Au–Pd nanoparticles on layered double hydroxide: Highly active catalyst for aerobic oxidation of alcohols in aqueous phase

Shi, Yu; Yang, Hanmin; Zhao, Xiuge; Cao, Ting; Chen, Jizhong; Zhu, Wenwen; Yu, Yonggang; Hou, Zhenshan

doi:10.1016/j.catcom.2011.12.003

Cited by 44 publications

(25 citation statements)

References 26 publications

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“…56,69 This was also seen in the case of benzyl alcohols aerobically oxidized in water over polymer stabilized Au nanoclusters. Indeed, while solvents mainly affect the kinetics of the reaction, non-polar (and therefore non-coordinating) solvents tending to give faster rates 52 , in the case of water product selectivity is also affected.…”

Section: Solvent Effects and Scope Of Substratesmentioning

confidence: 64%

“…62,69,70 Inspired by the findings of Prati 71 and Hutchings 72 in the selective oxidation of D-sorbitol and alcohols, respectively, Shi et al 69 performed aerobic alcohol oxidations over HT supported bimetallic catalysts in water. 62,69,70 Inspired by the findings of Prati 71 and Hutchings 72 in the selective oxidation of D-sorbitol and alcohols, respectively, Shi et al 69 performed aerobic alcohol oxidations over HT supported bimetallic catalysts in water.…”

Section: Novel Alloysmentioning

confidence: 99%

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Catalytic oxidation of alcohols to carbonyl compounds over hydrotalcite and hydrotalcite-supported catalysts

Mobley

Crocker

2015

RSC Adv.

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The oxidation of alcohols to carbonyl compounds is an important reaction in synthetic organic chemistry. While stoichiometric oxidants are effective for this transformation, they often produce large amounts of toxic waste, which renders them unacceptable from an environmental and economic perspective. Consequently, there is a strong impetus to develop catalytic processes that utilize environmentally friendly, inexpensive primary oxidants, the use of molecular oxygen being particularly attractive. Recently, hydrotalcites have attracted attention as both catalysts and catalyst supports for the selective oxidation of alcohols to ketones and aldehydes, using either oxygen or TBHP as the oxidant. This review is intended to provide a comprehensive summary of work performed in this area to date. The effects of composition and structure on catalyst properties are highlighted, and mechanistic aspects are discussed. 2HTs as catalyst Ru containing HTsRuthenium is recognized to have excellent catalytic properties in the oxidation of a variety of organic functional groups, including alcohols. For example, rutheniumcontaining organometallic complexes are well known for their ability to catalyze alcohol oxidations using O 2 as the sole oxidant. 13 However, for ease of product work-up, heterogeneous catalysts are generally preferred to homogeneous catalysts. Recent examples of supported Ru catalysts have been provided by Liu and coworkers 14, 15 who performed the selective oxidation of 5-hydroxymethylfurfural (HMF) to 2,5diformylfuran (DFF) using carbon-supported Ru in the presence of O 2 . Similarly, Takagaki et al. 16 reported the use of Ru/HT for the aerobic oxidation of HMF to DFF. In comparison with other supported Ru catalysts such as Ru/C, Ru/Mg(OH) 2 , and Ru/Al 2 O 3 , Ru/HT had the highest activity and selectivity.While the catalytic properties of hydrotalcites (HTs) have attracted interest for many years, their use in alcohol oxidations is a relatively recent development. 12 The first such study appeared in 1988 and concerned the photocatalytic oxidation of isopropanol to acetone by polyoxometallate intercalated HT (vide infra). 17 Roughly a decade later reports were published concerning the use of isomorphically substituted HTs for the oxidation of alcohols under non-photocatalytic conditions. In the initial article by Kaneda et al. 18 , Mg-Al-HT was isomorphically substituted with Ru to obtain Ru-HTs with various interlayer anions for the aerobic oxidation of cinnamyl alcohol, CO 3 2having the highest activity of all the anions tested. The same authors indicated that they had also screened HTs isomorphically substituted with Fe, Ni, Mn, V, and Cr in addition to Ru, Ru substituted HTs having the highest activity; however, no data were presented for the other catalysts mentioned. Building on this work, Kaneda and co-workers 19 subsequently evaluated a series of transition metal containing Ru-HTs for the aerobic oxidation of cinnamyl alcohol. Divalent transition metal ions were substituted for Mg in the HT structure (...

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Section: Solvent Effects and Scope Of Substratesmentioning

confidence: 64%

Section: Novel Alloysmentioning

confidence: 99%

Catalytic oxidation of alcohols to carbonyl compounds over hydrotalcite and hydrotalcite-supported catalysts

Mobley

Crocker

2015

RSC Adv.

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“…To improve catalyst performance, heat treatment or thermal activation is considered a crucial process. Clear effects on the metal were observed due to the heat treatment, with regards to morphology of particle surface, particle size distribution and metal distribution on the support [33,26]. Three different thermal activation procedures were employed for the 1 wt% (Au-Pd)/TiO2 catalysts sample: (i) a tem- Figure 6.…”

Section: Impact Of Heat Treatment Processmentioning

confidence: 99%

The Impact of Hydrogen Peroxide as An Oxidant for Solvent-free Liquid Phase Oxidation of Benzyl Alcohol using Au-Pd Supported Carbon and Titanium Catalysts

Tareq¹,

Saiman²,

Hin³

et al. 2018

Bull. Chem. React. Eng. Catal.

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The solvent free oxidation of benzyl alcohol was conducted employing Au and Pd supported catalysts, while utilizing hydrogen peroxide 35% (H2O2) as the oxidant, H2O2 is very cheap, mild, and an environment friendly reagent, which produced water as the only by-product. Various proportions of Au-Pd catalysts on carbon and titanium oxide activated as supports were synthesized through the use of sol immobilization catalyst synthesis technique. Characterization of the synthesized catalysts was performed using X-Ray Diffraction (XRD), Brunauer-Emmett-Teller (BET), Field Emission Scanning Electron Microscopy (FESEM), and Transmission Electron Microscopy (TEM). It was found that the synthesized Au-Pd/ activated carbon catalyst was beneficial for the solvent free oxidation of benzyl alcohol after its containing high surface area measuring 871 m2g-1. Analysis of the TEM data and particle dimension revealed smaller and narrower particle size of 1 wt%. Thus, the distribution of Au-Pd/C was attained. Carbon-supported bimetallic catalysts presented a higher conversion compared to catalysts that are supported titanium oxide (TiO2) for for the oxidation reaction of benzyl alcohol. It was determined that this technique was a suitable process for catalyst synthesis with high selectivity, same distribution of the particle size and activations. Copyright © 2018 BCREC Group. All rights reservedReceived: 8th May 2017; Revised: 22nd February 2018; Accepted: 6th March 2018; Available online: 11st June 2018; Published regularly: 1st August 2018How to Cite: Sanaa Tareq, S., Saiman, M.I., Yun Hin, T.Y., Abdullah, A.H., Rashid, U. (2018). The Impact of Hydrogen Peroxide as An Oxidant for Solvent-free Liquid Phase Oxidation of Benzyl Alcohol using Au-Pd Supported Carbon and Titanium Catalysts. Bulletin of Chemical Reaction Engineering & Catalysis, 13 (2): 373-385 (doi:10.9767/bcrec.13.2.1204.373-385)

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“…Moreover, after appropriate treatments these mixed oxides contain well dispersed metal particles in strong interaction with the mixed oxide support (e.g. Pd/ Mg(Al)O) (Takehira and Shishido, 2007;Tichit et al, 2007;Gérardin et al, 2008;Shi et al, 2012;Cunha et al, 2013).…”

Section: Figure -mentioning

confidence: 99%

Integrative strategies to hybrid lamellar compounds: an integration challenge

Fernandes

Baradari

Sánchez

2014

Applied Clay Science

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Au–Pd nanoparticles on layered double hydroxide: Highly active catalyst for aerobic oxidation of alcohols in aqueous phase

Cited by 44 publications

References 26 publications

Catalytic oxidation of alcohols to carbonyl compounds over hydrotalcite and hydrotalcite-supported catalysts

Catalytic oxidation of alcohols to carbonyl compounds over hydrotalcite and hydrotalcite-supported catalysts

The Impact of Hydrogen Peroxide as An Oxidant for Solvent-free Liquid Phase Oxidation of Benzyl Alcohol using Au-Pd Supported Carbon and Titanium Catalysts

Integrative strategies to hybrid lamellar compounds: an integration challenge

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