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Surface Modification by Amino Group Inducing for Highly Efficient Catalytic Oxidation of Toluene over a Pd/KIT-6 Catalyst
[Image: see text] Toluene is one of the typical volatile organic compounds in industry, particularly in energy and fuels production processes, which is required to be eliminated effectively to protect the environment. Catalytic oxidation of toluene is widely studied for its high efficiency, and rati...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2022
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9648143/ https://www.ncbi.nlm.nih.gov/pubmed/36385822 http://dx.doi.org/10.1021/acsomega.2c04331 |
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author | Cui, Jinglei Ren, Dan Tan, Jingjing Zhang, Huirong Guo, Yanxia Huang, Long |
author_facet | Cui, Jinglei Ren, Dan Tan, Jingjing Zhang, Huirong Guo, Yanxia Huang, Long |
author_sort | Cui, Jinglei |
collection | PubMed |
description | [Image: see text] Toluene is one of the typical volatile organic compounds in industry, particularly in energy and fuels production processes, which is required to be eliminated effectively to protect the environment. Catalytic oxidation of toluene is widely studied for its high efficiency, and rational design and synthesis of metal catalysts are keys for toluene oxidation. In this study, an efficient catalyst was designed and synthesized by introducing −NH(2) groups on the ordered mesoporous silica (KIT-6) surface to anchor and disperse Pd species, leading to Pd nanoparticles being highly dispersed with uniform particle size distribution. Meanwhile, it was found that the introduction of −NH(2) made Pd centers present an electron-rich state, and the active Pd centers could activate O(2) molecules to generate more reactive oxygen species and promote the conversion of toluene, which was verified by in situ XPS and O(2)-TPD characterization. Compared with the catalysts prepared by an impregnation method, the catalytic performance of the Pd/NH(2)-KIT-6 (0.5 wt %) catalyst was significantly improved. A conversion of 90% for toluene (2400 ppm, 24,000 mL·g(–1)·h(–1)) was achieved at 171 °C, and the toluene conversion was maintained above 90% for 900 min, displaying the excellent activity and stability of the Pd/NH(2)-KIT-6 catalyst. |
format | Online Article Text |
id | pubmed-9648143 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-96481432022-11-15 Surface Modification by Amino Group Inducing for Highly Efficient Catalytic Oxidation of Toluene over a Pd/KIT-6 Catalyst Cui, Jinglei Ren, Dan Tan, Jingjing Zhang, Huirong Guo, Yanxia Huang, Long ACS Omega [Image: see text] Toluene is one of the typical volatile organic compounds in industry, particularly in energy and fuels production processes, which is required to be eliminated effectively to protect the environment. Catalytic oxidation of toluene is widely studied for its high efficiency, and rational design and synthesis of metal catalysts are keys for toluene oxidation. In this study, an efficient catalyst was designed and synthesized by introducing −NH(2) groups on the ordered mesoporous silica (KIT-6) surface to anchor and disperse Pd species, leading to Pd nanoparticles being highly dispersed with uniform particle size distribution. Meanwhile, it was found that the introduction of −NH(2) made Pd centers present an electron-rich state, and the active Pd centers could activate O(2) molecules to generate more reactive oxygen species and promote the conversion of toluene, which was verified by in situ XPS and O(2)-TPD characterization. Compared with the catalysts prepared by an impregnation method, the catalytic performance of the Pd/NH(2)-KIT-6 (0.5 wt %) catalyst was significantly improved. A conversion of 90% for toluene (2400 ppm, 24,000 mL·g(–1)·h(–1)) was achieved at 171 °C, and the toluene conversion was maintained above 90% for 900 min, displaying the excellent activity and stability of the Pd/NH(2)-KIT-6 catalyst. American Chemical Society 2022-10-27 /pmc/articles/PMC9648143/ /pubmed/36385822 http://dx.doi.org/10.1021/acsomega.2c04331 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Cui, Jinglei Ren, Dan Tan, Jingjing Zhang, Huirong Guo, Yanxia Huang, Long Surface Modification by Amino Group Inducing for Highly Efficient Catalytic Oxidation of Toluene over a Pd/KIT-6 Catalyst |
title | Surface Modification
by Amino Group Inducing for Highly
Efficient Catalytic Oxidation of Toluene over a Pd/KIT-6 Catalyst |
title_full | Surface Modification
by Amino Group Inducing for Highly
Efficient Catalytic Oxidation of Toluene over a Pd/KIT-6 Catalyst |
title_fullStr | Surface Modification
by Amino Group Inducing for Highly
Efficient Catalytic Oxidation of Toluene over a Pd/KIT-6 Catalyst |
title_full_unstemmed | Surface Modification
by Amino Group Inducing for Highly
Efficient Catalytic Oxidation of Toluene over a Pd/KIT-6 Catalyst |
title_short | Surface Modification
by Amino Group Inducing for Highly
Efficient Catalytic Oxidation of Toluene over a Pd/KIT-6 Catalyst |
title_sort | surface modification
by amino group inducing for highly
efficient catalytic oxidation of toluene over a pd/kit-6 catalyst |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9648143/ https://www.ncbi.nlm.nih.gov/pubmed/36385822 http://dx.doi.org/10.1021/acsomega.2c04331 |
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