Hydrogenation of 1,3-butadiene with 1,3-cyclohexadiene and molecular deuterium over zirconium dioxide catalysts

Yamaguchi, Tsutomu; Hightower, Joe W.

doi:10.1021/ja00454a071

Cited by 67 publications

(13 citation statements)

References 6 publications

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“…The absence of any detectable exchange with ethene and 33DMB1 shows that these molecules do not readily undergo reversible dissociation to adsorbed vinyl species. Furthermore, if we accept that alkane formation occurs by the stepwise route through reactions ( 5) and ( 7), the alkyl reversal reaction (6) must be slow compared with (7). Behaviour of this kind was found for the reaction of ethene32 and ~y c l o p e n t e n e ~~ on zinc oxide, and for these systems the rate-determining step in the addition process was reaction (9, the formation of adsorbed alkyl.…”

Section: Exchange Results and Possible Mechanismsmentioning

confidence: 99%

Reactions of alkenes and the equilibration of hydrogen and deuterium on zirconia

Bird¹,

Kemball²,

Leach³

1987

J. Chem. Soc., Faraday Trans. 1

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The hydrogenation of various alkenes, the equilibration of H,/D, and the isomerisation of some C,-alkenes have been studied over a range of temperatures on zirconia catalysts. Products from the reaction of some of the alkenes with deuterium were examined by ,D n.m.r. spectroscopy. The rate of hydrogenation varied only to a small extent with the nature of the alkene, apart from some steric hindrance with some of the C,-compounds, and the supply of hydrogen to the surface appeared to be rate-determining. Reactions of alkenes with deuterium below 400 K gave D,-alkanes. As the temperature was raised, exchange of alkene was observed to an increasing extent, and the location of the deuterium atoms in the products provided evidence of possible mechanisms.

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Section: Exchange Results and Possible Mechanismsmentioning

confidence: 99%

Reactions of alkenes and the equilibration of hydrogen and deuterium on zirconia

Bird¹,

Kemball²,

Leach³

1987

J. Chem. Soc., Faraday Trans. 1

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“…Zirconia (or doped zirconia) dispersed in ceramics has long been applied to increase the fracture toughness, strength, and hardness [1 3]. A widely used catalyst and catalyst support, zirconia catalyzes alcohol dehydration [4,5], CO/CO 2 hydrogenation [6], alkane isomerization [7], selective oxidation of alcohols and alkanes [8,9], hydrogenation of olefins [10], and isomerization of olefi ns and epoxides [11,12]. Different zirconia phases (monoclinic and tetragonal) exhibit different catalyst selectivities, such as in the selective hydrogenation of CO and alkane isomerization reactions [13 15].…”

Section: Introductionmentioning

confidence: 99%

Fine tuning of the sizes and phases of ZrO2 nanocrystals

Wang

2009

Nano Res.

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Monodisperse and pure phase zirconia (tetragonal: T-ZrO 2 ; monoclinic: M-ZrO 2 ) nanocrystals with fi nely tuned sizes as well as ultrathin T-ZrO 2 nanowires have been selectively synthesized by a facile solvothermal method. For the fi rst time, a diagram of the size to effective strain was mapped for both T-ZrO 2 and M-ZrO 2 , which gives a good explanation for the size-and cation doping-dependent stability of the two phases on the sub-10 nm scale. This work may expand our understanding of the phase properties of not only zirconia, but also various other polymorphic nanocrystals.

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“…Zirconia is an important material with wide-ranging applications including as a high-performance transformation-toughened structural engineering ceramic and as a solid electrolyte [10,11]. Acid-base properties make this oxide suitable for important applications in catalytic processes such as paraffin isomerization, hydrogenation of olefins, and other technological applications [12,13]. Due to its nature as an n-type semiconductor, it has been considered recently as a photocatalyst in photochemical heterogeneous reactions [14].…”

Section: Introductionmentioning

confidence: 99%