Catalytic Impedance Spectroscopy: Concept and Application on CO2 Methanation
Complex modeling of periodic excitation combined with time-resolved product detection is used to describe the complex response function of a catalytic system. We describe this concept of catalytic impedance spectroscopy (CIS) and the underlying general experimental approach and a concrete setup. The feasibility of CIS is experimentally demonstrated along the catalytic CO2 methanation reaction. The measurements confirm the theoretically anticipated rate-determining step of HCO* → CH* on Ni catalysts. Limitations and prospects of CIS to unravel reaction mechanisms are discussed.
October 11, 2024

Research paper Journal of Physical Chemistry

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Catalytic Impedance Spectroscopy: Concept and Application on CO2 Methanation
Andreas Borgschulte, Marco Achermann, and Marin Nikolic
The Journal of Physical Chemistry Letters 2024 15 (42), 10451-10456
DOI: 10.1021/acs.jpclett.4c02442
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