Transient kinetics studies of NO adsorption, reaction, and desorption on Pd(111) are carried out using a novel approach involving square waves of NO exposure while acquiring infrared reflection absorption spectra with high temporal resolution. The well-defined pressure waves are possible using a fast-dosing valve (100’s ms time resolution) connected to a capillary tube directing the molecules at the sample surface. Tracking the time-resolved spectra allows for mechanistic studies of the elementary steps of the different pathways this reaction can take. In this talk, we will discuss the experimental setup and the results from the study in comparison with prior literature. The figure below shows a sample dataset tracking IRRA spectra with a time resolution of 66 ms.

Transient kinetics infrared reflection absorption spectroscopy studies of NO on Pd(111)

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ACS Fall 2022

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