Ultralow-loading single-atom cobalt on graphitic carbon nitrogen with robust Co-N pairs for aerobic cyclohexane oxidation

Yuan, Enxian; Zhou, Meixia; Shi, Guojun; Jian, Panming; Hou, Xu

doi:10.1007/s12274-022-4556-3

Cited by 27 publications

(19 citation statements)

References 54 publications

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“…The identical procedure has been reproduced many times for numerous metals since then. 3,7,21,282,284,295,296,301,314,[324][325][326][327]329,[356][357][358][359][360][361][362][363][364][365][366][367][368][369][370][371][372][373] Although the powders obtained after wet impregnation were not calcined in the work reported by Chen and co-workers, most of the later reports in the literature involve a final thermal annealing step at temperatures generally between 500 and 600 1C. Indeed, annealing temperature appears to be crucial for the transition from single-atoms to nanoparticle regimes, as higher temperatures promote atom migration.…”

Section: Wet Impregnationmentioning

confidence: 99%

“…576 The singleatoms and the g-C 3 N 4 support play distinct roles in the high catalytic activity in the reaction: while the partially oxidised single-atoms simultaneously serve as active sites for the oxidation charge and CO transfer from the support, g-C 3 N 4 acts as a charge reservoir and ensures that clustering of the single-atoms is circumvented. 576 The potential use of a single of Co, Cu, Pt, Ru, and Ni atoms combined with g-C 3 N 4 was also investigated for CO, 359,577,578 benzene, 551 ethylbenzene, 384 cyclohexane, 370 silanes, 284 and methane 319 oxidation reactions. The catalytic performance of single Cu 1 atoms deposited on g-C 3 N 4 at different metal loadings was examined in the standard nitrile-azide cycloaddition reaction.…”

Section: Thermal Catalysed Applicationsmentioning

confidence: 99%

“…The identical procedure has been reproduced many times for numerous metals since then. 3,7,21,282,284,295,296,301,314,324–327,329,356–373…”

Section: Synthesis Of Sacs Based On Carbon Nitride Materialsmentioning

confidence: 99%

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Carbon nitride based materials: more than just a support for single-atom catalysis

et al. 2023

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Section: Wet Impregnationmentioning

confidence: 99%

Section: Thermal Catalysed Applicationsmentioning

confidence: 99%

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Carbon nitride based materials: more than just a support for single-atom catalysis

et al. 2023

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“…[27] The oxidations of other hydrocarbons including toluene and cyclohexane into the corresponding alcohol, aldehyde, ketone, and acid products were also studied over Co atoms deposited on CNTs and carbon nitride. [17,37] Beyond that, some other oxidative applications of Co-SACs in liquid-phase reactions also include the epoxidation of styrene, [38] sulfide oxidation, [29] etc. The selective oxidation reactions currently reported with Co-SAC are summarized in Figure 4.…”

Section: Model Oxidation Reactions For Co-sac Evaluationmentioning

confidence: 99%

Advances of Single‐Atomic Cobalt Catalysts in Liquid‐Phase Selective Oxidative Reactions

Li,

Wang,

Jiang

et al. 2023

Small Science

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Single‐atom catalysts (SACs) composed of atomically dispersed metal‐active sites embedded in supporting substrates are attracting increasing attention in liquid‐phase selective oxidation reactions with joint merits of both advanced catalytic efficiency and high stability. Co‐based SACs present superior performance in several model oxidative reactions against many other metals, thus they are recognized as a promising solution to the current high‐cost noble‐metal catalysts required for the synthesis of fine chemicals. In this review, the up‐to‐date research on the synthesized Co–SACs in selective oxidation applications is summarized. The strategies of the preparation of Co–SACs with diverse Co‐loading levels and well‐tuned morphologies and chemical structures are showcased, as well as the characterization techniques of the SACs. The applications of Co–SACs in a series of selective oxidation reactions and the influence of different oxidants on the overall reaction efficiency are discussed. In addition, the progress of the mechanism exploration involving active‐site identification, catalytic activation of oxidants, and oxidation pathway elucidation is highlighted. Meanwhile, the existing challenges and the future efforts for the development of the Co–SAC reaction system in selective oxidation processes are outlined.

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“…23%, Sel. 95%); the Co–N structure has high stability to cyclohexane oxidation . At present, there was no report on the catalytic oxidation strategy for the green preparation of peroxides from g-C 3 N 4 materials.…”

Section: Introductionmentioning

confidence: 99%

Visible Light-Driven Sandwich-like g-C₃N₄-Catalyzed Oxidation to Produce Cumene Hydroperoxide

Zhu

Zhao

et al. 2023

Ind. Eng. Chem. Res.

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Cumene hydroperoxide (CHP) is an important intermediate for the production of phenol, acetone, propylene oxide, and other raw materials in the petrochemical industry. However, due to the high reaction temperature and pressure, the current process for the industrial production of CHP has problems of potential safety hazards and high energy consumption. In this work, carbon nitride (g-C3N4) with a unique sandwich structure was discovered as a photocatalyst. It efficiently activates molecular oxygen in the air, oxidizes cumene (CM) to prepare CHP, and realizes high atom economy transformation at room temperature, atmospheric pressure, and solvent-free conditions. The continuous flow strategy was adopted to improve the gas–liquid mass transfer efficiency and reduce the phenomenon of back-mixing, thereby reducing the decomposition of the products and improving the product selectivity. The conversion rate was the same as that of the batch reaction, reaching 23%. The selectivity of the product CHP increased from 82 to 92%, and the reaction residence time was shortened from 10 h to 70 min. The catalysts have the advantages of high efficiency, easy availability, environmentally friendly, etc., and are recyclable and stable. This work provides a new strategy for establishing green, sustainable, clean, and efficient methods for the preparation of peroxides.

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Ultralow-loading single-atom cobalt on graphitic carbon nitrogen with robust Co-N pairs for aerobic cyclohexane oxidation

Cited by 27 publications

References 54 publications

Carbon nitride based materials: more than just a support for single-atom catalysis

Carbon nitride based materials: more than just a support for single-atom catalysis

Advances of Single‐Atomic Cobalt Catalysts in Liquid‐Phase Selective Oxidative Reactions

Visible Light-Driven Sandwich-like g-C₃N₄-Catalyzed Oxidation to Produce Cumene Hydroperoxide

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Ultralow-loading single-atom cobalt on graphitic carbon nitrogen with robust Co-N pairs for aerobic cyclohexane oxidation

Cited by 27 publications

References 54 publications

Carbon nitride based materials: more than just a support for single-atom catalysis

Carbon nitride based materials: more than just a support for single-atom catalysis

Advances of Single‐Atomic Cobalt Catalysts in Liquid‐Phase Selective Oxidative Reactions

Visible Light-Driven Sandwich-like g-C3N4-Catalyzed Oxidation to Produce Cumene Hydroperoxide

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Product

Resources

About

Visible Light-Driven Sandwich-like g-C₃N₄-Catalyzed Oxidation to Produce Cumene Hydroperoxide