Tuesday publication update! In this recent publication from Stanford University and Oak Ridge University, the behavior of Pt/Al₂O₃ catalysts in various gas environments was observed using in situ gas phase electron microscopy! The #AtmosphereAX system was used to observe the deactivation of these emission control catalysts. Congratulations on this great publication for Jacob Smith, Gennaro Liccardo, Melissa C.Cendejas, Michael Stone, Shyama Mandal, Frank Abild-Pedersen, Matteo Cargnello and Miaofang Chi!
This study revealed the atomic-scale dynamics of particle migration and ripening under water vapor and oxygen, behaviors that differ significantly from those seen in single-gas environments.
⚛️The authors identified a novel atomic ripening mechanism, where Pt adatom chains dissociate and migrate from Pt nanoparticles—observed only in combined gas environments.
✨These findings offer key insights into how catalysts degrade in real-world conditions, aiding the design of more durable emission control systems.
In the video we can see the sintering of nanoparticles using a 200 Torr gas environment with water vapor, oxygen and argon.
Want to read the entire paper?
Find it here:
https://www.doi.org/10.1021/acsmaterialslett.4c00422
Want to know more about the Atmosphere AX system? Find more information here:
https://www.protochips.com/solutions/in-situ-tem-solutions/in-situ-gas-cell/
#InSituMicroscopy #Protochips #FindYourBreakthrough #CatalystDegradation #EmissionControl #ETEM #Nanotechnology #MaterialScience
