{"title":"超临界co2辅助从金属有机框架中制备催化活性Pd/Ni纳米颗粒嵌入碳","authors":"Kiyoshi Matsuyama , Masashi Eiro , Ayano Shoji , Takafumi Kato","doi":"10.1016/j.supflu.2024.106500","DOIUrl":null,"url":null,"abstract":"<div><div>A metal nanoparticle (NP)-carbon composite derived from metal-organic frameworks (MOFs) has garnered significant attention for its high catalytic activity. This study develops a simple method for preparing Pd/Ni NP-embedded carbon from MOFs. Palladium(Ⅱ) acetate (Pd(OAc)<sub>2</sub>) is used as the precursor for Pd NPs and is loaded into the pores of Ni-MOF-74 using supercritical carbon dioxide (scCO₂) assisted immobilization. Pd/Ni NPs are prepared by reduction and pyrosis of Pd(OAc)<sub>2</sub>-loaded Ni-MOF-74. Scanning transmission electron microscopy (STEM) clearly reveals that the Pd/Ni NPs are successfully immobilized in the carbon (Pd/Ni@C) and dispersed with sizes around 10 nm. Pd/Ni@C demonstrates high catalytic activity and high durability in Suzuki–Miyaura coupling reactions, despite having lower Pd content (4.7 wt%) than commercially available Pd@C (10 wt%). The active palladium species Pd(0) on Pd/Ni@C accelerated the Suzuki-Miyaura coupling reactions, because the Ni in Pd/Ni NPs played the sacrificial role to resist Pd-oxidation.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"218 ","pages":"Article 106500"},"PeriodicalIF":3.4000,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Supercritical CO2-assisted preparation of catalytically-active Pd/Ni nanoparticle-embedded carbon from a metal-organic framework\",\"authors\":\"Kiyoshi Matsuyama , Masashi Eiro , Ayano Shoji , Takafumi Kato\",\"doi\":\"10.1016/j.supflu.2024.106500\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>A metal nanoparticle (NP)-carbon composite derived from metal-organic frameworks (MOFs) has garnered significant attention for its high catalytic activity. This study develops a simple method for preparing Pd/Ni NP-embedded carbon from MOFs. Palladium(Ⅱ) acetate (Pd(OAc)<sub>2</sub>) is used as the precursor for Pd NPs and is loaded into the pores of Ni-MOF-74 using supercritical carbon dioxide (scCO₂) assisted immobilization. Pd/Ni NPs are prepared by reduction and pyrosis of Pd(OAc)<sub>2</sub>-loaded Ni-MOF-74. Scanning transmission electron microscopy (STEM) clearly reveals that the Pd/Ni NPs are successfully immobilized in the carbon (Pd/Ni@C) and dispersed with sizes around 10 nm. Pd/Ni@C demonstrates high catalytic activity and high durability in Suzuki–Miyaura coupling reactions, despite having lower Pd content (4.7 wt%) than commercially available Pd@C (10 wt%). The active palladium species Pd(0) on Pd/Ni@C accelerated the Suzuki-Miyaura coupling reactions, because the Ni in Pd/Ni NPs played the sacrificial role to resist Pd-oxidation.</div></div>\",\"PeriodicalId\":17078,\"journal\":{\"name\":\"Journal of Supercritical Fluids\",\"volume\":\"218 \",\"pages\":\"Article 106500\"},\"PeriodicalIF\":3.4000,\"publicationDate\":\"2024-12-19\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Supercritical Fluids\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0896844624003358\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Supercritical Fluids","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0896844624003358","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Supercritical CO2-assisted preparation of catalytically-active Pd/Ni nanoparticle-embedded carbon from a metal-organic framework
A metal nanoparticle (NP)-carbon composite derived from metal-organic frameworks (MOFs) has garnered significant attention for its high catalytic activity. This study develops a simple method for preparing Pd/Ni NP-embedded carbon from MOFs. Palladium(Ⅱ) acetate (Pd(OAc)2) is used as the precursor for Pd NPs and is loaded into the pores of Ni-MOF-74 using supercritical carbon dioxide (scCO₂) assisted immobilization. Pd/Ni NPs are prepared by reduction and pyrosis of Pd(OAc)2-loaded Ni-MOF-74. Scanning transmission electron microscopy (STEM) clearly reveals that the Pd/Ni NPs are successfully immobilized in the carbon (Pd/Ni@C) and dispersed with sizes around 10 nm. Pd/Ni@C demonstrates high catalytic activity and high durability in Suzuki–Miyaura coupling reactions, despite having lower Pd content (4.7 wt%) than commercially available Pd@C (10 wt%). The active palladium species Pd(0) on Pd/Ni@C accelerated the Suzuki-Miyaura coupling reactions, because the Ni in Pd/Ni NPs played the sacrificial role to resist Pd-oxidation.
期刊介绍：
The Journal of Supercritical Fluids is an international journal devoted to the fundamental and applied aspects of supercritical fluids and processes. Its aim is to provide a focused platform for academic and industrial researchers to report their findings and to have ready access to the advances in this rapidly growing field. Its coverage is multidisciplinary and includes both basic and applied topics.
Thermodynamics and phase equilibria, reaction kinetics and rate processes, thermal and transport properties, and all topics related to processing such as separations (extraction, fractionation, purification, chromatography) nucleation and impregnation are within the scope. Accounts of specific engineering applications such as those encountered in food, fuel, natural products, minerals, pharmaceuticals and polymer industries are included. Topics related to high pressure equipment design, analytical techniques, sensors, and process control methodologies are also within the scope of the journal.
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