Imaging the facet surface strain state of supported multi-faceted Pt nanoparticles during reaction.

ABSTRACT: Nanostructures with specific crystallographic planes display distinctive physico-chemical properties because of their unique atomic arrangements, resulting in widespread applications in catalysis, energy conversion or sensing. Understanding strain dynamics and their relationship with crystallographic facets have been largely unexplored. Here, we reveal in situ, in three-dimensions and at the nanoscale, the volume, surface and interface strain evolution of single supported platinum nanocrystals during reaction using coherent x-ray diffractive imaging. Interestingly, identical {hkl} facets show equivalent catalytic response during non-stoichiometric cycles. Periodic strain variations are rationalised in terms of O₂ adsorption or desorption during O₂ exposure or CO oxida

SUBMITTER: Dupraz M 

PROVIDER: S-EPMC9151645 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature