Zhiyuan Liu , Changan Wang , Ping Yang , Wei Wang , Hongyi Gao , Guoqing An , Siqi Liu , Juan Chen , Tingting Guo , Xinmeng Xu , Ge Wang
{"title":"利用 MOFs 内 Pd 纳米粒子的微环境和电子态调制提高二氯二苯并[DCPD]氢化的低温活性","authors":"Zhiyuan Liu , Changan Wang , Ping Yang , Wei Wang , Hongyi Gao , Guoqing An , Siqi Liu , Juan Chen , Tingting Guo , Xinmeng Xu , Ge Wang","doi":"10.1016/S1872-2067(24)60095-1","DOIUrl":null,"url":null,"abstract":"<div><p>Precise control of the local environment and electronic state of the guest is an important method of controlling catalytic activity and reaction pathways. In this paper, guest Pd NPs were introduced into a series of host UiO-67 MOFs with different functional ligands and metal nodes, the microenvironment and local electronic structure of Pd is modulated by introducing bipyridine groups and changing metal nodes (Ce<sub>6</sub>O<sub>6</sub> or Zr<sub>6</sub>O<sub>6</sub>). The bipyridine groups not only promoted the dispersion Pd NPs, but also facilitated electron transfer between Pd and UiO-67 MOFs through the formation of Pd-N bridges. Compared with Zr<sub>6</sub> clusters, the tunability and orbital hybridisation of the 4<em>f</em> electronic structure in the Ce<sub>6</sub> clusters modulate the electronic structure of Pd through the construction of the Ce-O-Pd interfaces. The optimal catalyst Pd/UiO-67(Ce)-bpy presented excellent low-temperature activity towards dicyclopentadiene hydrogenation with a conversion of > 99% and a selectivity of > 99% (50 °C, 10 bar). The results show that the synergy of Ce-O-Pd and Pd-N promotes the formation of active Pd<sup><em>δ</em>+</sup>, which not only enhances the adsorption of H<sub>2</sub> and electron-rich C=C bonds, but also contributes to the reduction of proton migration distance and improves proton utilization efficiency. These results provide valuable insights for investigating the regulatory role of the host MOFs, the nature of host-guest interactions, and their correlation with catalytic performance.</p></div>","PeriodicalId":9832,"journal":{"name":"Chinese Journal of Catalysis","volume":"64 ","pages":"Pages 112-122"},"PeriodicalIF":15.7000,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Microenvironment and electronic state modulation of Pd nanoparticles within MOFs for enhancing low-temperature activity towards DCPD hydrogenation\",\"authors\":\"Zhiyuan Liu , Changan Wang , Ping Yang , Wei Wang , Hongyi Gao , Guoqing An , Siqi Liu , Juan Chen , Tingting Guo , Xinmeng Xu , Ge Wang\",\"doi\":\"10.1016/S1872-2067(24)60095-1\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Precise control of the local environment and electronic state of the guest is an important method of controlling catalytic activity and reaction pathways. In this paper, guest Pd NPs were introduced into a series of host UiO-67 MOFs with different functional ligands and metal nodes, the microenvironment and local electronic structure of Pd is modulated by introducing bipyridine groups and changing metal nodes (Ce<sub>6</sub>O<sub>6</sub> or Zr<sub>6</sub>O<sub>6</sub>). The bipyridine groups not only promoted the dispersion Pd NPs, but also facilitated electron transfer between Pd and UiO-67 MOFs through the formation of Pd-N bridges. Compared with Zr<sub>6</sub> clusters, the tunability and orbital hybridisation of the 4<em>f</em> electronic structure in the Ce<sub>6</sub> clusters modulate the electronic structure of Pd through the construction of the Ce-O-Pd interfaces. The optimal catalyst Pd/UiO-67(Ce)-bpy presented excellent low-temperature activity towards dicyclopentadiene hydrogenation with a conversion of > 99% and a selectivity of > 99% (50 °C, 10 bar). The results show that the synergy of Ce-O-Pd and Pd-N promotes the formation of active Pd<sup><em>δ</em>+</sup>, which not only enhances the adsorption of H<sub>2</sub> and electron-rich C=C bonds, but also contributes to the reduction of proton migration distance and improves proton utilization efficiency. These results provide valuable insights for investigating the regulatory role of the host MOFs, the nature of host-guest interactions, and their correlation with catalytic performance.</p></div>\",\"PeriodicalId\":9832,\"journal\":{\"name\":\"Chinese Journal of Catalysis\",\"volume\":\"64 \",\"pages\":\"Pages 112-122\"},\"PeriodicalIF\":15.7000,\"publicationDate\":\"2024-09-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Chinese Journal of Catalysis\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1872206724600951\",\"RegionNum\":1,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, APPLIED\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chinese Journal of Catalysis","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1872206724600951","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, APPLIED","Score":null,"Total":0}
Microenvironment and electronic state modulation of Pd nanoparticles within MOFs for enhancing low-temperature activity towards DCPD hydrogenation
Precise control of the local environment and electronic state of the guest is an important method of controlling catalytic activity and reaction pathways. In this paper, guest Pd NPs were introduced into a series of host UiO-67 MOFs with different functional ligands and metal nodes, the microenvironment and local electronic structure of Pd is modulated by introducing bipyridine groups and changing metal nodes (Ce6O6 or Zr6O6). The bipyridine groups not only promoted the dispersion Pd NPs, but also facilitated electron transfer between Pd and UiO-67 MOFs through the formation of Pd-N bridges. Compared with Zr6 clusters, the tunability and orbital hybridisation of the 4f electronic structure in the Ce6 clusters modulate the electronic structure of Pd through the construction of the Ce-O-Pd interfaces. The optimal catalyst Pd/UiO-67(Ce)-bpy presented excellent low-temperature activity towards dicyclopentadiene hydrogenation with a conversion of > 99% and a selectivity of > 99% (50 °C, 10 bar). The results show that the synergy of Ce-O-Pd and Pd-N promotes the formation of active Pdδ+, which not only enhances the adsorption of H2 and electron-rich C=C bonds, but also contributes to the reduction of proton migration distance and improves proton utilization efficiency. These results provide valuable insights for investigating the regulatory role of the host MOFs, the nature of host-guest interactions, and their correlation with catalytic performance.
期刊介绍:
The journal covers a broad scope, encompassing new trends in catalysis for applications in energy production, environmental protection, and the preparation of materials, petroleum chemicals, and fine chemicals. It explores the scientific foundation for preparing and activating catalysts of commercial interest, emphasizing representative models.The focus includes spectroscopic methods for structural characterization, especially in situ techniques, as well as new theoretical methods with practical impact in catalysis and catalytic reactions.The journal delves into the relationship between homogeneous and heterogeneous catalysis and includes theoretical studies on the structure and reactivity of catalysts.Additionally, contributions on photocatalysis, biocatalysis, surface science, and catalysis-related chemical kinetics are welcomed.