Synthesis of Sustainable and Robust Heterogeneous TEMPO Catalyst utilizing Activated Carbon for Aerobic Alcohol Oxidation
The selective oxidation of alcohols is a crucial process in organic chemistry, but current methodologies have limitations such as pollution and over-oxidation. The use of 2,2,6,6-tetramethylpiperidine oxide (TEMPO) as a catalyst offers a promising approach for selective aerobic alcohol oxidation. However, the high cost of TEMPO and difficulty in catalyst recycling hinder its industrial application. This study focuses on developing a sustainable and robust heterogeneous TEMPO catalyst by immobilizing TEMPO on activated carbon (AC) through ozonation and reductive amination. The surface modification of AC through ozone carbonylation is explored, and a green and safe process is established using water as a dispersing and heat-shifting medium. The TEMPO-functionalized AC as a heterogeneous catalyst is characterized using various analytical techniques, and its catalytic performance is evaluated for continuous aerobic alcohol oxidation in a micro-packed bed reactor. The results demonstrate an extended catalyst lifetime (turnover number reaches 1465.0 for benzyl alcohol oxidation) and significant potential for industrial applications..
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Preprint| Erscheinungsjahr: |
2023 |
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| Erschienen: |
2023 |
| Enthalten in: |
chemRxiv.org - (2023) vom: 18. Okt. Zur Gesamtaufnahme - year:2023 |
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| Sprache: |
Englisch |
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| Beteiligte Personen: |
Luo, Jing [VerfasserIn] |
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| Links: |
Volltext [kostenfrei] |
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| doi: |
10.26434/chemrxiv-2023-v0c8z |
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| 520 | |a The selective oxidation of alcohols is a crucial process in organic chemistry, but current methodologies have limitations such as pollution and over-oxidation. The use of 2,2,6,6-tetramethylpiperidine oxide (TEMPO) as a catalyst offers a promising approach for selective aerobic alcohol oxidation. However, the high cost of TEMPO and difficulty in catalyst recycling hinder its industrial application. This study focuses on developing a sustainable and robust heterogeneous TEMPO catalyst by immobilizing TEMPO on activated carbon (AC) through ozonation and reductive amination. The surface modification of AC through ozone carbonylation is explored, and a green and safe process is established using water as a dispersing and heat-shifting medium. The TEMPO-functionalized AC as a heterogeneous catalyst is characterized using various analytical techniques, and its catalytic performance is evaluated for continuous aerobic alcohol oxidation in a micro-packed bed reactor. The results demonstrate an extended catalyst lifetime (turnover number reaches 1465.0 for benzyl alcohol oxidation) and significant potential for industrial applications. | ||
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| 700 | 1 | |a Xie, Bingqi |4 aut | |
| 700 | 1 | |a Zhang, Jisong |4 aut | |
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