Nanoparticulate Ru on TiO2 exposed the {1 0 0} facets: Support facet effect on selective hydrogenation of benzene to cyclohexene

Zhou, Gongbing; Jiang, Lan; He, Daiping

doi:10.1016/j.jcat.2018.11.032

Cited by 32 publications

(31 citation statements)

References 47 publications

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“…30,31 Besides, The broad peak at 3450 cm -1 and 1629 cm -1 were assigned to the stretching vibration and bending vibration of O-H bond in absorbed water respectively, 32,33 while the weak peak at around 2924 cm -1 is probably assigned to carbonaceous contaminants. 34 Hence, all these observations are consistent with the XRD results, indicating that the zeolite HY nanocrystals are well grafted onto the titania nanofibres. However, with an increase of the crystallization temperature, the absorption peak of the strong acid site was shifted to the weak acid site.…”

Section: Conversion (%) =supporting

confidence: 86%

Aqueous-Phase Cellulose Hydrolysis over Zeolite HY Nanocrystals Grafted on Anatase Titania Nanofibers

et al. 2020

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In the past decades, renewable biomass has attracted attention as an alternative energy source for limited fossil fuels. As a huge amount of non-food biomass renewable energy source, the hydrolysis of cellulose to glucose by heterogeneous solid acids catalysts has caused increasing research interest. Herein we synthesized the zeolite HY nanocrystals grafted titania nanofibres (HY-TiO 2 ) with controlled crystal sizes, which could catalyze the hydrolysis of cellulose to glucose in aqueous solutions at relatively low temperatures (100-130 o C). Characterization results XRD, TEM and FT-IR demonstrated that fine the zeolite HY nanocrystals and stable and well-distributed crystals (40-60 nm) on the surface of titania nanofibres. The HY-TiO 2 as a catalyst had better hydrolyze cellulose to glucose than the HYnano did under identical conditions. The results of characterized determined that the better hydrolysis performance of cellulose may due to the HY-TiO 2 catalyst does not aggregate and is more likely to dissolve and diffuse, thus enhancing the accessibility of the active site of the catalyst and the reactants.

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Section: Conversion (%) =supporting

confidence: 86%

Aqueous-Phase Cellulose Hydrolysis over Zeolite HY Nanocrystals Grafted on Anatase Titania Nanofibers

et al. 2020

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“…TiO 2 is a low-cost and reducible metal oxide, which has been widely applied in catalytic reactions due to its strong interaction with metals. [20][21][22][23][24] By varying the reduction conditions to regulate the TiO x overlayer on Ru nanocatalysts, Zhang 25 et al found that an optimized TiO x overlayer formed on the Ru NPs during reduction at 450 °C, and showed excellent performance in Fischer-Tropsch synthesis. Li 26 et al synthesized Ru/TiO 2 catalysts through a dopamine sacrificial coating strategy.…”

Section: Introductionmentioning

confidence: 99%

Engineering the geometric and electronic structure of Ru via Ru–TiO₂ interaction for enhanced selective hydrogenation

Wang

Zhou

Zhao

et al. 2022

Catal. Sci. Technol.

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“…Dehydration of cyclohexanol, dehydrochlorination of halogenated cyclohexane, and Birch reduction methods were traditionally applied for the production of cyclohexene. However, high cost of crude material, side products, and environmental issues are generally addressed, limiting the industrialization of cyclohexene production [ 2 ]. In comparison, because of safety, energy conservation, environmental friendliness, and high carbon atom economy, great attention is drawn to the production of cyclohexene via partial hydrogenation of benzene, of which the reaction mechanism is given in Scheme 1 .…”

Section: Introductionmentioning

confidence: 99%

Effect of ZnSO4, MnSO4 and FeSO4 on the Partial Hydrogenation of Benzene over Nano Ru-Based Catalysts

Sun

Fan

Sun

et al. 2021

IJMS

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Nano Ru-based catalysts, including monometallic Ru and Ru-Zn nanoparticles, were synthesized via a precipitation method. The prepared catalysts were evaluated on partial hydrogenation of benzene towards cyclohexene generation, during which the effect of reaction modifiers, i.e., ZnSO4, MnSO4, and FeSO4, was investigated. The fresh and the spent catalysts were thoroughly characterized by XRD, TEM, SEM, XPS, XRF, and DFT studies. It was found that Zn2+ or Fe2+ could be adsorbed on the surface of a monometallic Ru catalyst, where a stabilized complex could be formed between the cations and the cyclohexene. This led to an enhancement of catalytic selectivity towards cyclohexene. Furthermore, electron transfer was observed from Zn2+ or Fe2+ to Ru, hindering the catalytic activity towards benzene hydrogenation. In comparison, very few Mn2+ cations were adsorbed on the Ru surface, for which no cyclohexene could be detected. On the other hand, for Ru-Zn catalyst, Zn existed as rodlike ZnO. The added ZnSO4 and FeSO4 could react with ZnO to generate (Zn(OH)2)5(ZnSO4)(H2O) and basic Fe sulfate, respectively. This further benefited the adsorption of Zn2+ or Fe2+, leading to the decrease of catalytic activity towards benzene conversion and the increase of selectivity towards cyclohexene synthesis. When 0.57 mol·L−1 of ZnSO4 was applied, the highest cyclohexene yield of 62.6% was achieved. When MnSO4 was used as a reaction modifier, H2SO4 could be generated in the slurry via its hydrolysis, which reacted with ZnO to form ZnSO4. The selectivity towards cyclohexene formation was then improved by the adsorbed Zn2+.

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Nanoparticulate Ru on TiO2 exposed the {1 0 0} facets: Support facet effect on selective hydrogenation of benzene to cyclohexene

Cited by 32 publications

References 47 publications

Aqueous-Phase Cellulose Hydrolysis over Zeolite HY Nanocrystals Grafted on Anatase Titania Nanofibers

Aqueous-Phase Cellulose Hydrolysis over Zeolite HY Nanocrystals Grafted on Anatase Titania Nanofibers

Engineering the geometric and electronic structure of Ru via Ru–TiO₂ interaction for enhanced selective hydrogenation

Effect of ZnSO4, MnSO4 and FeSO4 on the Partial Hydrogenation of Benzene over Nano Ru-Based Catalysts

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Nanoparticulate Ru on TiO2 exposed the {1 0 0} facets: Support facet effect on selective hydrogenation of benzene to cyclohexene

Cited by 32 publications

References 47 publications

Aqueous-Phase Cellulose Hydrolysis over Zeolite HY Nanocrystals Grafted on Anatase Titania Nanofibers

Aqueous-Phase Cellulose Hydrolysis over Zeolite HY Nanocrystals Grafted on Anatase Titania Nanofibers

Engineering the geometric and electronic structure of Ru via Ru–TiO2 interaction for enhanced selective hydrogenation

Effect of ZnSO4, MnSO4 and FeSO4 on the Partial Hydrogenation of Benzene over Nano Ru-Based Catalysts

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Nanoparticulate Ru on TiO2 exposed the {1 0 0} facets: Support facet effect on selective hydrogenation of benzene to cyclohexene

Engineering the geometric and electronic structure of Ru via Ru–TiO₂ interaction for enhanced selective hydrogenation