Mo–V–O nanocrystals synthesized in the confined space of a mesoporous carbon

[Display omitted] •Synthesis of a nanocrystalline Mo-V oxide catalyst (Nano-MoVO) is demonstrated.•Nano-MoVO possesses a structure resembling orthorhombic MoVO.•Nano-MoVO facilitates ODH of propane and improves selectivity.•Nano-MoVO exhibited >20 % higher selectivity to propene than other MoVO c...

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Veröffentlicht in:Applied catalysis. A, General General, 2021-08, Vol.624, p.118294, Article 118294
Hauptverfasser: Obunai, Ryo, Tamura, Keisuke, Ogino, Isao, Mukai, Shin R., Ueda, Wataru
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container_start_page 118294
container_title Applied catalysis. A, General
container_volume 624
creator Obunai, Ryo
Tamura, Keisuke
Ogino, Isao
Mukai, Shin R.
Ueda, Wataru
description [Display omitted] •Synthesis of a nanocrystalline Mo-V oxide catalyst (Nano-MoVO) is demonstrated.•Nano-MoVO possesses a structure resembling orthorhombic MoVO.•Nano-MoVO facilitates ODH of propane and improves selectivity.•Nano-MoVO exhibited >20 % higher selectivity to propene than other MoVO catalysts. Ternary Mo–V oxide nanocrystals (Nano-MoVO) were hydrothermally synthesized in the confined space of a mesoporous carbon template and tested in the oxidative dehydrogenation (ODH) of ethane and propane. The synthesized nanocrystals are approximately 60 nm in length, 20 nm in diameter on average, and possess a structure resembling orthorhombic MoVO (Orth-MoVO) as indicated by spectroscopic and microscopy characterization. The Nano-MoVO catalyst has a 5-fold higher mesopore volume and a 4-fold larger external surface area than an Orth-MoVO synthesized by a conventional method (Orth-MoVO) as characterized through N2 adsorption analysis. Nano-MoVO shows similar activation energy in the ODH of ethane compared with other conventional MoVO catalysts. However, Nano-MoVO exhibits significantly higher propane/ethane activation rate ratio and higher propene selectivity even in the absence of elements such as Te and Nb that suppress overoxidation of propane-derived species to COx. The results suggest the benefits of the nanocrystalline morphology to limit overoxidation.
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Ternary Mo–V oxide nanocrystals (Nano-MoVO) were hydrothermally synthesized in the confined space of a mesoporous carbon template and tested in the oxidative dehydrogenation (ODH) of ethane and propane. The synthesized nanocrystals are approximately 60 nm in length, 20 nm in diameter on average, and possess a structure resembling orthorhombic MoVO (Orth-MoVO) as indicated by spectroscopic and microscopy characterization. The Nano-MoVO catalyst has a 5-fold higher mesopore volume and a 4-fold larger external surface area than an Orth-MoVO synthesized by a conventional method (Orth-MoVO) as characterized through N2 adsorption analysis. Nano-MoVO shows similar activation energy in the ODH of ethane compared with other conventional MoVO catalysts. However, Nano-MoVO exhibits significantly higher propane/ethane activation rate ratio and higher propene selectivity even in the absence of elements such as Te and Nb that suppress overoxidation of propane-derived species to COx. 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A, General</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Obunai, Ryo</au><au>Tamura, Keisuke</au><au>Ogino, Isao</au><au>Mukai, Shin R.</au><au>Ueda, Wataru</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Mo–V–O nanocrystals synthesized in the confined space of a mesoporous carbon</atitle><jtitle>Applied catalysis. A, General</jtitle><date>2021-08-25</date><risdate>2021</risdate><volume>624</volume><spage>118294</spage><pages>118294-</pages><artnum>118294</artnum><issn>0926-860X</issn><eissn>1873-3875</eissn><abstract>[Display omitted] •Synthesis of a nanocrystalline Mo-V oxide catalyst (Nano-MoVO) is demonstrated.•Nano-MoVO possesses a structure resembling orthorhombic MoVO.•Nano-MoVO facilitates ODH of propane and improves selectivity.•Nano-MoVO exhibited &gt;20 % higher selectivity to propene than other MoVO catalysts. 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subjects Alkane oxidation
Carbon
Catalysts
Confined space synthesis
Confined spaces
Dehydrogenation
Ethane
Mesoporous carbon
Morphology
Mo–V mixed oxide
Nano crystal
Nanocrystals
Propane
Selectivity
Synthesis
title Mo–V–O nanocrystals synthesized in the confined space of a mesoporous carbon
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