomous University of Mexico 930286
2 National Council of Science and Technology 2558-5-3895P-E
3 National Council of Science and Technology 960021

Abstract: In the present work, the role of SiO2/Al2O3 molar ratio in silver cluster stabilization inside mordenite pores was studied. It was found that SiO2/Al2O3 molar ratio regulates silver cluster stabilization by means of change of mordenite acid properties. The high concentration and high strength of Bro¨nsted acid sites favor the stabilization of silver in the form of clusters inside the pores. In contrast, low concentration and low strength of Bro¨nsted acid sites and high concentration of Lewis sites inside the channels can hinder stabilization of silver clusters. In this case, large particles on the external surface of zeolite are preferably formed. It was revealed that silver cluster introduction in its turn influences acid properties of mordenites, changing the concentration and structure of acid sites. As a result of silver incorporation, four types of Lewis acid sites presented in H-mordenites disappear and a new type of Lewis acid site appears. For the majority of samples, it is accompanied by enhancement of concentration of Lewis sites so that all Al becomes ‘IR visible’
Cite: Bogdanchikova N.E. , Petranovskii V. , Fuentes S. , Paukshtis E.A. , Sugi Y. , Licea-Claverie A.
Role of Mordenite Acid Properties in Silver Cluster Stabilization
Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing. 2000. V.A276. N102. P.236-242. DOI: 10.1016/S0921-5093(99)00133-1 publication_identifier_short.wos_identifier_type publication_identifier_short.scopus_identifier_type publication_identifier_short.rinz_identifier_type
Dates:
Submitted: Dec 10, 1998
Published online: Dec 17, 1999
Published print: Jan 15, 2000
Identifiers:
publication_identifier.wos_identifier_type WOS:000084583200029
publication_identifier.scopus_identifier_type 2-s2.0-0000253725
publication_identifier.rinz_identifier_type 13355720
publication_identifier.accession_number_identifier_type 1999:793344
publication_identifier.chemical_accession_number_identifier_type 132:69837
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