Design of amphoteric mixed oxides of zinc and Group 3 elements (Al, Ga, In): migration effects on basic features.
Identifieur interne : 000F16 ( Main/Exploration ); précédent : 000F15; suivant : 000F17Design of amphoteric mixed oxides of zinc and Group 3 elements (Al, Ga, In): migration effects on basic features.
Auteurs : RBID : pubmed:22333932English descriptors
- KwdEn :
- MESH :
- chemical , chemical synthesis : Aluminum Oxide, Zinc Oxide.
- chemical , chemistry : Aluminum Oxide, Gallium, Indium, Zinc Oxide.
- Adsorption, Catalysis, Oxidation-Reduction, Particle Size, Surface Properties.
Abstract
The design of new amphoteric catalysts is of great interest for several industrial processes, especially those covering dehydration and dehydrogenation phenomena. Adsorption microcalorimetry was used to monitor the design of mixed oxides of zinc with Group 3 elements (aluminium, gallium, indium) with amphoteric character and enhanced specific surface area. Acid-base features were found to evolve non-linearly with the relative amounts of metal, and the strengths of the created acidic or basic sites were measured by adsorption microcalorimetry. A panel of bifunctional catalysts of various acid-base (amounts, strengths) and redox character was obtained. Besides, special interest was given to In-Zn mixed oxides for their enhanced basicity: this series of catalysts displays important basic features of high strength (q(diff) (SO₂ ads.) > 200 kJ mol(SO₂)⁻¹ in substantial amounts (1 - 2 μmol m(catalyst)⁻²), whose impact on efficiency or selectivity in catalytic dehydration/dehydrogenation can be valuable.
DOI: 10.1039/c2cp23613c
PubMed: 22333932
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Adsorption microcalorimetry was used to monitor the design of mixed oxides of zinc with Group 3 elements (aluminium, gallium, indium) with amphoteric character and enhanced specific surface area. Acid-base features were found to evolve non-linearly with the relative amounts of metal, and the strengths of the created acidic or basic sites were measured by adsorption microcalorimetry. A panel of bifunctional catalysts of various acid-base (amounts, strengths) and redox character was obtained. Besides, special interest was given to In-Zn mixed oxides for their enhanced basicity: this series of catalysts displays important basic features of high strength (q(diff) (SO₂ ads.) > 200 kJ mol(SO₂)⁻¹ in substantial amounts (1 - 2 μmol m(catalyst)⁻²), whose impact on efficiency or selectivity in catalytic dehydration/dehydrogenation can be valuable.</div></front></TEI><pubmed><MedlineCitation Owner="NLM" Status="MEDLINE"><PMID Version="1">22333932</PMID><DateCreated><Year>2012</Year><Month>03</Month><Day>01</Day></DateCreated><DateCompleted><Year>2012</Year><Month>06</Month><Day>11</Day></DateCompleted><DateRevised><Year>2013</Year><Month>11</Month><Day>21</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1463-9084</ISSN><JournalIssue CitedMedium="Internet"><Volume>14</Volume><Issue>12</Issue><PubDate><Year>2012</Year><Month>Mar</Month><Day>28</Day></PubDate></JournalIssue><Title>Physical chemistry chemical physics : PCCP</Title><ISOAbbreviation>Phys Chem Chem Phys</ISOAbbreviation></Journal><ArticleTitle>Design of amphoteric mixed oxides of zinc and Group 3 elements (Al, Ga, In): migration effects on basic features.</ArticleTitle><Pagination><MedlinePgn>4155-61</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1039/c2cp23613c</ELocationID><Abstract><AbstractText>The design of new amphoteric catalysts is of great interest for several industrial processes, especially those covering dehydration and dehydrogenation phenomena. Adsorption microcalorimetry was used to monitor the design of mixed oxides of zinc with Group 3 elements (aluminium, gallium, indium) with amphoteric character and enhanced specific surface area. Acid-base features were found to evolve non-linearly with the relative amounts of metal, and the strengths of the created acidic or basic sites were measured by adsorption microcalorimetry. A panel of bifunctional catalysts of various acid-base (amounts, strengths) and redox character was obtained. Besides, special interest was given to In-Zn mixed oxides for their enhanced basicity: this series of catalysts displays important basic features of high strength (q(diff) (SO₂ ads.) > 200 kJ mol(SO₂)⁻¹ in substantial amounts (1 - 2 μmol m(catalyst)⁻²), whose impact on efficiency or selectivity in catalytic dehydration/dehydrogenation can be valuable.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Mekki-Berrada</LastName><ForeName>Adrien</ForeName><Initials>A</Initials><Affiliation>IRCELYON, CNRS UMR5256, Université Lyon1, 2 avenue Albert Einstein, Villeurbanne, France.</Affiliation></Author><Author ValidYN="Y"><LastName>Grondin</LastName><ForeName>Didier</ForeName><Initials>D</Initials></Author><Author ValidYN="Y"><LastName>Bennici</LastName><ForeName>Simona</ForeName><Initials>S</Initials></Author><Author ValidYN="Y"><LastName>Auroux</LastName><ForeName>Aline</ForeName><Initials>A</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType>Journal Article</PublicationType><PublicationType>Research Support, Non-U.S. Gov't</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2012</Year><Month>02</Month><Day>15</Day></ArticleDate></Article><MedlineJournalInfo><Country>England</Country><MedlineTA>Phys Chem Chem Phys</MedlineTA><NlmUniqueID>100888160</NlmUniqueID><ISSNLinking>1463-9076</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>045A6V3VFX</RegistryNumber><NameOfSubstance>Indium</NameOfSubstance></Chemical><Chemical><RegistryNumber>12024-21-4</RegistryNumber><NameOfSubstance>gallium oxide</NameOfSubstance></Chemical><Chemical><RegistryNumber>4OO9KME22D</RegistryNumber><NameOfSubstance>indium oxide</NameOfSubstance></Chemical><Chemical><RegistryNumber>CH46OC8YV4</RegistryNumber><NameOfSubstance>Gallium</NameOfSubstance></Chemical><Chemical><RegistryNumber>LMI26O6933</RegistryNumber><NameOfSubstance>Aluminum Oxide</NameOfSubstance></Chemical><Chemical><RegistryNumber>SOI2LOH54Z</RegistryNumber><NameOfSubstance>Zinc Oxide</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName MajorTopicYN="N">Adsorption</DescriptorName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N">Aluminum Oxide</DescriptorName><QualifierName MajorTopicYN="Y">chemical synthesis</QualifierName><QualifierName MajorTopicYN="N">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N">Catalysis</DescriptorName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N">Gallium</DescriptorName><QualifierName MajorTopicYN="Y">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N">Indium</DescriptorName><QualifierName MajorTopicYN="Y">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N">Oxidation-Reduction</DescriptorName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N">Particle Size</DescriptorName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N">Surface Properties</DescriptorName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N">Zinc Oxide</DescriptorName><QualifierName MajorTopicYN="Y">chemical synthesis</QualifierName><QualifierName MajorTopicYN="N">chemistry</QualifierName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="aheadofprint"><Year>2012</Year><Month>2</Month><Day>15</Day></PubMedPubDate><PubMedPubDate PubStatus="epublish"><Year>2012</Year><Month>2</Month><Day>29</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2012</Year><Month>2</Month><Day>16</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2012</Year><Month>2</Month><Day>16</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2012</Year><Month>6</Month><Day>12</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="doi">10.1039/c2cp23613c</ArticleId><ArticleId IdType="pubmed">22333932</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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