Solvent-free aerobic oxidation of benzyl alcohol over Pd monometallic and Au–Pd bimetallic catalysts supported on SBA-16 mesoporous molecular sieves

Chen, Yuanting; Lim, Huimin; Tang, Qinghu; Gao, Yating; Sun, Tongming; Yan, Qingyu; Yang, Yanhui

doi:10.1016/j.apcata.2010.03.026

Cited by 170 publications

(40 citation statements)

References 52 publications

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“…Moreover, ar emarkable TOF of 18 800 h À1 for 1-phenylethanolo xidation was achieved by zeolite-supported Pd nanoparticles with am ean diameter of 2.8 nm. [7] Mesoporous SBA-16, [8] surface-modified TUD-1, [9] and amorphous MnCeO x [10] also showed extraordinary activity in Pd-catalyzeds olvent-free benzyl alcoholo xidation reactions, with TOF values of 14 438, 18 571, and 7858 h…”

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confidence: 95%

“…The catalytic performance for aerobic alcohol oxidation in the absence of solvent and additives was evaluated to show that titanate nanobelts are ah ighly efficient support for Pd-catalyzed solvent-free oxidation of various alcohols. Figure 1s hows the XRD patterns of the as-synthesized nanobelt support.C omplete conversiono fc ommercial TiO 2 to al ayered titanates tructure was observed with the typical strong diffraction peak around 2q = 108,w hichi ndicated ai nterlayer distance of approximately 8 . [26,27] After calcination at 500 8C, the interlayer distance was shortened to approximately 7.24 w ith ad iffraction peak at about 2q = 128.T his could be ascribed to the loss of intercalated water and partial conversion into hexatitanate.…”

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confidence: 98%

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Palladium Nanoparticles Supported on Titanate Nanobelts for Solvent‐Free Aerobic Oxidation of Alcohols

Zhu

Liu

et al. 2015

ChemCatChem

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The solvent‐free selective oxidation of alcohols by O2 without any additives has been studied using palladium nanoparticles supported on a titanate nanobelt. The catalysts were prepared by polyol reduction and impregnation with different kinds of supports. They were evaluated in oxidation reactions of benzyl alcohol. The calcined titanate nanobelt was found to be the best support for the solvent‐free Pd‐catalyzed oxidation of alcohols and excellent catalytic activity as well as high selectivity to the corresponding benzaldehyde could be obtained. Moreover, palladium nanoparticles immobilized on the calcined titanate nanobelt could completely suppress the formation of toluene and benzoic acid, an effect that might be caused by the enhanced basic nature and morphology of the support. The catalyst was not only active and selective towards carbonyl compounds, but also recyclable under the oxidation conditions. This catalyst was also applicable for the oxidation of other alcohols.

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confidence: 95%

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confidence: 98%

Palladium Nanoparticles Supported on Titanate Nanobelts for Solvent‐Free Aerobic Oxidation of Alcohols

Zhu

Liu

et al. 2015

ChemCatChem

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“…It is interesting to tune the catalytic performance by using supported alloy catalysts [228][229][230][231][232][233][234]. For instance, Crooks and co-workers synthesized PdAu/TiO 2 using dendrimer-encapsulated alloy nanoparticles as the precursor, and found that the activities of the catalysts in CO oxidation followed the sequence PdAu/TiO 2 > Pd/TiO 2 > Au/TiO 2 [235].…”

Section: In Situ Transformation Of Niau/sio2 Into Au-niomentioning

confidence: 99%

Development of novel supported gold catalysts: A materials perspective

2010

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Since Haruta et al. discovered that small gold nanoparticles finely dispersed on certain metal oxide supports can exhibit surprisingly high activity in CO oxidation below room temperature, heterogeneous catalysis by supported gold nanoparticles has attracted tremendous attention. The majority of publications deal with the preparation and characterization of conventional gold catalysts (e.g., Au/TiO 2 ), the use of gold catalysts in various catalytic reactions, as well as elucidation of the nature of the active sites and reaction mechanisms. In this overview, we highlight the development of novel supported gold catalysts from a materials perspective. Examples, mostly from those reported by our group, are given concerning the development of simple gold catalysts with single metal-support interfaces and heterostructured gold catalysts with complicated interfacial structures. Catalysts in the first category include active Au/SiO 2 and Au/metal phosphate catalysts, and those in the second category include catalysts prepared by pre-modification of supports before loading gold, by post-modification of supported gold catalysts, or by simultaneous dispersion of gold and an inorganic component onto a support. CO oxidation has generally been employed as a probe reaction to screen the activities of these catalysts. These novel gold catalysts not only provide possibilities for applied catalysis, but also furnish grounds for fundamental research.

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“…Highly ordered silica material SBA-16 with cage-like mesopores was synthesized and used to confine the formation of Au-Pd bimetallic nanoparticles [122]. Surface functionalized SBA-16 with APTES (3-aminopropyl triethoxysilane) was positively charged due to the hydrolysis of -NH 2 groups, which allowed easy adsorption of negatively charged PdCl 2 (OH) 2 2´a nd AuCl 4´a t 80˝C for 5 h.…”

Section: Embedding After Matrix Synthesismentioning

confidence: 99%

Chemical Preparation of Supported Bimetallic Catalysts. Gold-Based Bimetallic, a Case Study

Louis

2016

Catalysts

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This review focuses on the chemical methods used to prepare supported bimetallic heterogeneous catalysts, i.e., bimetallic nanoparticles deposited on a support. The review is limited to the preparation of gold-based bimetallic catalysts and moreover to bimetallic nanoparticles supported on powder inorganic supports, i.e., on the surface or in the porosity, and not on model supports such as single crystals.

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Solvent-free aerobic oxidation of benzyl alcohol over Pd monometallic and Au–Pd bimetallic catalysts supported on SBA-16 mesoporous molecular sieves

Cited by 170 publications

References 52 publications

Palladium Nanoparticles Supported on Titanate Nanobelts for Solvent‐Free Aerobic Oxidation of Alcohols

Palladium Nanoparticles Supported on Titanate Nanobelts for Solvent‐Free Aerobic Oxidation of Alcohols

Development of novel supported gold catalysts: A materials perspective

Chemical Preparation of Supported Bimetallic Catalysts. Gold-Based Bimetallic, a Case Study

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