Grain-growth mediated hydrogen sorption kinetics and compensation effect in single Pd nanoparticles.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
14 Sep 2021
14 Sep 2021
Historique:
received:
05
02
2021
accepted:
19
08
2021
entrez:
15
9
2021
pubmed:
16
9
2021
medline:
16
9
2021
Statut:
epublish
Résumé
Grains constitute the building blocks of polycrystalline materials and their boundaries determine bulk physical properties like electrical conductivity, diffusivity and ductility. However, the structure and evolution of grains in nanostructured materials and the role of grain boundaries in reaction or phase transformation kinetics are poorly understood, despite likely importance in catalysis, batteries and hydrogen energy technology applications. Here we report an investigation of the kinetics of (de)hydriding phase transformations in individual Pd nanoparticles. We find dramatic evolution of single particle grain morphology upon cyclic exposure to hydrogen, which we identify as the reason for the observed rapidly slowing sorption kinetics, and as the origin of the observed kinetic compensation effect. These results shed light on the impact of grain growth on kinetic processes occurring inside nanoparticles, and provide mechanistic insight in the observed kinetic compensation effect.
Identifiants
pubmed: 34521841
doi: 10.1038/s41467-021-25660-x
pii: 10.1038/s41467-021-25660-x
pmc: PMC8440611
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
5427Subventions
Organisme : EC | EU Framework Programme for Research and Innovation H2020 | H2020 Priority Excellent Science | H2020 European Research Council (H2020 Excellent Science - European Research Council)
ID : 678941/SINCAT
Organisme : Knut och Alice Wallenbergs Stiftelse (Knut and Alice Wallenberg Foundation)
ID : 2015.0055
Organisme : Knut och Alice Wallenbergs Stiftelse (Knut and Alice Wallenberg Foundation)
ID : 2016.0210
Informations de copyright
© 2021. The Author(s).
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