Probing active sites in Cux Pdy cluster catalysts by machine-learning-assisted X-ray absorption spectroscopy

0544599 - ÚFCH JH 2022 RIV US eng J - Journal Article
Liu, Y. - Halder, A. - Seifert, S. - Marcella, N. - Vajda, Štefan - Frenkel, A. I.
Probing active sites in Cux Pdy cluster catalysts by machine-learning-assisted X-ray absorption spectroscopy.
ACS Applied Materials and Interfaces. Roč. 13, č. 45 (2021), s. 53363-53374. ISSN 1944-8244. E-ISSN 1944-8252
EU Projects: European Commission(XE) 810310 - J. Heyrovsky Chair
Institutional support: RVO:61388955
Keywords : deep learning * machine learning * nanocatalysts * nanoclusters * size-selected clusters * xanes
OECD category: Physical chemistry
Impact factor: 10.383, year: 2021
Method of publishing: Limited access

Size-selected clusters are important model catalysts because of their narrow size and compositional distributions, as well as enhanced activity and selectivity in many reactions. Still, their structure-activity relationships are, in general, elusive. The main reason is the difficulty in identifying and quantitatively characterizing the catalytic active site in the clusters when it is confined within subnanometric dimensions and under the continuous structural changes the clusters can undergo in reaction conditions. Using machine learning approaches for analysis of the operando X-ray absorption near-edge structure spectra, we obtained accurate speciation of the CuxPdy cluster types during the propane oxidation reaction and the structural information about each type. As a result, we elucidated the information about active species and relative roles of Cu and Pd in the clusters.
Permanent Link: http://hdl.handle.net/11104/0321438