Selective oxidation of alcohols with molecular oxygen over Ru/CaO–ZrO2 catalyst

Yasu-eda, Takashi; Kitamura, Susumu; Ikenaga, Naoki; Miyake, Takanori; Suzuki, Toshimitsu

doi:10.1016/j.molcata.2010.03.018

Cited by 48 publications

(18 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, the diffuse reflectance infrared Fourier transformed (DRIFT) spectrum of Ru/CeO 2 showed a characteristic peak at 980 cm −1 that could be assigned to the RuO vibration mode,18 while such a peak was not observed for RuO 2 and Ru catalysts supported on SiO 2 , Al 2 O 3 , TiO 2 or MgO as previously reported 6. On the other hand, the formation of Ru‐oxo species on ZrO 2 has been proposed previously 19,20. These results suggest that the combination of Ru with CeO 2 or ZrO 2 creates the highly dispersed Ru(IV)‐oxo species with a distorted coordination environment as shown in Scheme 5,18,19…”

Section: Resultsmentioning

confidence: 60%

Intermolecular Coupling of Alkynes with Acrylates by Recyclable Oxide‐Supported Ruthenium Catalysts: Formation of Distorted Ruthenium(IV)‐oxo Species on Ceria as a Key Precursor of Active Species

Miura¹,

Shimura²,

Hosokawa³

et al. 2011

Adv Synth Catal

View full text Add to dashboard Cite

A solid ceria-supported ruthenium catalyst (Ru/CeO 2 ) as well as a zirconia-supported ruthenium catalyst (Ru/ZrO 2 ) showed high activities toward the intermolecular coupling of alkynes with acrylates to give the corresponding 1,3-dienes in high yields. The reaction proceeded in the presence of sodium formate and both internal or terminal alkynes and norbornene could be applied for the catalytic systems. The solid ruthenium catalyst could be recycled for several times without significant loss of activity. The FT-IR and X-ray absorption fine structure (XAFS) studies of ceria-supported ruthenium catalysts showed that a distorted ruthenium(IV)-oxo species on ceria was transformed during the initial stage of the reaction into a low-valent ruthenium species that was effective for the coupling reactions.

show abstract

Section: Resultsmentioning

confidence: 60%

Intermolecular Coupling of Alkynes with Acrylates by Recyclable Oxide‐Supported Ruthenium Catalysts: Formation of Distorted Ruthenium(IV)‐oxo Species on Ceria as a Key Precursor of Active Species

Miura¹,

Shimura²,

Hosokawa³

et al. 2011

Adv Synth Catal

View full text Add to dashboard Cite

show abstract

“…A polyoxometalate–zirconia (POM/ZrO 2 ) nanocomposite has been reported for the selective oxidation of alcohols in the liquid phase . Zirconia‐supported CrO 3 or ruthenium‐supported on a CaO−ZrO 2 have been used for the oxidation of alcohols to aldehydes, whereas zirconium‐based metal–organic frameworks have been employed for the photocatalytic oxidation of alcohol under visible light . Zirconia‐supported sodium decatungstate (Na 4 W 10 O 32 /ZrO 2 ) led to the formation of carboxylic acids.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Comparative Catalytic Study of Zirconia-MnCO₃or -Mn₂O₃for the Oxidation of Benzylic Alcohols

et al. 2016

View full text Add to dashboard Cite

We report on the synthesis of the zirconia–manganese carbonate ZrO x (x %)–MnCO3 catalyst (where x=1–7) that, upon calcination at 500 °C, is converted to zirconia–manganese oxide ZrO x (x %)–Mn2O3. We also present a comparative study of the catalytic performance of the both catalysts for the oxidation of benzylic alcohol to corresponding aldehydes by using molecular oxygen as the oxidizing agent. ZrO x (x %)–MnCO3 was prepared through co‐precipitation by varying the amounts of Zr(NO3)4 (w/w %) in Mn(NO3)2. The morphology, composition, and crystallinity of the as‐synthesized product and the catalysts prepared upon calcination were studied by using scanning electron microscopy, transmission electron microscopy, energy‐dispersive X‐ray spectroscopy, and powder X‐ray diffraction. The surface areas of the catalysts [133.58 m2 g−1 for ZrO x (1 %)–MnCO3 and 17.48 m2 g−1 for ZrO x (1 %)–Mn2O3] were determined by using the Brunauer–Emmett–Teller method, and the thermal stability was assessed by using thermal gravimetric analysis. The catalyst with composition ZrO x (1 %)–MnCO3 pre‐calcined at 300 °C exhibited excellent specific activity (48.00 mmolg−1 h−1) with complete conversion within approximately 5 min and catalyst cyclability up to six times without any significant loss in activity. The specific activity, turnover number and turnover frequency achieved is the highest so far (to the best of our knowledge) compared to the previously reported catalysts used for the oxidation of benzyl alcohol. The catalyst showed selectivity for aromatic alcohols over aliphatic alcohols.

show abstract

“…No formation of acetophenone was observed in this case which indicates that the prepared catalyst plays a fundamental role in the aerial oxidation of 1-phenylethanol. In order to recognize the performance of the catalyst in comparison to the previously reported studies, a list of reported catalysts has been compiled as shown in Table 5, which demonstrates the results of 1-phenylethanol oxidation by molecular O 2 in the presence of various catalysts [3,8,9,15,36,52,[67][68][69][70][71][72][73][74][75][76][77][78][79][80]82]. It was found that the prepared 1% ZrO x -MnCO 3 catalyst is the utmost effective catalyst among all the mentioned catalysts.…”

Section: Effect Of Catalyst Amount On the Catalytic Performancementioning

confidence: 99%

Comparative Catalytic Evaluation of Nano-ZrO_x Promoted Manganese Catalysts: Kinetic Study and the Effect of Dopant on the Aerobic Oxidation of Secondary Alcohols

Assal

Kuniyil

Khan

et al. 2017

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

This work reports the zirconia (ZrO x ) nanoparticles doped MnCO 3 catalysts prepared by facile and simple coprecipitation technique and the synthesis of zirconia-manganese carbonate [X% ZrO x -MnCO 3 ] (where % = 0-7%) catalyst which upon calcination at 400 ∘ C is converted to zirconia-manganese dioxide [1% ZrO x -MnO 2 ] and when calcined at 500 ∘ C is converted to zirconiamanganic trioxide [1% ZrO x -Mn 2 O 3 ]. A comparative catalytic study was performed to investigate the catalytic efficiency between carbonate and oxides for the selective oxidation of 1-phenylethanol by using molecular O 2 as a clean oxidant. The influence of several parameters such as w/w% of ZrO x , reaction time, calcination temperature, catalyst amount, and reaction temperature has been thoroughly examined using oxidation of 1-phenylethanol as a model substrate. The 1% ZrO x -MnCO 3 precalcined at 300 ∘ C exhibited the best catalytic efficiency. It was found that ZrO x nanoparticles also play an essential role in enhancing the effectiveness of the catalytic system for the aerobic oxidation of alcohols. Furthermore, the physical and chemical properties of synthesized catalysts were evaluated by microscopic and spectroscopic techniques. An extremely high specific activity of 40 mmol⋅g −1 ⋅h −1 with a 100% conversion of oxidation product and selectivity of >99% was achieved within extremely short reaction time (6 min).

show abstract

Selective oxidation of alcohols with molecular oxygen over Ru/CaO–ZrO2 catalyst

Cited by 48 publications

References 49 publications

Intermolecular Coupling of Alkynes with Acrylates by Recyclable Oxide‐Supported Ruthenium Catalysts: Formation of Distorted Ruthenium(IV)‐oxo Species on Ceria as a Key Precursor of Active Species

Intermolecular Coupling of Alkynes with Acrylates by Recyclable Oxide‐Supported Ruthenium Catalysts: Formation of Distorted Ruthenium(IV)‐oxo Species on Ceria as a Key Precursor of Active Species

Synthesis and Comparative Catalytic Study of Zirconia-MnCO₃or -Mn₂O₃for the Oxidation of Benzylic Alcohols

Comparative Catalytic Evaluation of Nano-ZrO_x Promoted Manganese Catalysts: Kinetic Study and the Effect of Dopant on the Aerobic Oxidation of Secondary Alcohols

Contact Info

Product

Resources

About

Selective oxidation of alcohols with molecular oxygen over Ru/CaO–ZrO2 catalyst

Cited by 48 publications

References 49 publications

Intermolecular Coupling of Alkynes with Acrylates by Recyclable Oxide‐Supported Ruthenium Catalysts: Formation of Distorted Ruthenium(IV)‐oxo Species on Ceria as a Key Precursor of Active Species

Intermolecular Coupling of Alkynes with Acrylates by Recyclable Oxide‐Supported Ruthenium Catalysts: Formation of Distorted Ruthenium(IV)‐oxo Species on Ceria as a Key Precursor of Active Species

Synthesis and Comparative Catalytic Study of Zirconia-MnCO3or -Mn2O3for the Oxidation of Benzylic Alcohols

Comparative Catalytic Evaluation of Nano-ZrOx Promoted Manganese Catalysts: Kinetic Study and the Effect of Dopant on the Aerobic Oxidation of Secondary Alcohols

Contact Info

Product

Resources

About

Synthesis and Comparative Catalytic Study of Zirconia-MnCO₃or -Mn₂O₃for the Oxidation of Benzylic Alcohols

Comparative Catalytic Evaluation of Nano-ZrO_x Promoted Manganese Catalysts: Kinetic Study and the Effect of Dopant on the Aerobic Oxidation of Secondary Alcohols