Aerobic oxidation of monoterpenic alcohols catalyzed by ruthenium hydroxide supported on silica-coated magnetic nanoparticles

Costa, Vinícius V.; Jacinto, Marcos José; Rossi, Liane M.; Landers, Richard; Gusevskaya, Elena V.

doi:10.1016/j.jcat.2011.06.014

Cited by 66 publications

(40 citation statements)

References 47 publications

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“…It is apparent that this signal was almost 1 eV separated from the two peaks obtained for the other three samples. This suggests the presence of an oxidized form of ruthenium, possibly Ru(OH) x as previously reported by Costa et al [84]. Moreover, in the O 1s region (Figure 9c), three peaks were resolved from the red line fitted to the original data (gray dotted line).…”

Section: Synthesis and Characterization Of Zero-valent Ruthenium Nanosupporting

confidence: 84%

Solventless synthesis of ruthenium nanoparticles

García-Peña

Redón

Herrera-Gómez

et al. 2015

Applied Surface Science

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Section: Synthesis and Characterization Of Zero-valent Ruthenium Nanosupporting

confidence: 84%

Solventless synthesis of ruthenium nanoparticles

García-Peña

Redón

Herrera-Gómez

et al. 2015

Applied Surface Science

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“…Owing to the binding energy of Ru 3d orbital overlapping with the binding energy of C 1s, the Ru 3p orbital is chosen for the analysis [39,40]. Because the Ru 3p 3/2 peak area and the Ru 3p 1/2 peak area of the Ru species with the same valence states have a proportional relationship, and the area ratio of p 3/2 and p 1/2 is 2:1.…”

Section: Xps Spectramentioning

confidence: 99%

Hydrochlorination of Acetylene Catalyzed by an Activated Carbon-Supported Ammonium Hexachlororuthenate Complex

Gao

Zhang

et al. 2017

Catalysts

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Ammonium hexachlororuthenate ((NH 4 ) 2 RuCl 6 ) complex was used as a catalyst precursor and coconut activated carbon (AC) was used as the support in the preparation process of the Ru-based catalyst. (NH 4 ) 2 RuCl 6 /AC catalyst was prepared via an incipient wetness impregnation method and assessed in an acetylene hydrochlorination reaction. Meanwhile, the (NH 4 ) 2 RuCl 6 /AC catalyst was analyzed with low-temperature N 2 adsorption/desorption, thermogravimetry (TG), transmission electron microscopy (TEM), temperature programmed reduction (TPR), X-ray photoelectron spectra (XPS), and temperature programmed desorption (TPD) techniques. Catalytic performance test results show that the (NH 4 ) 2 RuCl 6 /AC catalyst exhibits a superior catalytic activity with the highest acetylene conversion of 90.5% under the conditions of 170 • C and an acetylene gas hourly space velocity of 180 h −1 . The characterization results illustrate that the presence of the NH 4 + cation can inhibit coke deposition as well as the agglomeration of ruthenium particles, and it can also enhance the adsorption ability for reactant HCl, hence improving the catalytic activity and stability.

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“…A magnetically recoverable catalysts based on Ru(OH)x was prepared by impregnation of Ru 3+ ions on the silica-coated magnetic support previously modified with amine groups followed by treatment with sodium hydroxide to form ruthenium hydroxide species. 85 The catalyst was used in the selective aerobic oxidation of alcohols, including terpenes, to the corresponding aldehydes. Various carbonylic monoterpenoids important for fragrance and pharmaceutical industries could be obtained in good to excellent yields starting from biomass-based monoterpenic alcohols, such as isoborneol, perillyl alcohol, carveol and citronellol.…”

Section: Ruthenium Catalystsmentioning

confidence: 99%

Recent advances in the development of magnetically recoverable metal nanoparticle catalysts

Rossi¹,

Garcia²,

Vono³

2012

J. Braz. Chem. Soc.

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O objetivo deste Account é fornecer uma visão geral de nossas atividades atuais de pesquisa, as quais envolvem a síntese e modificação de nanomateriais superparamagnéticos para aplicação na área de separação magnética e catálise. Primeiramente, uma introdução ao magnetismo e à separação magnética é feita. Em seguida, estratégias sintéticas que têm sido desenvolvidas para gerar nanopartículas superparamagnéticas revestidas esfericamente por sílica e outros óxidos, com destaque a sistemas bem caracterizados e preparados por metodologias que geram amostras de elevada qualidade e que, a princípio, podem ser produzidas em maior escala, são discutidas. Uma série de catalisadores magneticamente recuperáveis preparados em nosso grupo de pesquisa pela combinação única de suportes superparamagnéticos e nanopartículas metálicas é destacada. Este Account é concluído com observações pessoais e perspectivas neste campo de pesquisa.The aim of this Account is to provide an overview of our current research activities on the design and modification of superparamagnetic nanomaterials for application in the field of magnetic separation and catalysis. First, an introduction of magnetism and magnetic separation is done. Then, the synthetic strategies that have been developed for generating superparamagnetic nanoparticles spherically coated by silica and other oxides, with a focus on well characterized systems prepared by methods that generate samples of high quality and easy to scale-up, are discussed. A set of magnetically recoverable catalysts prepared in our research group by the unique combination of superparamagnetic supports and metal nanoparticles is highlighted. This Account is concluded with personal remarks and perspectives on this research field.

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Aerobic oxidation of monoterpenic alcohols catalyzed by ruthenium hydroxide supported on silica-coated magnetic nanoparticles

Cited by 66 publications

References 47 publications

Solventless synthesis of ruthenium nanoparticles

Solventless synthesis of ruthenium nanoparticles

Hydrochlorination of Acetylene Catalyzed by an Activated Carbon-Supported Ammonium Hexachlororuthenate Complex

Recent advances in the development of magnetically recoverable metal nanoparticle catalysts

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