The activity of yttrium-modified Mg,Al hydrotalcites in the epoxidation of styrene with hydrogen peroxide
[Display omitted] ► The introduction of yttrium in Mg,Al hydrotalcite occurs without its insertion in the Mg or Al octahedral positions. ► The lower electronegativity of yttrium led to an increase of the basicity. ► The memory effect plays an important role in the reconstruction of the LDH structure...
Gespeichert in:
| Veröffentlicht in: | Applied catalysis. A, General General, 2011-08, Vol.403 (1), p.83-90 |
|---|---|
| Hauptverfasser: | , , , |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | 90 |
|---|---|
| container_issue | 1 |
| container_start_page | 83 |
| container_title | Applied catalysis. A, General |
| container_volume | 403 |
| creator | Pavel, O.D. Cojocaru, B. Angelescu, E. Pârvulescu, V.I. |
| description | [Display omitted]
► The introduction of yttrium in Mg,Al hydrotalcite occurs without its insertion in the Mg or Al octahedral positions. ► The lower electronegativity of yttrium led to an increase of the basicity. ► The memory effect plays an important role in the reconstruction of the LDH structure from the beginning of the reaction. ► Hydration of mixed oxides generates a worm texture and contributes to the decrease of the surface area. ► During reconstruction of the LDH under inert atmosphere part of carbonic anions are replaced by hydroxyl groups.
Modification of Mg,Al hydrotalcite with Y
3+ prepared following co-precipitation at low suprasaturation led to an improvement of the activity and selectivity for styrene epoxidation with hydrogen peroxide in acetonitrile. The materials were characterized using several techniques such as XRD, DRIFT, TEM, CO
2-TPD and adsorption–desorption isotherms of nitrogen at −196
°C. It was thus demonstrated that the memory effect of hydrotalcite acts very quickly even in an unfriendly environment like that generated by hydrogen peroxide. A direct correlation between the memory effect and the catalytic behavior in the epoxidation of the styrene has been demonstrated. MgO and Al
2O
3 were also prepared using the precipitation method. The investigation of MgO, Al
2O
3 and of a mechanic mixture of them showed that the activity of the catalysts in this reaction correlates very well with their basicity. |
| doi_str_mv | 10.1016/j.apcata.2011.06.017 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_1671420603</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><els_id>S0926860X11003644</els_id><sourcerecordid>1671420603</sourcerecordid><originalsourceid>FETCH-LOGICAL-c406t-4f7f7a4cdfae500401cf92f397b616a3bc8977b51eed86c81fd59caf77b70dad3</originalsourceid><addsrcrecordid>eNp9kE2LFDEQhoMoOK7-Aw-5CB7sttKdTrovwrL4BSteVvAWMkllp4aeTptkVvvf20MvHj0VFM9TL_Uy9lpALUCo98fazs4WWzcgRA2qBqGfsJ3odVu1ve6esh0Mjap6BT-fsxc5HwGgkUO3Y3R3QG5doQcqC4-BL6UkOp-qU_QUCD3_dv_ueuSHxadY7OioYOY08bJ6OMc_5G2hOF3UXJaEE_LfVA6bcI8TnzFdKHzJngU7Znz1OK_Yj08f726-VLffP3-9ub6tnARVKhl00FY6Hyx2ABKEC0MT2kHvlVC23bt-0HrfCUTfK9eL4LvB2bDuNHjr2yv2drs7p_jrjLmYE2WH42gnjOdshNJCNqCgXVG5oS7FnBMGMyc62bQYAebSrDmarVlzadaAMmuzq_bmMcFmZ8eQ7OQo_3MbKeUAol-5DxuH67sPhMlkRzg59JTQFeMj_T_oL4jikxc</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>1671420603</pqid></control><display><type>article</type><title>The activity of yttrium-modified Mg,Al hydrotalcites in the epoxidation of styrene with hydrogen peroxide</title><source>Access via ScienceDirect (Elsevier)</source><creator>Pavel, O.D. ; Cojocaru, B. ; Angelescu, E. ; Pârvulescu, V.I.</creator><creatorcontrib>Pavel, O.D. ; Cojocaru, B. ; Angelescu, E. ; Pârvulescu, V.I.</creatorcontrib><description>[Display omitted]
► The introduction of yttrium in Mg,Al hydrotalcite occurs without its insertion in the Mg or Al octahedral positions. ► The lower electronegativity of yttrium led to an increase of the basicity. ► The memory effect plays an important role in the reconstruction of the LDH structure from the beginning of the reaction. ► Hydration of mixed oxides generates a worm texture and contributes to the decrease of the surface area. ► During reconstruction of the LDH under inert atmosphere part of carbonic anions are replaced by hydroxyl groups.
Modification of Mg,Al hydrotalcite with Y
3+ prepared following co-precipitation at low suprasaturation led to an improvement of the activity and selectivity for styrene epoxidation with hydrogen peroxide in acetonitrile. The materials were characterized using several techniques such as XRD, DRIFT, TEM, CO
2-TPD and adsorption–desorption isotherms of nitrogen at −196
°C. It was thus demonstrated that the memory effect of hydrotalcite acts very quickly even in an unfriendly environment like that generated by hydrogen peroxide. A direct correlation between the memory effect and the catalytic behavior in the epoxidation of the styrene has been demonstrated. MgO and Al
2O
3 were also prepared using the precipitation method. The investigation of MgO, Al
2O
3 and of a mechanic mixture of them showed that the activity of the catalysts in this reaction correlates very well with their basicity.</description><identifier>ISSN: 0926-860X</identifier><identifier>EISSN: 1873-3875</identifier><identifier>DOI: 10.1016/j.apcata.2011.06.017</identifier><language>eng</language><publisher>Kidlington: Elsevier B.V</publisher><subject>Aluminum oxide ; Catalysis ; Catalysts ; Chemistry ; Correlation ; Epoxidation ; Exact sciences and technology ; General and physical chemistry ; Hydrogen peroxide ; Hydrotalcite-like materials ; Magnesium oxide ; Memory effect ; Styrene epoxidation ; Styrenes ; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry</subject><ispartof>Applied catalysis. A, General, 2011-08, Vol.403 (1), p.83-90</ispartof><rights>2011 Elsevier B.V.</rights><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c406t-4f7f7a4cdfae500401cf92f397b616a3bc8977b51eed86c81fd59caf77b70dad3</citedby><cites>FETCH-LOGICAL-c406t-4f7f7a4cdfae500401cf92f397b616a3bc8977b51eed86c81fd59caf77b70dad3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.apcata.2011.06.017$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=24449018$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Pavel, O.D.</creatorcontrib><creatorcontrib>Cojocaru, B.</creatorcontrib><creatorcontrib>Angelescu, E.</creatorcontrib><creatorcontrib>Pârvulescu, V.I.</creatorcontrib><title>The activity of yttrium-modified Mg,Al hydrotalcites in the epoxidation of styrene with hydrogen peroxide</title><title>Applied catalysis. A, General</title><description>[Display omitted]
► The introduction of yttrium in Mg,Al hydrotalcite occurs without its insertion in the Mg or Al octahedral positions. ► The lower electronegativity of yttrium led to an increase of the basicity. ► The memory effect plays an important role in the reconstruction of the LDH structure from the beginning of the reaction. ► Hydration of mixed oxides generates a worm texture and contributes to the decrease of the surface area. ► During reconstruction of the LDH under inert atmosphere part of carbonic anions are replaced by hydroxyl groups.
Modification of Mg,Al hydrotalcite with Y
3+ prepared following co-precipitation at low suprasaturation led to an improvement of the activity and selectivity for styrene epoxidation with hydrogen peroxide in acetonitrile. The materials were characterized using several techniques such as XRD, DRIFT, TEM, CO
2-TPD and adsorption–desorption isotherms of nitrogen at −196
°C. It was thus demonstrated that the memory effect of hydrotalcite acts very quickly even in an unfriendly environment like that generated by hydrogen peroxide. A direct correlation between the memory effect and the catalytic behavior in the epoxidation of the styrene has been demonstrated. MgO and Al
2O
3 were also prepared using the precipitation method. The investigation of MgO, Al
2O
3 and of a mechanic mixture of them showed that the activity of the catalysts in this reaction correlates very well with their basicity.</description><subject>Aluminum oxide</subject><subject>Catalysis</subject><subject>Catalysts</subject><subject>Chemistry</subject><subject>Correlation</subject><subject>Epoxidation</subject><subject>Exact sciences and technology</subject><subject>General and physical chemistry</subject><subject>Hydrogen peroxide</subject><subject>Hydrotalcite-like materials</subject><subject>Magnesium oxide</subject><subject>Memory effect</subject><subject>Styrene epoxidation</subject><subject>Styrenes</subject><subject>Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry</subject><issn>0926-860X</issn><issn>1873-3875</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><recordid>eNp9kE2LFDEQhoMoOK7-Aw-5CB7sttKdTrovwrL4BSteVvAWMkllp4aeTptkVvvf20MvHj0VFM9TL_Uy9lpALUCo98fazs4WWzcgRA2qBqGfsJ3odVu1ve6esh0Mjap6BT-fsxc5HwGgkUO3Y3R3QG5doQcqC4-BL6UkOp-qU_QUCD3_dv_ueuSHxadY7OioYOY08bJ6OMc_5G2hOF3UXJaEE_LfVA6bcI8TnzFdKHzJngU7Znz1OK_Yj08f726-VLffP3-9ub6tnARVKhl00FY6Hyx2ABKEC0MT2kHvlVC23bt-0HrfCUTfK9eL4LvB2bDuNHjr2yv2drs7p_jrjLmYE2WH42gnjOdshNJCNqCgXVG5oS7FnBMGMyc62bQYAebSrDmarVlzadaAMmuzq_bmMcFmZ8eQ7OQo_3MbKeUAol-5DxuH67sPhMlkRzg59JTQFeMj_T_oL4jikxc</recordid><startdate>20110822</startdate><enddate>20110822</enddate><creator>Pavel, O.D.</creator><creator>Cojocaru, B.</creator><creator>Angelescu, E.</creator><creator>Pârvulescu, V.I.</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20110822</creationdate><title>The activity of yttrium-modified Mg,Al hydrotalcites in the epoxidation of styrene with hydrogen peroxide</title><author>Pavel, O.D. ; Cojocaru, B. ; Angelescu, E. ; Pârvulescu, V.I.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c406t-4f7f7a4cdfae500401cf92f397b616a3bc8977b51eed86c81fd59caf77b70dad3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>Aluminum oxide</topic><topic>Catalysis</topic><topic>Catalysts</topic><topic>Chemistry</topic><topic>Correlation</topic><topic>Epoxidation</topic><topic>Exact sciences and technology</topic><topic>General and physical chemistry</topic><topic>Hydrogen peroxide</topic><topic>Hydrotalcite-like materials</topic><topic>Magnesium oxide</topic><topic>Memory effect</topic><topic>Styrene epoxidation</topic><topic>Styrenes</topic><topic>Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Pavel, O.D.</creatorcontrib><creatorcontrib>Cojocaru, B.</creatorcontrib><creatorcontrib>Angelescu, E.</creatorcontrib><creatorcontrib>Pârvulescu, V.I.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Applied catalysis. A, General</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Pavel, O.D.</au><au>Cojocaru, B.</au><au>Angelescu, E.</au><au>Pârvulescu, V.I.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The activity of yttrium-modified Mg,Al hydrotalcites in the epoxidation of styrene with hydrogen peroxide</atitle><jtitle>Applied catalysis. A, General</jtitle><date>2011-08-22</date><risdate>2011</risdate><volume>403</volume><issue>1</issue><spage>83</spage><epage>90</epage><pages>83-90</pages><issn>0926-860X</issn><eissn>1873-3875</eissn><abstract>[Display omitted]
► The introduction of yttrium in Mg,Al hydrotalcite occurs without its insertion in the Mg or Al octahedral positions. ► The lower electronegativity of yttrium led to an increase of the basicity. ► The memory effect plays an important role in the reconstruction of the LDH structure from the beginning of the reaction. ► Hydration of mixed oxides generates a worm texture and contributes to the decrease of the surface area. ► During reconstruction of the LDH under inert atmosphere part of carbonic anions are replaced by hydroxyl groups.
Modification of Mg,Al hydrotalcite with Y
3+ prepared following co-precipitation at low suprasaturation led to an improvement of the activity and selectivity for styrene epoxidation with hydrogen peroxide in acetonitrile. The materials were characterized using several techniques such as XRD, DRIFT, TEM, CO
2-TPD and adsorption–desorption isotherms of nitrogen at −196
°C. It was thus demonstrated that the memory effect of hydrotalcite acts very quickly even in an unfriendly environment like that generated by hydrogen peroxide. A direct correlation between the memory effect and the catalytic behavior in the epoxidation of the styrene has been demonstrated. MgO and Al
2O
3 were also prepared using the precipitation method. The investigation of MgO, Al
2O
3 and of a mechanic mixture of them showed that the activity of the catalysts in this reaction correlates very well with their basicity.</abstract><cop>Kidlington</cop><pub>Elsevier B.V</pub><doi>10.1016/j.apcata.2011.06.017</doi><tpages>8</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0926-860X |
| ispartof | Applied catalysis. A, General, 2011-08, Vol.403 (1), p.83-90 |
| issn | 0926-860X 1873-3875 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_1671420603 |
| source | Access via ScienceDirect (Elsevier) |
| subjects | Aluminum oxide Catalysis Catalysts Chemistry Correlation Epoxidation Exact sciences and technology General and physical chemistry Hydrogen peroxide Hydrotalcite-like materials Magnesium oxide Memory effect Styrene epoxidation Styrenes Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry |
| title | The activity of yttrium-modified Mg,Al hydrotalcites in the epoxidation of styrene with hydrogen peroxide |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-19T17%3A23%3A46IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_cross&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=The%20activity%20of%20yttrium-modified%20Mg,Al%20hydrotalcites%20in%20the%20epoxidation%20of%20styrene%20with%20hydrogen%20peroxide&rft.jtitle=Applied%20catalysis.%20A,%20General&rft.au=Pavel,%20O.D.&rft.date=2011-08-22&rft.volume=403&rft.issue=1&rft.spage=83&rft.epage=90&rft.pages=83-90&rft.issn=0926-860X&rft.eissn=1873-3875&rft_id=info:doi/10.1016/j.apcata.2011.06.017&rft_dat=%3Cproquest_cross%3E1671420603%3C/proquest_cross%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=1671420603&rft_id=info:pmid/&rft_els_id=S0926860X11003644&rfr_iscdi=true |