{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1361981469354560896.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1021/jp054442e"}},{"identifier":{"@type":"URI","@value":"https://pubs.acs.org/doi/pdf/10.1021/jp054442e"}},{"identifier":{"@type":"PMID","@value":"16471531"}}],"dc:title":[{"@value":"Identification and Measurements of Strong Brønsted Acid Site in Ultrastable Y (USY) Zeolite"}],"description":[{"notation":[{"@value":"By using the IRMS-TPD method in which IR (infrared) and MS (mass spectroscopy) worked together, acid sites of USY (ultrastable Y) zeolite were studied. A new band of OH playing a role of Brønsted acid was clearly detected on Na2H2-ethylenediaminetetraacetic acid (EDTA)-treated USY at 3595 cm(-1) during an elevation in temperature after the adsorption of ammonia. MS-measured TPD (temperature-programmed desorption) of NH3 and IR-measured TPD of the NH4+ cation coincided well to show that this zeolite consisted of the Brønsted acid sites. The MS-TPD profile at higher temperatures corresponded to the IR-TPD of the 3595-cm(-1) band, and therefore, this OH was identified as a strong acid site. From comparison between IR-TPD of OH and MS-TPD, numbers of three kinds of Brønsted OH (i.e., those in super and sodalite cages of a Y zeolite structure) and created strong Brønsted acid site were quantified. On the other hand, strength of the Brønsted acid site DeltaH was determined individually by a simulation method, where the corrected IR-TPD of OH was simulated based on the proposed equation. Thus, a new strong Brønsted acid site was identified in the EDTA-treated USY, and the amount and strength was measured quantitatively."}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1381981469354560899","@type":"Researcher","foaf:name":[{"@value":"Miki Niwa"}],"jpcoar:affiliationName":[{"@value":"Department of Materials Science, Faculty of Engineering, Tottori University, 4-101, Koyama-minami, Tottori 680-8552, Japan, and PRESTO, Japan Science and Technology, Kawaguchi 332-00012, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1381981469354560896","@type":"Researcher","foaf:name":[{"@value":"Katsuki Suzuki"}],"jpcoar:affiliationName":[{"@value":"Department of Materials Science, Faculty of Engineering, Tottori University, 4-101, Koyama-minami, Tottori 680-8552, Japan, and PRESTO, Japan Science and Technology, Kawaguchi 332-00012, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1381981469354560897","@type":"Researcher","foaf:name":[{"@value":"Kazuyo Isamoto"}],"jpcoar:affiliationName":[{"@value":"Department of Materials Science, Faculty of Engineering, Tottori University, 4-101, Koyama-minami, Tottori 680-8552, Japan, and PRESTO, Japan Science and Technology, Kawaguchi 332-00012, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1381981469354560898","@type":"Researcher","foaf:name":[{"@value":"Naonobu Katada"}],"jpcoar:affiliationName":[{"@value":"Department of Materials Science, Faculty of Engineering, Tottori University, 4-101, Koyama-minami, Tottori 680-8552, Japan, and PRESTO, Japan Science and Technology, Kawaguchi 332-00012, Japan"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"15206106"},{"@type":"EISSN","@value":"15205207"}],"prism:publicationName":[{"@value":"The Journal of Physical Chemistry B"}],"dc:publisher":[{"@value":"American Chemical Society (ACS)"}],"prism:publicationDate":"2005-12-13","prism:volume":"110","prism:number":"1","prism:startingPage":"264","prism:endingPage":"269"},"reviewed":"false","url":[{"@id":"https://pubs.acs.org/doi/pdf/10.1021/jp054442e"}],"createdAt":"2006-01-05","modifiedAt":"2021-10-17","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360004232362083200","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Analysis and interpretation of acidic nature of aluminosilicates"}]},{"@id":"https://cir.nii.ac.jp/crid/1360283694088260352","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Enhancement in Cracking Activity of USY Zeolites Treated with Ammonium Nitrate Solution"}]},{"@id":"https://cir.nii.ac.jp/crid/1360285707013219712","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Strong Brønsted acid site in HZSM-5 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