Cargando…
Hydride Formation Diminishes CO(2) Reduction Rate on Palladium
The catalytic hydrogenation of CO(2) includes the dissociation of hydrogen and further reaction with CO(2) and intermediates. We investigate how the amount of hydrogen in the bulk of the catalyst affects the hydrogenation reaction taking place at the surface. For this, we developed an experimental s...
Autores principales: | , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2019
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6590662/ https://www.ncbi.nlm.nih.gov/pubmed/30561889 http://dx.doi.org/10.1002/cphc.201801081 |
_version_ | 1783429609260318720 |
---|---|
author | Billeter, Emanuel Terreni, Jasmin Borgschulte, Andreas |
author_facet | Billeter, Emanuel Terreni, Jasmin Borgschulte, Andreas |
author_sort | Billeter, Emanuel |
collection | PubMed |
description | The catalytic hydrogenation of CO(2) includes the dissociation of hydrogen and further reaction with CO(2) and intermediates. We investigate how the amount of hydrogen in the bulk of the catalyst affects the hydrogenation reaction taking place at the surface. For this, we developed an experimental setup described herein, based on a magnetic suspension balance and an infrared spectrometer, and measured pressure‐composition isotherms of the Pd−H system under conditions relevant for CO(2) reduction. The addition of CO(2) has no influence on the measured hydrogen absorption isotherms. The pressure dependence of the CO formation rate changes suddenly upon formation of the β‐PdH phase. This effect is attributed to a smaller surface coverage of hydrogen due to repulsive electronic interactions affecting both bulk and surface hydrogen. |
format | Online Article Text |
id | pubmed-6590662 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-65906622019-07-08 Hydride Formation Diminishes CO(2) Reduction Rate on Palladium Billeter, Emanuel Terreni, Jasmin Borgschulte, Andreas Chemphyschem Articles The catalytic hydrogenation of CO(2) includes the dissociation of hydrogen and further reaction with CO(2) and intermediates. We investigate how the amount of hydrogen in the bulk of the catalyst affects the hydrogenation reaction taking place at the surface. For this, we developed an experimental setup described herein, based on a magnetic suspension balance and an infrared spectrometer, and measured pressure‐composition isotherms of the Pd−H system under conditions relevant for CO(2) reduction. The addition of CO(2) has no influence on the measured hydrogen absorption isotherms. The pressure dependence of the CO formation rate changes suddenly upon formation of the β‐PdH phase. This effect is attributed to a smaller surface coverage of hydrogen due to repulsive electronic interactions affecting both bulk and surface hydrogen. John Wiley and Sons Inc. 2019-02-01 2019-05-16 /pmc/articles/PMC6590662/ /pubmed/30561889 http://dx.doi.org/10.1002/cphc.201801081 Text en © 2019 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA. This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes. |
spellingShingle | Articles Billeter, Emanuel Terreni, Jasmin Borgschulte, Andreas Hydride Formation Diminishes CO(2) Reduction Rate on Palladium |
title | Hydride Formation Diminishes CO(2) Reduction Rate on Palladium |
title_full | Hydride Formation Diminishes CO(2) Reduction Rate on Palladium |
title_fullStr | Hydride Formation Diminishes CO(2) Reduction Rate on Palladium |
title_full_unstemmed | Hydride Formation Diminishes CO(2) Reduction Rate on Palladium |
title_short | Hydride Formation Diminishes CO(2) Reduction Rate on Palladium |
title_sort | hydride formation diminishes co(2) reduction rate on palladium |
topic | Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6590662/ https://www.ncbi.nlm.nih.gov/pubmed/30561889 http://dx.doi.org/10.1002/cphc.201801081 |
work_keys_str_mv | AT billeteremanuel hydrideformationdiminishesco2reductionrateonpalladium AT terrenijasmin hydrideformationdiminishesco2reductionrateonpalladium AT borgschulteandreas hydrideformationdiminishesco2reductionrateonpalladium |