Rh nanoclusters encaged in hollow mesoporous silica nanoreactors with enhanced catalytic performance for phenol selective hydrogenation

Yan, Peijian; Tian, Pengfei; Li, Kaijie; Stuart, Martien A. Cohen; Wang, Junyou; Yu, Xinhai; Zhou, Shenghu

doi:10.1016/j.cej.2020.125484

Cited by 49 publications

(36 citation statements)

References 53 publications

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“…Metal nanoparticles (MNPs) exhibit a higher excellent catalytic efficiency than bulk materials as a result of a large number of catalytic sites per unit area and higher surface-to-volume ratios. The size, morphology, and interaction with the substrate material are three key factors dominating the catalytic performance of MNPs. − However, MNPs, especially those with a critical size of 1–2 nm or smaller, tend to lose their catalytic activity during the reaction because of aggregation into larger clusters. To cope with this problem, various methods have been developed to encapsulate or disperse MNPs in heterogeneous or homogeneous systems by the usage of porous materials such as traditional zeolites, , ionic liquid vesicles, metal–organic frameworks (MOFs), − covalent–organic frameworks (COFs), porous coordination polymers, organic coordination cages, − and so on.…”

Section: Introductionmentioning

confidence: 99%

Ultrafine Palladium Nanoparticles Stabilized in the Porous Liquid of Covalent Organic Cages for Photocatalytic Hydrogen Evolution

Zhang

Wei

et al. 2020

ACS Appl. Energy Mater.

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Soluble covalent organic cages (COCs) were designed to comprise cryptand inner cavities and multiple metal-chelating sites on windows. The porous liquid formed by well-dispersed COCs in solution proves to be an excellent stabilizer for ultrafine palladium nanoparticles with a critical size of 1–3 nm using NaBH4 or methanol as a reductant. When transferring palladium nanoparticles stabilized in the porous liquid of COCs onto carbon nitride (g-C3N4), an efficient heterogeneous photocatalyst could be obtained to possess high catalytic activity for hydrogen evolution from water with long-term durability. This provides prospects for the application of porous liquids in various fields by combining advantages of homogeneous and heterogeneous attributes together.

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Section: Introductionmentioning

confidence: 99%

Ultrafine Palladium Nanoparticles Stabilized in the Porous Liquid of Covalent Organic Cages for Photocatalytic Hydrogen Evolution

Zhang

Wei

et al. 2020

ACS Appl. Energy Mater.

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“…The synthesis procedures were modified from our previously reported work. , For the synthesis of Pt 1 Sn 0.3 @HMSNs, 1440 μL of 0.087 mM positively charged P2MVP 128 - b -PEO 477 aqueous solution, 1200 μL of 5.0 mM L 3 aqueous solution, 720 μL of 5.0 mM K 2 PtCl 4 aqueous solution, 216 μL of 5.0 mM SnCl 4 · 5H 2 O aqueous solution, and 36.42 mL of deionized water were mixed in a 50 mL beaker and stirred with a magnetic stirring at 200 rpm. The desired pH values (4.10–4.20) were achieved by the addition of dilute nitric acid or sodium hydroxide aqueous solution.…”

Section: Methodsmentioning

confidence: 99%

Hollow Mesoporous Nanoreactors with Encaged PtSn Alloy Nanoparticles for Selective Hydrogenation of Furfural to Furfuryl Alcohol

Xiao

Yan

et al. 2021

Ind. Eng. Chem. Res.

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Hollow mesoporous nanoreactors with encaged functional nanoparticles are promising heterogeneous catalysts due to the advantages related to their hollow cavities. In this study, we employ metal ion-bound polymer micelles to synthesize PtSn alloy nanoparticle-encaged hollow mesoporous nanoreactors (PtSn@HMSNs), which contain ∼4 nm PtSn alloy NPs located in ∼13 nm hollow cavities and relatively large (∼9 nm) mesoporous channels in silica shells. Relative to monometallic Pt@HMSNs and supported Pt 1 Sn 0.3 /SiO 2 , Pt 1 Sn 0.3 @HMSNs exhibit greatly enhanced activity and selectivity for hydrogenation of furfural to furfuryl alcohol. At 1.0 MPa H 2 , 100 °C, and a furfural/Pt molar ratio of 1884:1, 97.5% of furfuryl alcohol yield was achieved in 5.0 h. The dramatically promoted catalytic performance of Pt 1 Sn 0.3 @HMSNs can be assigned to the confinement effect that the location of active NPs inside hollow cavities increases the collision rates between reactants and active NPs to promote catalytic activity, as well as the synergistic effect between Pt and Sn.

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“…Compared with the control silica supported Rh catalysts, the obtained Rh@HMSNs show significantly enhanced catalytic activity, cyclohexanol selectivity and stability for phenol hydrogenation. [13] In addition to metal particles as active species, the other major part of the catalysts usually includes the support. Therefore, the performance of the catalyst is also strongly related to the carrier, whose main role is to improve the physical and chemical properties of the metal particles.…”

Section: Introductionmentioning

confidence: 99%

Highly Selective Hydrogenation of Phenol Catalyzed by Porous BN Supported Ni−Pd Catalysts

Zhang

Fang

et al. 2021

ChemistrySelect

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Phenol, as a phenolic organic substance, is widely present in industrial wastewater and is an important organic pollutant. Porous boron nitride (p-BN) is an ideal material as catalyst support because it has a large specific surface area and a variety of pore structures. In this paper, a series of NiÀ Pd/p-BN catalysts were prepared by precipitation method. Meanwhile, the catalytic performance of the catalysts for the hydrogenation of phenol to cyclohexanol was systematical and comprehensive studied. Significantly, with the optimal catalyst, the conversion of phenol was greatly improved to reach more than 99.9 %, and the selectivity of cyclohexanol could almost exceed 99.8 %. In addition, the NiÀ Pd/p-BN catalyst can be reused as an effective catalyst for numerous cycles, indicating superior reusability and recyclability. After five cycles, the conversion of phenol and the selectivity of cyclohexanol is only reduced to ∼ 80 %. This catalyst will be a promising material in the field of industrial catalysis applications.

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Rh nanoclusters encaged in hollow mesoporous silica nanoreactors with enhanced catalytic performance for phenol selective hydrogenation

Cited by 49 publications

References 53 publications

Ultrafine Palladium Nanoparticles Stabilized in the Porous Liquid of Covalent Organic Cages for Photocatalytic Hydrogen Evolution

Ultrafine Palladium Nanoparticles Stabilized in the Porous Liquid of Covalent Organic Cages for Photocatalytic Hydrogen Evolution

Hollow Mesoporous Nanoreactors with Encaged PtSn Alloy Nanoparticles for Selective Hydrogenation of Furfural to Furfuryl Alcohol

Highly Selective Hydrogenation of Phenol Catalyzed by Porous BN Supported Ni−Pd Catalysts

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