Palladium supported on carbon nanotube modified nickel foam as a structured catalyst for polystyrene hydrogenation

Mao, Feng; Luo, Zhifeng; Rong-qi, Chen; Yi, Shan; Lu, Hui; Cao, Gaoping; Li, Chong; Feng, Shao-Yue; Li, Chen-Yang

doi:10.1016/j.apcata.2018.12.002

Cited by 16 publications

(19 citation statements)

References 53 publications

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“…Moreover, the external surface calculated by the t-lot was up to 220 m 2 /g. It is noteworthy that the external surface area represents an effective surface area that large molecular reactants could access efficiently, excluding the pore diffusion limitation . Moreover, the loading amount of Ni in the Ni-CQDs/NCNs-400 (about 53.1%) was calculated by TG curves (Figure c).…”

Section: Resultsmentioning

confidence: 99%

Rationally Constructing A Nano MOF-Derived Ni and CQD Embedded N-Doped Carbon Nanosphere for the Hydrogenation of Petroleum Resin at Low Temperature

Chen

Tang

et al. 2021

ACS Appl. Mater. Interfaces

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A key issue in attaining highly efficient supported catalysts for the hydrogenation of unsaturated polymers arises from the entanglement between the number of exposed active sites and the severe internal mass transfer limitation caused by their large molecular size. Hence, an ultrasmall N-doped carbon nanosphere with Ni NPs and CQDs embedded (Ni-CQDs/NCNs) was reasonably constructed by low-temperature (400 °C) pyrolysis of the precursor CQDs@Nano-Ni-ZIFs. As-prepared Ni-CQDs/NCNs exhibited superior catalytic activity to a commercial 10% Pd/C catalyst in petroleum resin hydrogenation under a low temperature of 150 °C, which is 100 and 60 °C lower than that of previously reported Ni- and Pd-based catalysts, respectively. The excellent catalytic activity of Ni-CQDs/NCNs mainly contributes to the following factors: first, its ultrasmall structure (ca. 50 nm) eliminates the internal mass transfer limitation; second, the CQDs and N-doped carbon matrix stabilize the 53.1 wt % high-loading Ni NPs at a small size of 5.6 nm, providing abundant active sites; and third, the electronic regulation of N-doped carbon enhances the intrinsic activity of Ni, which was revealed by the experiments and DFT calculations. Besides, Ni-CQDs/NCNs exhibits long-term stability and appreciable magnetic separation performance, making it a considerable candidate for industrial application. This work not only offers a facile approach to prepare nano MOF-derived catalysts but also gives helpful instruction to the rational design of heterogeneous catalysts for the reaction involving large molecules.

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Section: Resultsmentioning

confidence: 99%

Rationally Constructing A Nano MOF-Derived Ni and CQD Embedded N-Doped Carbon Nanosphere for the Hydrogenation of Petroleum Resin at Low Temperature

Chen

Tang

et al. 2021

ACS Appl. Mater. Interfaces

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“…The improved performance suggesting the enhanced liquid-solid mass transfer in the rotating foam stirrer reactor with the merits of eliminating the filtration operation [10]. While the entangled carbon nanotubes layer with open pores and the dense carbon layer beneath covered around the skeleton of nickel foam, the palladium catalyst supported on carbon nanotube modified nickel foam establish a hybrid hierarchical structure with large effective surface area and promoted the internal diffusion of large polystyrene coils [11]. The average diameter and graphitization degree of carbon nanotubes could be tuned by adjusting the chemical vapor deposition temperature and its surface area and interaction with polystyrene molecules.…”

Section: Carbon Nanotubes Supported Palladium Catalystmentioning

confidence: 99%

New advances in catalysts for polystyrene hydrogenation

et al. 2020

E3S Web Conf.

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“…Herein, a lot of effort has been made to overcome those problems. , Loading TS-1 to suitable support is a novel and facile method to prepare the monolithic TS-1. , The surface chemical properties and interaction between support and gels play a significant role in in situ crystallization . It has been reported that carbon nanotubes immobilized on nickel foam (CNT/NF) have been successfully applied to load TS-1 particles. − The monolithic TS-1 is usually synthesized by the traditional hydrothermal method; however, this method produces the associated powder at the bottom of the crystallization autoclave, resulting in wastage of gels and templates. − In addition, solvents occupied a lot of space in the autoclaves, greatly reducing the product yield. − Therefore, it is very important to develop an effective and green strategy to synthesize monolithic TS-1. − …”

Section: Introductionmentioning

confidence: 99%

Steam-Assisted in Situ Prepared TS-1 with Hierarchical Pores and Tunable Acid Sites Grown on Carbon Nanotubes Decorated Nickel Foam

Zhang

Cao

Cai

et al. 2020

Ind. Eng. Chem. Res.

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The TS-1 particles grown on carbon nanotubes decorated nickel foam (denoted as MTS-1S) are successfully synthesized by a steam-assisted crystallization method that does not waste the gels and is more convenient, economical, and efficient than the traditional hydrothermal method. MTS-1S possesses a hierarchical porous structure of micropores, mesopores, and macropores and a high content of titanium in the skeleton, which is beneficial for the diffusion of reactants and products and exhibits excellent catalytic performance for the epoxidation of propylene. The impact of water on the formation of acid sites has been demonstrated by density functional theory (DFT). The acid sites of MTS-1S can be tuned by controlling the amount of water at the bottom of autoclave during steam-assisted crystallization, which significantly increases the selectivity to propylene oxide. Finally, the impact of acid sites of Si–OH and Ti–OH groups (Ti located in a defect structure, adjacent to Si–OH) on the byreaction of epoxidation of propylene is confirmed by simulation.

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Palladium supported on carbon nanotube modified nickel foam as a structured catalyst for polystyrene hydrogenation

Cited by 16 publications

References 53 publications

Rationally Constructing A Nano MOF-Derived Ni and CQD Embedded N-Doped Carbon Nanosphere for the Hydrogenation of Petroleum Resin at Low Temperature

Rationally Constructing A Nano MOF-Derived Ni and CQD Embedded N-Doped Carbon Nanosphere for the Hydrogenation of Petroleum Resin at Low Temperature

New advances in catalysts for polystyrene hydrogenation

Steam-Assisted in Situ Prepared TS-1 with Hierarchical Pores and Tunable Acid Sites Grown on Carbon Nanotubes Decorated Nickel Foam

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