Following Facet-Resolved Shape- and Composition-Changes of Single PdPt Nanoparticles During Methane Oxidation by Operando CXDI

DOI

Methane plays a crucial role in the energy transition. As it is the second most abundant anthropogenic greenhouse gas, it is crucial to ensure a complete oxidation of CH4 to CO2 and H2O. Already commercially in use, PdPt catalysts were found to be highly active for CH4 oxidation with a reported conversion of 10% at a temperature of only 200°C. From ensemble averaging experiments it is difficult to determine the nanoparticle near surface composition, which is detrimental for the establishment of structure – activity relationships. We therefore propose to use operando Coherent X-ray Diffraction Imaging (CXDI) to follow the structural evolution of single PdPt NPs during CH4 oxidation. We aim to relate shape and facet-resolved strain state changes in single NPs to the catalytic activity. Furthermore, we intent to identify NP surface facet sites and strain related surface compositions most relevant for methane oxidation for NPs with initial core-shell and alloy configuration.

Identifier
DOI https://doi.org/10.15151/ESRF-ES-902986327
Metadata Access https://icatplus.esrf.fr/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatplus.esrf.fr:inv/902986327
Provenance
Creator Lydia BACHMANN; Tobias SCHULLI; Thomas Florian KELLER ORCID logo; Dmitrii LAPKIN; Gerard HINSLEY ORCID logo; Jagrati DWIVEDI; Andreas STIERLE ORCID logo
Publisher ESRF (European Synchrotron Radiation Facility)
Publication Year 2025
Rights CC-BY-4.0; https://creativecommons.org/licenses/by/4.0
OpenAccess true
Representation
Resource Type Data from large facility measurement; Collection
Discipline Particles, Nuclei and Fields