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Plasma-Catalytic CO(2) Hydrogenation over a Pd/ZnO Catalyst: In Situ Probing of Gas-Phase and Surface Reactions

[Image: see text] Plasma-catalytic CO(2) hydrogenation is a complex chemical process combining plasma-assisted gas-phase and surface reactions. Herein, we investigated CO(2) hydrogenation over Pd/ZnO and ZnO in a tubular dielectric barrier discharge (DBD) reactor at ambient pressure. Compared to the...

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Autores principales: Sun, Yuhai, Wu, Junliang, Wang, Yaolin, Li, Jingjing, Wang, Ni, Harding, Jonathan, Mo, Shengpeng, Chen, Limin, Chen, Peirong, Fu, Mingli, Ye, Daiqi, Huang, Jun, Tu, Xin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2022
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9400056/
https://www.ncbi.nlm.nih.gov/pubmed/36032530
http://dx.doi.org/10.1021/jacsau.2c00028
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author Sun, Yuhai
Wu, Junliang
Wang, Yaolin
Li, Jingjing
Wang, Ni
Harding, Jonathan
Mo, Shengpeng
Chen, Limin
Chen, Peirong
Fu, Mingli
Ye, Daiqi
Huang, Jun
Tu, Xin
author_facet Sun, Yuhai
Wu, Junliang
Wang, Yaolin
Li, Jingjing
Wang, Ni
Harding, Jonathan
Mo, Shengpeng
Chen, Limin
Chen, Peirong
Fu, Mingli
Ye, Daiqi
Huang, Jun
Tu, Xin
author_sort Sun, Yuhai
collection PubMed
description [Image: see text] Plasma-catalytic CO(2) hydrogenation is a complex chemical process combining plasma-assisted gas-phase and surface reactions. Herein, we investigated CO(2) hydrogenation over Pd/ZnO and ZnO in a tubular dielectric barrier discharge (DBD) reactor at ambient pressure. Compared to the CO(2) hydrogenation using Plasma Only or Plasma + ZnO, placing Pd/ZnO in the DBD almost doubled the conversion of CO(2) (36.7%) and CO yield (35.5%). The reaction pathways in the plasma-enhanced catalytic hydrogenation of CO(2) were investigated by in situ Fourier transform infrared (FTIR) spectroscopy using a novel integrated in situ DBD/FTIR gas cell reactor, combined with online mass spectrometry (MS) analysis, kinetic analysis, and emission spectroscopic measurements. In plasma CO(2) hydrogenation over Pd/ZnO, the hydrogenation of adsorbed surface CO(2) on Pd/ZnO is the dominant reaction route for the enhanced CO(2) conversion, which can be ascribed to the generation of a ZnO(x) overlay as a result of the strong metal–support interactions (SMSI) at the Pd–ZnO interface and the presence of abundant H species at the surface of Pd/ZnO; however, this important surface reaction can be limited in the Plasma + ZnO system due to a lack of active H species present on the ZnO surface and the absence of the SMSI. Instead, CO(2) splitting to CO, both in the plasma gas phase and on the surface of ZnO, is believed to make an important contribution to the conversion of CO(2) in the Plasma + ZnO system.
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spelling pubmed-94000562022-08-25 Plasma-Catalytic CO(2) Hydrogenation over a Pd/ZnO Catalyst: In Situ Probing of Gas-Phase and Surface Reactions Sun, Yuhai Wu, Junliang Wang, Yaolin Li, Jingjing Wang, Ni Harding, Jonathan Mo, Shengpeng Chen, Limin Chen, Peirong Fu, Mingli Ye, Daiqi Huang, Jun Tu, Xin JACS Au [Image: see text] Plasma-catalytic CO(2) hydrogenation is a complex chemical process combining plasma-assisted gas-phase and surface reactions. Herein, we investigated CO(2) hydrogenation over Pd/ZnO and ZnO in a tubular dielectric barrier discharge (DBD) reactor at ambient pressure. Compared to the CO(2) hydrogenation using Plasma Only or Plasma + ZnO, placing Pd/ZnO in the DBD almost doubled the conversion of CO(2) (36.7%) and CO yield (35.5%). The reaction pathways in the plasma-enhanced catalytic hydrogenation of CO(2) were investigated by in situ Fourier transform infrared (FTIR) spectroscopy using a novel integrated in situ DBD/FTIR gas cell reactor, combined with online mass spectrometry (MS) analysis, kinetic analysis, and emission spectroscopic measurements. In plasma CO(2) hydrogenation over Pd/ZnO, the hydrogenation of adsorbed surface CO(2) on Pd/ZnO is the dominant reaction route for the enhanced CO(2) conversion, which can be ascribed to the generation of a ZnO(x) overlay as a result of the strong metal–support interactions (SMSI) at the Pd–ZnO interface and the presence of abundant H species at the surface of Pd/ZnO; however, this important surface reaction can be limited in the Plasma + ZnO system due to a lack of active H species present on the ZnO surface and the absence of the SMSI. Instead, CO(2) splitting to CO, both in the plasma gas phase and on the surface of ZnO, is believed to make an important contribution to the conversion of CO(2) in the Plasma + ZnO system. American Chemical Society 2022-05-31 /pmc/articles/PMC9400056/ /pubmed/36032530 http://dx.doi.org/10.1021/jacsau.2c00028 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Sun, Yuhai
Wu, Junliang
Wang, Yaolin
Li, Jingjing
Wang, Ni
Harding, Jonathan
Mo, Shengpeng
Chen, Limin
Chen, Peirong
Fu, Mingli
Ye, Daiqi
Huang, Jun
Tu, Xin
Plasma-Catalytic CO(2) Hydrogenation over a Pd/ZnO Catalyst: In Situ Probing of Gas-Phase and Surface Reactions
title Plasma-Catalytic CO(2) Hydrogenation over a Pd/ZnO Catalyst: In Situ Probing of Gas-Phase and Surface Reactions
title_full Plasma-Catalytic CO(2) Hydrogenation over a Pd/ZnO Catalyst: In Situ Probing of Gas-Phase and Surface Reactions
title_fullStr Plasma-Catalytic CO(2) Hydrogenation over a Pd/ZnO Catalyst: In Situ Probing of Gas-Phase and Surface Reactions
title_full_unstemmed Plasma-Catalytic CO(2) Hydrogenation over a Pd/ZnO Catalyst: In Situ Probing of Gas-Phase and Surface Reactions
title_short Plasma-Catalytic CO(2) Hydrogenation over a Pd/ZnO Catalyst: In Situ Probing of Gas-Phase and Surface Reactions
title_sort plasma-catalytic co(2) hydrogenation over a pd/zno catalyst: in situ probing of gas-phase and surface reactions
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9400056/
https://www.ncbi.nlm.nih.gov/pubmed/36032530
http://dx.doi.org/10.1021/jacsau.2c00028
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