In situ Study of Structural Transformations of the Active Phase of VMoNbTeO Catalysts under Reduction Conditions
VMoNbTeO catalysts show high activity in the reactions of selective oxidation of ethane and propane. Time-resolved X-ray diffraction is used to study structural transformations of a mixed oxide with the composition (TeO) 0.18 (Mo 0.7 V 0.22 Nb 0.08 ) 20 O 56 and the structure of the active M1 phase...
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| Veröffentlicht in: | Journal of structural chemistry 2019-10, Vol.60 (10), p.1599-1611 |
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| container_title | Journal of structural chemistry |
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| creator | Kardash, T. Yu Marchuk, A. S. Ishchenko, A. V. Simanenko, A. A. Lazareva, E. V. Svintsitskiy, D. A. |
| description | VMoNbTeO catalysts show high activity in the reactions of selective oxidation of ethane and propane. Time-resolved X-ray diffraction is used to study structural transformations of a mixed oxide with the composition (TeO)
0.18
(Mo
0.7
V
0.22
Nb
0.08
)
20
O
56
and the structure of the active M1 phase upon heating in a hydrogen atmosphere (1% H
2
in helium). It is shown that the structure of the M1 phase is destroyed in the presence of a reducing agent above 480 °C. The process is accompanied by structural distortions, diminishing of the size of crystalline blocks, elimination of tellurium (due to the reduction and sublimation), and the reduction by molybdenum and vanadium cations. As a result, VMoNb oxides with a disordered structure are formed and rapidly crystallized at
T
> 480 °C into the rutile-type monoclinic oxide (Mo,V,Nb)O
2
with a variable composition. X-ray photoelectron spectroscopy and transmission electron microscopy data confirm heterogeneous compositions of oxides formed by the decomposition of the initial phase. The surface of the formed particles is enriched with vanadium and niobium present in the composition of the oxides with disordered structure. |
| doi_str_mv | 10.1134/S0022476619100056 |
| format | Article |
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0.18
(Mo
0.7
V
0.22
Nb
0.08
)
20
O
56
and the structure of the active M1 phase upon heating in a hydrogen atmosphere (1% H
2
in helium). It is shown that the structure of the M1 phase is destroyed in the presence of a reducing agent above 480 °C. The process is accompanied by structural distortions, diminishing of the size of crystalline blocks, elimination of tellurium (due to the reduction and sublimation), and the reduction by molybdenum and vanadium cations. As a result, VMoNb oxides with a disordered structure are formed and rapidly crystallized at
T
> 480 °C into the rutile-type monoclinic oxide (Mo,V,Nb)O
2
with a variable composition. X-ray photoelectron spectroscopy and transmission electron microscopy data confirm heterogeneous compositions of oxides formed by the decomposition of the initial phase. The surface of the formed particles is enriched with vanadium and niobium present in the composition of the oxides with disordered structure.</description><identifier>ISSN: 0022-4766</identifier><identifier>EISSN: 1573-8779</identifier><identifier>DOI: 10.1134/S0022476619100056</identifier><language>eng</language><publisher>Moscow: Pleiades Publishing</publisher><subject>Atomic ; Atomic/Molecular Structure and Spectra ; Catalysts ; Chemistry ; Chemistry and Materials Science ; Composition ; Crystallization ; Ethane ; Inorganic Chemistry ; Molecular ; Molybdenum ; Niobium ; Optical and Plasma Physics ; Oxidation ; Oxides ; Photoelectrons ; Physical Chemistry ; Reducing agents ; Reduction ; Solid State Physics ; Sublimation ; Tellurium ; Transformations ; Vanadium</subject><ispartof>Journal of structural chemistry, 2019-10, Vol.60 (10), p.1599-1611</ispartof><rights>Pleiades Publishing, Ltd. 2019</rights><rights>Copyright Springer Nature B.V. 2019</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c316t-bed6ec6fdb1e4eeb346fb478cf48ee45457c6737b1e199eea7d14e8b8a84a22c3</citedby><cites>FETCH-LOGICAL-c316t-bed6ec6fdb1e4eeb346fb478cf48ee45457c6737b1e199eea7d14e8b8a84a22c3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1134/S0022476619100056$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1134/S0022476619100056$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27901,27902,41464,42533,51294</link.rule.ids></links><search><creatorcontrib>Kardash, T. Yu</creatorcontrib><creatorcontrib>Marchuk, A. S.</creatorcontrib><creatorcontrib>Ishchenko, A. V.</creatorcontrib><creatorcontrib>Simanenko, A. A.</creatorcontrib><creatorcontrib>Lazareva, E. V.</creatorcontrib><creatorcontrib>Svintsitskiy, D. A.</creatorcontrib><title>In situ Study of Structural Transformations of the Active Phase of VMoNbTeO Catalysts under Reduction Conditions</title><title>Journal of structural chemistry</title><addtitle>J Struct Chem</addtitle><description>VMoNbTeO catalysts show high activity in the reactions of selective oxidation of ethane and propane. Time-resolved X-ray diffraction is used to study structural transformations of a mixed oxide with the composition (TeO)
0.18
(Mo
0.7
V
0.22
Nb
0.08
)
20
O
56
and the structure of the active M1 phase upon heating in a hydrogen atmosphere (1% H
2
in helium). It is shown that the structure of the M1 phase is destroyed in the presence of a reducing agent above 480 °C. The process is accompanied by structural distortions, diminishing of the size of crystalline blocks, elimination of tellurium (due to the reduction and sublimation), and the reduction by molybdenum and vanadium cations. As a result, VMoNb oxides with a disordered structure are formed and rapidly crystallized at
T
> 480 °C into the rutile-type monoclinic oxide (Mo,V,Nb)O
2
with a variable composition. X-ray photoelectron spectroscopy and transmission electron microscopy data confirm heterogeneous compositions of oxides formed by the decomposition of the initial phase. The surface of the formed particles is enriched with vanadium and niobium present in the composition of the oxides with disordered structure.</description><subject>Atomic</subject><subject>Atomic/Molecular Structure and Spectra</subject><subject>Catalysts</subject><subject>Chemistry</subject><subject>Chemistry and Materials Science</subject><subject>Composition</subject><subject>Crystallization</subject><subject>Ethane</subject><subject>Inorganic Chemistry</subject><subject>Molecular</subject><subject>Molybdenum</subject><subject>Niobium</subject><subject>Optical and Plasma Physics</subject><subject>Oxidation</subject><subject>Oxides</subject><subject>Photoelectrons</subject><subject>Physical Chemistry</subject><subject>Reducing agents</subject><subject>Reduction</subject><subject>Solid State Physics</subject><subject>Sublimation</subject><subject>Tellurium</subject><subject>Transformations</subject><subject>Vanadium</subject><issn>0022-4766</issn><issn>1573-8779</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNp1kN1LwzAUxYMoOKd_gG8Bn6v5apI-juLHYDpx09eStreuY2tmkgr7702d4IP4dC_3d865cBC6pOSaUi5uFoQwJpSUNKOEkFQeoRFNFU-0UtkxGg04GfgpOvN-HSWZzuQI7aYd9m3o8SL09R7bJi6ur0LvzAYvnel8Y93WhNZ2fqBhBXhShfYT8PPKeBhub4_2qVzCHOcmmM3eB4_7rgaHX6COUdGKc9vV7XfIOTppzMbDxc8co9e722X-kMzm99N8MksqTmVISqglVLKpSwoCoORCNqVQumqEBhCpSFUlFVcR0ywDMKqmAnSpjRaGsYqP0dUhd-fsRw8-FGvbuy6-LBinjBPCmY4qelBVznrvoCl2rt0aty8oKYZiiz_FRg87eHzUdu_gfpP_N30BsYN7wQ</recordid><startdate>20191001</startdate><enddate>20191001</enddate><creator>Kardash, T. Yu</creator><creator>Marchuk, A. S.</creator><creator>Ishchenko, A. V.</creator><creator>Simanenko, A. A.</creator><creator>Lazareva, E. V.</creator><creator>Svintsitskiy, D. A.</creator><general>Pleiades Publishing</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>20191001</creationdate><title>In situ Study of Structural Transformations of the Active Phase of VMoNbTeO Catalysts under Reduction Conditions</title><author>Kardash, T. Yu ; Marchuk, A. S. ; Ishchenko, A. V. ; Simanenko, A. A. ; Lazareva, E. V. ; Svintsitskiy, D. A.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c316t-bed6ec6fdb1e4eeb346fb478cf48ee45457c6737b1e199eea7d14e8b8a84a22c3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Atomic</topic><topic>Atomic/Molecular Structure and Spectra</topic><topic>Catalysts</topic><topic>Chemistry</topic><topic>Chemistry and Materials Science</topic><topic>Composition</topic><topic>Crystallization</topic><topic>Ethane</topic><topic>Inorganic Chemistry</topic><topic>Molecular</topic><topic>Molybdenum</topic><topic>Niobium</topic><topic>Optical and Plasma Physics</topic><topic>Oxidation</topic><topic>Oxides</topic><topic>Photoelectrons</topic><topic>Physical Chemistry</topic><topic>Reducing agents</topic><topic>Reduction</topic><topic>Solid State Physics</topic><topic>Sublimation</topic><topic>Tellurium</topic><topic>Transformations</topic><topic>Vanadium</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Kardash, T. Yu</creatorcontrib><creatorcontrib>Marchuk, A. S.</creatorcontrib><creatorcontrib>Ishchenko, A. V.</creatorcontrib><creatorcontrib>Simanenko, A. A.</creatorcontrib><creatorcontrib>Lazareva, E. V.</creatorcontrib><creatorcontrib>Svintsitskiy, D. A.</creatorcontrib><collection>CrossRef</collection><jtitle>Journal of structural chemistry</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Kardash, T. Yu</au><au>Marchuk, A. S.</au><au>Ishchenko, A. V.</au><au>Simanenko, A. A.</au><au>Lazareva, E. V.</au><au>Svintsitskiy, D. A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>In situ Study of Structural Transformations of the Active Phase of VMoNbTeO Catalysts under Reduction Conditions</atitle><jtitle>Journal of structural chemistry</jtitle><stitle>J Struct Chem</stitle><date>2019-10-01</date><risdate>2019</risdate><volume>60</volume><issue>10</issue><spage>1599</spage><epage>1611</epage><pages>1599-1611</pages><issn>0022-4766</issn><eissn>1573-8779</eissn><abstract>VMoNbTeO catalysts show high activity in the reactions of selective oxidation of ethane and propane. Time-resolved X-ray diffraction is used to study structural transformations of a mixed oxide with the composition (TeO)
0.18
(Mo
0.7
V
0.22
Nb
0.08
)
20
O
56
and the structure of the active M1 phase upon heating in a hydrogen atmosphere (1% H
2
in helium). It is shown that the structure of the M1 phase is destroyed in the presence of a reducing agent above 480 °C. The process is accompanied by structural distortions, diminishing of the size of crystalline blocks, elimination of tellurium (due to the reduction and sublimation), and the reduction by molybdenum and vanadium cations. As a result, VMoNb oxides with a disordered structure are formed and rapidly crystallized at
T
> 480 °C into the rutile-type monoclinic oxide (Mo,V,Nb)O
2
with a variable composition. X-ray photoelectron spectroscopy and transmission electron microscopy data confirm heterogeneous compositions of oxides formed by the decomposition of the initial phase. The surface of the formed particles is enriched with vanadium and niobium present in the composition of the oxides with disordered structure.</abstract><cop>Moscow</cop><pub>Pleiades Publishing</pub><doi>10.1134/S0022476619100056</doi><tpages>13</tpages></addata></record> |
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| source | Springer Nature - Complete Springer Journals |
| subjects | Atomic Atomic/Molecular Structure and Spectra Catalysts Chemistry Chemistry and Materials Science Composition Crystallization Ethane Inorganic Chemistry Molecular Molybdenum Niobium Optical and Plasma Physics Oxidation Oxides Photoelectrons Physical Chemistry Reducing agents Reduction Solid State Physics Sublimation Tellurium Transformations Vanadium |
| title | In situ Study of Structural Transformations of the Active Phase of VMoNbTeO Catalysts under Reduction Conditions |
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