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Mechanistic study of 1,1-dimethylhydrazine transformation over Pt/SiO(2) catalyst
Catalytic oxidation of 1,1-dimethylhydrazine (UDMH) with molecular oxygen over Pt/SiO(2) was studied by in situ FTIR spectroscopy coupled with online MS monitoring of the gas phase. An unusual two-step oxidation process was detected in experiments with the pulse UDMH feeding: initial UDMH oxidation...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society of Chemistry
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9089307/ https://www.ncbi.nlm.nih.gov/pubmed/35558958 http://dx.doi.org/10.1039/c8ra07769j |
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author | Smirnov, Andrei V. Kots, Pavel A. Panteleyev, Maksim A. Ivanova, Irina I. |
author_facet | Smirnov, Andrei V. Kots, Pavel A. Panteleyev, Maksim A. Ivanova, Irina I. |
author_sort | Smirnov, Andrei V. |
collection | PubMed |
description | Catalytic oxidation of 1,1-dimethylhydrazine (UDMH) with molecular oxygen over Pt/SiO(2) was studied by in situ FTIR spectroscopy coupled with online MS monitoring of the gas phase. An unusual two-step oxidation process was detected in experiments with the pulse UDMH feeding: initial UDMH oxidation over a fresh platinum surface quickly terminates due to the blockage of active sites; a time-separated second oxidation step corresponds to combustion of the surface residue. This residue consists of C[triple bond, length as m-dash]N nitrile groups formed via decomposition of the products of non-oxidative UDMH conversion, such as dimethylamine. The two-step oxidation picture is observed over a broad range of reaction temperatures and oxygen to UDMH ratios. |
format | Online Article Text |
id | pubmed-9089307 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | The Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-90893072022-05-11 Mechanistic study of 1,1-dimethylhydrazine transformation over Pt/SiO(2) catalyst Smirnov, Andrei V. Kots, Pavel A. Panteleyev, Maksim A. Ivanova, Irina I. RSC Adv Chemistry Catalytic oxidation of 1,1-dimethylhydrazine (UDMH) with molecular oxygen over Pt/SiO(2) was studied by in situ FTIR spectroscopy coupled with online MS monitoring of the gas phase. An unusual two-step oxidation process was detected in experiments with the pulse UDMH feeding: initial UDMH oxidation over a fresh platinum surface quickly terminates due to the blockage of active sites; a time-separated second oxidation step corresponds to combustion of the surface residue. This residue consists of C[triple bond, length as m-dash]N nitrile groups formed via decomposition of the products of non-oxidative UDMH conversion, such as dimethylamine. The two-step oxidation picture is observed over a broad range of reaction temperatures and oxygen to UDMH ratios. The Royal Society of Chemistry 2018-11-01 /pmc/articles/PMC9089307/ /pubmed/35558958 http://dx.doi.org/10.1039/c8ra07769j Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/ |
spellingShingle | Chemistry Smirnov, Andrei V. Kots, Pavel A. Panteleyev, Maksim A. Ivanova, Irina I. Mechanistic study of 1,1-dimethylhydrazine transformation over Pt/SiO(2) catalyst |
title | Mechanistic study of 1,1-dimethylhydrazine transformation over Pt/SiO(2) catalyst |
title_full | Mechanistic study of 1,1-dimethylhydrazine transformation over Pt/SiO(2) catalyst |
title_fullStr | Mechanistic study of 1,1-dimethylhydrazine transformation over Pt/SiO(2) catalyst |
title_full_unstemmed | Mechanistic study of 1,1-dimethylhydrazine transformation over Pt/SiO(2) catalyst |
title_short | Mechanistic study of 1,1-dimethylhydrazine transformation over Pt/SiO(2) catalyst |
title_sort | mechanistic study of 1,1-dimethylhydrazine transformation over pt/sio(2) catalyst |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9089307/ https://www.ncbi.nlm.nih.gov/pubmed/35558958 http://dx.doi.org/10.1039/c8ra07769j |
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