Evaluating palladium 4d-to-2p x-ray emission spectroscopy for characterizing catalytically relevant species

Scott, Anna G., Peredkov, Sergey, Lopez-Martin, Angeles, Lewis, Richard J., Hutchings, Graham J. ORCID: https://orcid.org/0000-0001-8885-1560 and DeBeer, Serena 2026. Evaluating palladium 4d-to-2p x-ray emission spectroscopy for characterizing catalytically relevant species. Inorganic Chemistry 10.1021/acs.inorgchem.5c04266

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Abstract

X-ray absorption spectroscopy (XAS) has diverse applications in materials characterization and catalysis. While K-edge XAS can provide detailed information about electronic and geometric structures for 3d transition metals, its application to second- and third-row transition metals is often limited by substantial core–hole lifetime broadenings. For the later transition metals, higher d-electron counts further reduce the electronic structural information content due to weak and absent 1s-to-nd pre-edge features. L-shell X-ray emission spectroscopy (XES), specifically 4d-to-2p XES, can overcome these limitations by accessing transitions that are dipole allowed and have intrinsically narrower core–hole lifetime broadenings. Herein, the utility of Pd 4d-to-2p XES for in situ catalysis research in both homogeneous and heterogeneous systems is explored through the study of well-defined PdOxHy complexes and Pd nanoparticles that are relevant to Pd-based catalysts.

Item Type:	Article
Date Type:	Published Online
Status:	In Press
Schools:	Schools > Chemistry
Publisher:	American Chemical Society (ACS)
ISSN:	0020-1669
Date of First Compliant Deposit:	19 January 2026
Date of Acceptance:	8 December 2025
Last Modified:	19 Jan 2026 11:46
URI:	https://orca.cardiff.ac.uk/id/eprint/183991

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