Multimodal Operando Electron Microscopy Approach to Study Pt Catalyst During CO Oxidation Reaction

Insights into Chemical Dynamics and Their Impact on the Reactivity of Pt Nanoparticles during CO Oxidation by Operando TEM

“…In this present study, the different interactions between reactants and catalysts over the entire range of catalytic conversions were investigated. Several ex situ and in situ TEM and HRTEM studies have reported on morphological and structural changes of Pt nanoparticles induced by different gaseous environments and temperatures. ,,− For instance, the reshaping and facetting of Pt nanoparticles during thermal treatment in different reductive and oxidative environments have been observed. Thermal treatment in H 2 , ,,− CO, ,,, or vacuum , have been shown to lead to more facetted particles with the dominant Pt(111), Pt(100), and Pt(110) facets.…”

Direct Observation of Sample Dynamics in the Gaseous Environment: A Perspective on Current Trends and Future Directions of In Situ Gas Cell Transmission Electron Microscopy

“…The detection sensitivity is increased by directing the leaving gas entirely through the QMS. In order to test the functionality of the system, CO oxidation by Pt catalytic nanoparticles was used and it was successful in demonstrating the scope of this method, including operation at high temperatures and a range of pressures and different gas systems, etc. − Several other reports on the use of this system have been published, demonstrating functionality for many reaction schemes and compatibility with any MEMS-based gas cell holder. ,,,, …”

Pt Carbide Formation During Graphitic Carbon Growth Studied Using in situ TEM

“…3 However, using in situ transmission electron microscopy techniques allows to study dynamical processes live as they happen and at high spatial resolution. [4][5][6][7] In the present work, we studied Pt particles catalysing the growth of graphitic carbon structures using in situ TEM in a gas cell. Imaging (as shown in Figure 1) and fast Fourier transformation (FFT) analysis (Figure 2) were combined to detect and track the formation of Pt carbide.…”