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...

Descripción completa

Detalles Bibliográficos
Autores principales: Billeter, Emanuel, Terreni, Jasmin, Borgschulte, Andreas
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