Tailoring the activity and selectivity of Rh/SiO2 for the selective hydrogenation of phenol by CoOx promotion

Zhang, Fei; Wu, Chunzheng; Wang, Shuibo; Wang, Shiwei; Li, Tong; Zou, Laixi; Yu, Hongbo; Yin, Hongfeng

doi:10.1039/d1cy02324a

Catal. Sci. Technol.

2022

DOI: 10.1039/d1cy02324a

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Tailoring the activity and selectivity of Rh/SiO₂ for the selective hydrogenation of phenol by CoO_x promotion

Fei Zhang

Chunzheng Wu

Shuibo Wang

et al.

Abstract: Although supported Rh nanoparticles (NPs) are one of the best catalysts for the selectivity hydrogenation of phenol to cyclohexanol, they still suffer from poor selectivity problems. In this study, we...

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Cited by 8 publications

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“…Various heterogeneous catalysts, such as Ru, 17,41,42 Pd, 43,44 and Rh, 45 have been successfully developed for the hydrogenation of phenols to cyclohexanols. Despite these advancements, their practical applications still face challenges including poor selectivity, low yields and limited substrate scopes.…”

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Selective hydrogenation of phenols to cyclohexanols catalyzed by robust solid NHC–Rh coordination assemblies in water

Chen,

Ji,

2023

Green Chem.

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confidence: 99%

Selective hydrogenation of phenols to cyclohexanols catalyzed by robust solid NHC–Rh coordination assemblies in water

Chen,

Ji,

2023

Green Chem.

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Synergy of Rh Nanoparticles With Fe₃O₄ for Efficient Selective Catalytic Transfer Hydrogenation of Nitrostyrenes Using Stoichiometric Hydrazine Hydrate

Hu,

Guo,

Zhang

et al. 2024

Applied Organom Chemis

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Hydrazine hydrate as a hydrogen source has a good effect on nitro reduction, but overuse has environmental toxicity and is prone to over‐hydrogenation, resulting in low selectivity. Herein, we report a magnetically separable Rh/Fe3O4 (1.26 wt%) catalyst containing an optimal Rh content that can completely convert 3‐nitrostyrene to 3‐vinylaniline (> 99% selectivity) using a stoichiometric molar ratio of hydrazine hydrate (‐NO2:N2H4·H2O = 1:1.5). This is due to the synergy between Rh and Fe3O4 and the natural selectivity of N2H4·H2O for nitro. The synergy can reduce the activation energy of the reaction (36.6 kJ/mol), increasing the reduction rate of nitro group and avoiding the combination of active hydrogen species (H*) to H2 as well as the hydrogenation of N2H4 to NH3. Moreover, the active H* produced by N2H4·H2O is different from that produced by H2, and excess dose of N2H4 will inevitably yield H2 thus decline the selectivity.

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Tuning the catalytic performance of Pt/SiO2 catalysts by CoOx modification for selective hydrogenations of unsaturated carbonyl compounds

Wang

et al. 2022

Applied Surface Science

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Tailoring the activity and selectivity of Rh/SiO₂ for the selective hydrogenation of phenol by CoO_x promotion

Abstract: Although supported Rh nanoparticles (NPs) are one of the best catalysts for the selectivity hydrogenation of phenol to cyclohexanol, they still suffer from poor selectivity problems. In this study, we...

Cited by 8 publications

References 52 publications

Selective hydrogenation of phenols to cyclohexanols catalyzed by robust solid NHC–Rh coordination assemblies in water

Selective hydrogenation of phenols to cyclohexanols catalyzed by robust solid NHC–Rh coordination assemblies in water

Synergy of Rh Nanoparticles With Fe₃O₄ for Efficient Selective Catalytic Transfer Hydrogenation of Nitrostyrenes Using Stoichiometric Hydrazine Hydrate

Tuning the catalytic performance of Pt/SiO2 catalysts by CoOx modification for selective hydrogenations of unsaturated carbonyl compounds

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Tailoring the activity and selectivity of Rh/SiO2 for the selective hydrogenation of phenol by CoOx promotion

Abstract: Although supported Rh nanoparticles (NPs) are one of the best catalysts for the selectivity hydrogenation of phenol to cyclohexanol, they still suffer from poor selectivity problems. In this study, we...

Cited by 8 publications

References 52 publications

Selective hydrogenation of phenols to cyclohexanols catalyzed by robust solid NHC–Rh coordination assemblies in water

Selective hydrogenation of phenols to cyclohexanols catalyzed by robust solid NHC–Rh coordination assemblies in water

Synergy of Rh Nanoparticles With Fe3O4 for Efficient Selective Catalytic Transfer Hydrogenation of Nitrostyrenes Using Stoichiometric Hydrazine Hydrate

Tuning the catalytic performance of Pt/SiO2 catalysts by CoOx modification for selective hydrogenations of unsaturated carbonyl compounds

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Product

Resources

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Tailoring the activity and selectivity of Rh/SiO₂ for the selective hydrogenation of phenol by CoO_x promotion

Synergy of Rh Nanoparticles With Fe₃O₄ for Efficient Selective Catalytic Transfer Hydrogenation of Nitrostyrenes Using Stoichiometric Hydrazine Hydrate