Operando Laboratory-Based Multi-Edge X-Ray Absorption Near-Edge Spectroscopy of Solid Catalysts
Abstract
Laboratory-based X-ray absorption spectroscopy (XAS) and especially X-ray absorption near-edge structure (XANES) offers new opportunities in catalyst characterization and presents not only an alternative, but also a complementary approach to precious beamtime at synchrotron facilities. We successfully designed a laboratory-based setup for performing operando, quasi-simultaneous XANES analysis at multiple K-edges, more specifically, operando XANES of mono-, bi-, and trimetallic CO2 hydrogenation catalysts containing Ni, Fe, and Cu. Detailed operando XANES studies of the multielement solid catalysts revealed metal-dependent differences in the reducibility and re-oxidation behavior and their influence on the catalytic performance in CO2 hydrogenation. The applicability of operando laboratory-based XANES at multiple K-edges paves the way for advanced multielement catalyst characterization complementing detailed studies at synchrotron facilities. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000579641Publication status
publishedExternal links
Journal / series
Angewandte Chemie. International EditionVolume
Pages / Article No.
Publisher
Wiley-VCHSubject
Alloys; CO2 Hydrogenation; Heterogeneous Catalysis; Multielement Catalysts; X-Ray Absorption SpectroscopyMore
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