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  1. Article ; Online: Promoting Catalytic Performance Involving Hydrogen Spillover by Ion Exchange of Pt@A Catalysts to Regulate Reactant Adsorption.

    Li, Tianhao / Yang, Jing / Tan, Yaozong / Yue, Yaning / Sun, Zongyu / Han, Mengxi / Peng, Pai / Chen, Qiang

    Inorganic chemistry

    2024  Volume 63, Issue 11, Page(s) 5120–5131

    Abstract: 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 ... ...

    Abstract 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 1-phenylethanol 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
    Language English
    Publishing date 2024-03-08
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1484438-2
    ISSN 1520-510X ; 0020-1669
    ISSN (online) 1520-510X
    ISSN 0020-1669
    DOI 10.1021/acs.inorgchem.4c00051
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Zeolite Encapsulation of Indole as an Antibacterial with Controllable Release Property.

    Li, Tingting / Ho, Chengen / Han, Mengxi / Peng, Pai / Chen, Junjie / Huang, Yong / Li, Bin / Chen, Qiang

    Langmuir : the ACS journal of surfaces and colloids

    2023  Volume 39, Issue 29, Page(s) 10122–10132

    Abstract: Effective regulation of the release behavior of bactericides to avoid both too fast release and too slow release to maximize their antibacterial ability is still the face of a grand challenge. In this study, indole as a bactericide was encapsulated into ... ...

    Abstract Effective regulation of the release behavior of bactericides to avoid both too fast release and too slow release to maximize their antibacterial ability is still the face of a grand challenge. In this study, indole as a bactericide was encapsulated into three types of zeolites (denoted as indole@zeolite), including the ZSM-22 zeolite, ZSM-12 zeolite, and beta zeolite with different topologies, respectively, to obtain indole@ZSM-22, indole@ZSM-12, and indole@Beta complexes finally. Benefiting from the confinement effect of zeolites, the release rate of indole from these three zeolite encapsulation systems showed a much slower release rate than that of indole impregnated onto a counterpart zeolite (denoted as indole/zeolite), thus avoiding the too-fast and too-slow release very well. As determined by molecular dynamics simulation combined with experimental results, attributed to the unequal diffusion coefficient in these three encapsulation systems caused by different zeolite topologies, the release rate of indole within these three complexes was different from each other, hence providing an effective way to avoid a too-slow release rate through choosing different zeolite topologies. The simulation results showed that the timescale of hopping of indoles in zeolites plays an important role in the dynamics in zeolites. Taking killing
    MeSH term(s) Zeolites ; Anti-Bacterial Agents ; Indoles ; Molecular Dynamics Simulation
    Chemical Substances Zeolites (1318-02-1) ; indole (8724FJW4M5) ; Anti-Bacterial Agents ; Indoles
    Language English
    Publishing date 2023-07-10
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2005937-1
    ISSN 1520-5827 ; 0743-7463
    ISSN (online) 1520-5827
    ISSN 0743-7463
    DOI 10.1021/acs.langmuir.3c01063
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Template-Guided Regioselective Encaging of Platinum Single Atoms into Y Zeolite: Enhanced Selectivity in Semihydrogenation and Resistance to Poisoning.

    Chen, Qiang / Peng, Pai / Yang, Ganjun / Li, Yanzhi / Han, Mengxi / Tan, Yaozong / Zhang, Chengxi / Chen, Junwen / Jiang, Kun / Liu, Lei / Ye, Chenliang / Xing, Enhui

    Angewandte Chemie (International ed. in English)

    2022  Volume 61, Issue 35, Page(s) e202205978

    Abstract: It is challenging to establish single metal atoms with a uniform coordination environment at targeted sites of a zeolite. In this study, single platinum atoms were selectively encaged in the six-membered rings of sodalite (SOD) cages within Y zeolite ... ...

    Abstract It is challenging to establish single metal atoms with a uniform coordination environment at targeted sites of a zeolite. In this study, single platinum atoms were selectively encaged in the six-membered rings of sodalite (SOD) cages within Y zeolite using a template-guiding strategy. During the in situ synthesis process, template molecules were designed to occupy supercages and thereby force coordinated platinum species into SOD cages. Subsequent control of the post-treatment conditions yielded the Y zeolite with selectively encaged single platinum atoms, denoted Pt@Y-SOD. The Pt@Y-SOD catalyst had good stability and excellent catalytic selectivity in the semihydrogenation reaction, and it exhibited interesting thiophene and carbon monoxide resistance in this transformation because interactions with these poisons are weakened by the configuration of the encaged single platinum atoms.
    Language English
    Publishing date 2022-07-19
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2011836-3
    ISSN 1521-3773 ; 1433-7851
    ISSN (online) 1521-3773
    ISSN 1433-7851
    DOI 10.1002/anie.202205978
    Database MEDical Literature Analysis and Retrieval System OnLINE

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