Microenvironment engineering of supported metal nanoparticles for chemoselective hydrogenation

Wang, Maodi; Yang, Qihua

doi:10.1039/d2sc04223a

Cited by 15 publications

(7 citation statements)

References 135 publications

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“…As disclosed, metal@zeolite can adjust the catalytic selectivity by strengthening the adsorption energy of target reactants while weakening the interaction of intermediates and products. 16,17 For example, the synthesized SOD zeoliteencapsulated Pd nanoclusters showed an ethylene selectivity of more than 94.5% in catalytic hydrogenation of acetylene via hydrogen spillover, and as reported by authors, compared to a bare Pd surface which possesses strong interaction energy with ethylene leading to low selectivity, easy desorption of ethylene from the SOD zeolite surface played a key role in promoting such high selectivity. 16 T h i s c o n t e n t i s In addition to selectivity, in the process of zeolitic hydrogen spillover, the adsorption capacity of the substrate on the surface of zeolite also has a significant effect on the catalytic activity.…”

Section: Introductionsupporting

confidence: 56%

Promoting Catalytic Performance Involving Hydrogen Spillover by Ion Exchange of Pt@A Catalysts to Regulate Reactant Adsorption

Li,

Yang,

Tan

et al. 2024

Inorg. Chem.

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Zeolite-encapsulated metal nanoparticle systems have exhibited interesting catalytic performances via the hydrogen spillover process, yet how to further utilize the function of zeolite supports to promote catalytic properties in such a process is still challenging and has rarely been investigated. Herein, to address this issue, the strategy to strengthen the adsorption energy of reactant onto the zeolite surface via a simple ion exchange method has been implemented. Ion-exchanged linde type A (LTA) zeolite-encapsulated platinum nanoclusters (Pt@NaA, Pt@HA, Pt@KA, and Pt@CaA) were prepared to study the influence of ion exchange on the catalytic performance in the model reaction of hydrogenation of acetophenone to 1-phenylethanol. The reaction results showed that the Pt@CaA catalyst exhibited the best catalytic activity in the series of encapsulated catalysts, and the selectivity of 1phenylethanol approached 100%. As revealed by density functional theory (DFT) calculations and acetophenone temperature-programmed desorption (acetophenone-TPD) experiments, in comparison with introduced cations of Na + , H + , and K + , ion-exchanged Ca 2+ on the zeolite maximumly enhanced the adsorption of carbonyl groups in acetophenone, playing a critical role in achieving the highest activity and excellent catalytic selectivity among the Pt@A catalysts.

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Section: Introductionsupporting

confidence: 56%

Promoting Catalytic Performance Involving Hydrogen Spillover by Ion Exchange of Pt@A Catalysts to Regulate Reactant Adsorption

Li,

Yang,

Tan

et al. 2024

Inorg. Chem.

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“…In addition, the properties of the surrounding microenvironment might affect the photocatalytic performance of the as‐prepared CMP photocatalysts. [ 34 ] Herein, we have designed and synthesized four kinds of novel donor‐acceptor CMPs from PCZN‐2 to PCZN‐5 through nickel(0)‐catalyzed Yamamoto cross‐coupling using 3,6‐dibromo‐9‐(4‐bromophenyl)carbazole (CZ) as electron donor and 5,5'‐dibromo‐2,2'‐bipyridine (DBPy) as electron acceptor. As a comparison, PCZN‐1 and PCZN‐6 were obtained by Yamamoto homocoupling reaction of CZ and DBPy, respectively.…”

Section: Background and Originality Contentmentioning

confidence: 99%

Carbazole‐Based Donor‐Acceptor Conjugated Microporous Polymers for Efficient Visible‐Light‐Driven Photocatalytic H₂ Evolution^†

Yang

Cheng

et al. 2023

Chin. J. Chem.

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Comprehensive SummaryConjugated microporous polymers (CMPs) featuring extended π‐structures, large specific surface area and tailor‐made functionalities are a class of promising organic photocatalysts for hydrogen evolution reaction (HER) from water. However, the photocatalytic activities of most CMPs are severely hindered by slow charge transfer rate and fast charge recombination process. Herein, we develop a strategy for the synthesis of donor‐acceptor CMPs through nickel(0)‐catalyzed Yamamoto cross‐coupling of 3,6‐dibromo‐9‐(4‐bromophenyl)carbazole (CZ) with 5,5'‐dibromo‐2,2'‐bipyridine (DBPy) for efficient HER from water. The PCZN‐4 prepared with a 2 : 3 stoichiometric ratio of CZ to DBPy exhibited the highest photocatalytic hydrogen evolution rate of 7160 μmol·g–1·h–1, which was nearly equal to 179 times and 143 times that of PCZN‐1 (40 μmol·g–1·h–1) and PCZN‐6 (50 μmol·g–1·h–1) obtained by Yamamoto homocoupling of CZ and DBPy, respectively. Compared to the homocoupling counterparts, the enhanced photocatalytic activity of PCZN‐4 results from improved separation efficiency of charge carriers. Interestingly, the photocatalytic H2 evolution performance of PCZN‐4 could be further improved up to 17080 μmol·g–1·h–1 by adjusting pH of the aqueous solution. This work offers a novel approach for improving photocatalytic efficiency by tuning the chemical structures and surrounding microenvironment of the polymer backbone.

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“…It has been reported that microenvironment regulation would significantly affect the chemoselective hydrogenation performance. 52 Next, the research progress will be introduced from the following four aspects: active components, supports, specially structured catalysts and promoters.…”

Section: Emerging Thermal Catalysts For Eg Synthesismentioning

confidence: 99%

Emerging catalysts for the ambient synthesis of ethylene glycol from CO₂ and its derivatives

Huang

Chen

et al. 2023

Chem. Commun.

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Microenvironment engineering of supported metal nanoparticles for chemoselective hydrogenation

Abstract: Selective hydrogenation with supported metal catalysts widely used in the production of fine chemicals and pharmaceuticals often faces a trade-off between activity and selectivity, mainly due to the inability to...

Cited by 15 publications

References 135 publications

Promoting Catalytic Performance Involving Hydrogen Spillover by Ion Exchange of Pt@A Catalysts to Regulate Reactant Adsorption

Promoting Catalytic Performance Involving Hydrogen Spillover by Ion Exchange of Pt@A Catalysts to Regulate Reactant Adsorption

Carbazole‐Based Donor‐Acceptor Conjugated Microporous Polymers for Efficient Visible‐Light‐Driven Photocatalytic H₂ Evolution^†

Emerging catalysts for the ambient synthesis of ethylene glycol from CO₂ and its derivatives

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Microenvironment engineering of supported metal nanoparticles for chemoselective hydrogenation

Abstract: Selective hydrogenation with supported metal catalysts widely used in the production of fine chemicals and pharmaceuticals often faces a trade-off between activity and selectivity, mainly due to the inability to...

Cited by 15 publications

References 135 publications

Promoting Catalytic Performance Involving Hydrogen Spillover by Ion Exchange of Pt@A Catalysts to Regulate Reactant Adsorption

Promoting Catalytic Performance Involving Hydrogen Spillover by Ion Exchange of Pt@A Catalysts to Regulate Reactant Adsorption

Carbazole‐Based Donor‐Acceptor Conjugated Microporous Polymers for Efficient Visible‐Light‐Driven Photocatalytic H2 Evolution†

Emerging catalysts for the ambient synthesis of ethylene glycol from CO2 and its derivatives

Contact Info

Product

Resources

About

Carbazole‐Based Donor‐Acceptor Conjugated Microporous Polymers for Efficient Visible‐Light‐Driven Photocatalytic H₂ Evolution^†

Emerging catalysts for the ambient synthesis of ethylene glycol from CO₂ and its derivatives