Atomically dispersed gold anchored on carbon nitride nanosheets as effective catalyst for regioselective hydrosilylation of alkynes

Feng, Xueqing; Guo, Jiahui; Wang, Songrui; Wu, Qiong; Chen, Zheng

doi:10.1039/d1ta05528c

Cited by 13 publications

(7 citation statements)

References 44 publications

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“…Most homogeneous and heterogeneous catalysis use metal-based catalysts. − However, metals, especially precious metals, have some disadvantages, such as limited resources, high prices, easy deactivation, and difficult post-treatment (high economic cost of post-treatment and easy to lead to secondary pollution), which have become thorny problems restricting the industrial application . From the perspective of sustainable development and economic cost, the development of new carbon-based metal-free catalysts to replace metal-based catalysts will help alleviate the above problems and are expected to reduce the reliance of the catalytic industry on metals .…”

Section: Introductionmentioning

confidence: 99%

Mesoporous Nitrogen-Doped Graphitized Carbon for Recyclable Oxidation of Cyclohexene

Zhou

et al. 2022

ACS Appl. Nano Mater.

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Through the pyrolysis of melamine–formaldehyde resin (MF) at different temperatures, the obtained mesoporous nitrogen-doped graphitized carbon (MNC) materials are detected to have different compositions of nitrogen species. With the increase in the pyrolysis temperature, the nitrogen contents decreased significantly, especially the proportion of pyridinic N and pyrrolic N species. The graphitic N dominated in NNC-1000 °C (MNC-10) with extremely low defects and a highly graphitized degree. MNC-10 could realize selective oxidation of cyclohexene with 90.1% conversion and 92.0% selectivity on the allylic α-position and can be recycled five times without obvious decline in activity and selectivity. Although MNC obtained at 900 °C (MNC-9) has comparable activity to MNC-10, the recycle experiments of MNC-9 show a considerable decline in conversion. The obvious leaching of nitrogen contents, especially the pyridinic N species in MNC-9, resulted in more defects, which are unfavorable to catalysis. The N species in the carbon layer play a positive role in the delocalized electrons promoting cyclohexene activation and tert-butyl hydroperoxide decomposition. Thereby, peroxyl radicals are formed and trigger the subsequent propagation of the radical reaction.

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Section: Introductionmentioning

confidence: 99%

Mesoporous Nitrogen-Doped Graphitized Carbon for Recyclable Oxidation of Cyclohexene

Zhou

et al. 2022

ACS Appl. Nano Mater.

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“…Still focusing on noble metals, Feng et al synthesized graphitic carbon nitride doped with Au single atoms (Scheme 26). [61] The presence of coordinating nitrogen species in gC 3 N 4 helped stabilize the Au I single atoms very efficiently. A range of aromatic and aliphatic alkyne substrates underwent hydrosilylation selectively at the β-(E) position (> 98 %), and the catalyst was stable for the whole experimental campaign, i.e.…”

Section: Hydroelementationsmentioning

confidence: 99%

Single‐Atom Catalysis in Organic Synthesis

et al. 2023

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Single‐atom catalysts hold the potential to significantly impact the chemical sector, pushing the boundaries of catalysis in new, uncharted directions. These materials, featuring isolated metal species ligated on solid supports, can exist in many coordination environments, all of which have shown important functions in specific transformations. Their emergence has also provided exciting opportunities for mimicking metalloenzymes and bridging the gap between homogeneous and heterogeneous catalysis. This Review outlines the impressive progress made in recent years regarding the use of single‐atom catalysts in organic synthesis. We also illustrate potential knowledge gaps in the search for more sustainable, earth‐abundant single‐atom catalysts for synthetic applications.

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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%

“…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%

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

et al. 2023

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Atomically dispersed gold anchored on carbon nitride nanosheets as effective catalyst for regioselective hydrosilylation of alkynes

Abstract: The hydrosilylation of alkynes is a powerful process for producing vinylsilane compounds, which are synthetically versatile organosilicon reagents in organic chemistry. Herein, atomically dispersed Au anchored on g-C3N4 nanosheets is...

Cited by 13 publications

References 44 publications

Mesoporous Nitrogen-Doped Graphitized Carbon for Recyclable Oxidation of Cyclohexene

Mesoporous Nitrogen-Doped Graphitized Carbon for Recyclable Oxidation of Cyclohexene

Single‐Atom Catalysis in Organic Synthesis

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

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