Selective hydrogenation of benzene over Ru supported on surface modified TiO2

Hao, Fang; Zheng, Jingsong; Ouyang, Donghong; Xiong, Wei; Liu, Pingle; Luo, He’an

doi:10.1007/s11814-020-0689-9

Cited by 5 publications

(3 citation statements)

References 67 publications

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“…The Ru/TNSTs-4 catalyst exhibits a suitable anatase/rutile ratio, where the electron-deficient Ru δ+ formed at the anatase/rutile junction can reduce the adsorption strength of cyclohexene and enhance the rapid desorption of cyclohexene [25,43], leading to a marked enhancement in the catalyst's selectivity. Consequently, an optimal initial selectivity of 95% coupled with a peak cyclohexene yield of 51% was realized for the Ru/TNSTs-4 catalysts, superior to most of the TiO 2 -supported Ru catalysts reported to date (Table S3) [8,[21][22][23][25][26][27][43][44][45][46][47][48][49][50][51]. This suggests that Ru/TNSTs-4 can be used as an efficient catalyst for the selective hydrogenation of benzene.…”

Section: Resultsmentioning

confidence: 82%

“…Both exhibit a significant linear relationship, affirming that the hydrogenation of benzene to cyclohexene aligns with the first-order reaction kinetics under these reaction conditions. Concurrently, the hydrogenation of cyclohexene to cyclohexane obeys zero-order reaction kinetics [44,45]. The origin of selectivity was further probed by determining the rate constants k1 and k2 for both steps of benzene hydrogenation as well as cyclohexene hydrogenation.…”

Section: Resultsmentioning

confidence: 99%

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Ru-Loaded Biphasic TiO2 Nanosheet-Tubes Enriched with Ti3+ Defects and Directionally Deficient Electrons as Highly Efficient Catalysts in Benzene Selective Hydrogenation

Wang,

Chen,

Xiong

et al. 2023

Catalysts

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Crystalline phase engineering is a prominent strategy for synergistically optimizing the surface–body phases of a catalyst. In this work, TiO2 nanosheets assembled into nanotubes (TNSTs) with two phases, anatase and rutile, were firstly synthesized via crystal engineering by simple thermal annealing. These were subsequently loaded with Ru nanoparticles, with a mean size of 5.0 nm, to create the efficient benzene hydrogenation catalyst Ru/TNSTs. The well-designed nanosheet-tube structure boasts a large specific surface area and excellent transmission channels, which effectively prevents the agglomeration and deactivation of loaded Ru nanoparticles, as well as promoting the internal diffusion in the reaction process of benzene hydrogenation to cyclohexene. Furthermore, titanium dioxide nanosheet-tubes contain numerous Ti3+ defects, which not only improves the overall conversion rate of cyclohexene but also enhances the suppression of cyclohexene adsorption. Most importantly, the titanium dioxide with its two-phase composition of 75 wt% anatase and 25 wt% rutile increases the ratio of electron deficiencies of Ru and promotes cyclohexene desorption. These synergistic properties enhance the selectivity and efficiency of the Ru/TNSTs catalysts, resulting in excellent performance in the hydrogenation of benzene to cyclohexene. In particular, the Ru/TNSTs-4 catalyst (annealed for 4 h), under the specific conditions of 140 °C temperature and 5 MPa hydrogen pressure for the hydrogenation process, achieves a 95% initial selectivity and 51% yield of cyclohexene in the reaction, outperforming most supported Ru-based catalysts. This work may provide new perspectives for designing efficient benzene hydrogenation catalysts via crystalline phase engineering.

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Section: Resultsmentioning

confidence: 82%

Section: Resultsmentioning

confidence: 99%

Ru-Loaded Biphasic TiO2 Nanosheet-Tubes Enriched with Ti3+ Defects and Directionally Deficient Electrons as Highly Efficient Catalysts in Benzene Selective Hydrogenation

Wang,

Chen,

Xiong

et al. 2023

Catalysts

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“…A higher oxygen content in Ru/TiO 2 compared to Pt/TiO 2 was observed. This can be explained by the formation of oxide compounds of ruthenium during reduction reactions. , In addition, 1.8 and 0.7 wt % metallic Pt and Ru, respectively, were detected on the TiO 2 structure in EDS analysis. The fact that these weight percentages are low is important in terms of reducing the use of expensive noble metals.…”

Section: Resultsmentioning

confidence: 98%

Ruthenium and Platinum-Modified Titanium Dioxide Support for NaBH₄ Hydrolysis

Altaf,

Minkina,

Shabunya

et al. 2023

ACS Omega

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Highly stable platinum (Pt) and ruthenium (Ru)-based catalysts on titanium oxide (TiO 2 ) nanoparticle support were prepared. The productivity of hydrogen generation from sodium borohydride (NaBH 4 ) hydrolysis was observed to be as high as 95%. The activation energies for the hydrolysis reaction in the presence of Ru/TiO 2 in aqueous and alkaline solutions were 62.00 and 64.65 kJ mol −1 , respectively. On the other hand, the activation energy value of the hydrolysis reaction with the Pt/TiO 2 catalyst decreased from 60.5 to 53.2 kJ mol −1 , and the solution was changed from an aqueous to an alkaline medium. The experimental results have indicated that NaOH concentration (ranging from 0.5 to 2 M) affected the hydrogen generation rate (HGR) differently for both metals on the TiO 2 support. Consequently, the HGR of the hydrolysis reaction in the presence of the Ru/TiO 2 catalyst decreased with increasing NaOH concentration, whereas the Pt/TiO 2 catalyst efficiency increased with increasing NaOH concentration.

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Synthesis of fluorescent dye-embedded silica nanoparticles for vitamin D3 detection using sandwich-like assay

Lee

Kim²,

Lee³

et al. 2022

Korean J. Chem. Eng.

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Selective hydrogenation of benzene over Ru supported on surface modified TiO2

Cited by 5 publications

References 67 publications

Ru-Loaded Biphasic TiO2 Nanosheet-Tubes Enriched with Ti3+ Defects and Directionally Deficient Electrons as Highly Efficient Catalysts in Benzene Selective Hydrogenation

Ru-Loaded Biphasic TiO2 Nanosheet-Tubes Enriched with Ti3+ Defects and Directionally Deficient Electrons as Highly Efficient Catalysts in Benzene Selective Hydrogenation

Ruthenium and Platinum-Modified Titanium Dioxide Support for NaBH₄ Hydrolysis

Synthesis of fluorescent dye-embedded silica nanoparticles for vitamin D3 detection using sandwich-like assay

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Selective hydrogenation of benzene over Ru supported on surface modified TiO2

Cited by 5 publications

References 67 publications

Ru-Loaded Biphasic TiO2 Nanosheet-Tubes Enriched with Ti3+ Defects and Directionally Deficient Electrons as Highly Efficient Catalysts in Benzene Selective Hydrogenation

Ru-Loaded Biphasic TiO2 Nanosheet-Tubes Enriched with Ti3+ Defects and Directionally Deficient Electrons as Highly Efficient Catalysts in Benzene Selective Hydrogenation

Ruthenium and Platinum-Modified Titanium Dioxide Support for NaBH4 Hydrolysis

Synthesis of fluorescent dye-embedded silica nanoparticles for vitamin D3 detection using sandwich-like assay

Contact Info

Product

Resources

About

Ruthenium and Platinum-Modified Titanium Dioxide Support for NaBH₄ Hydrolysis