English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

In Situ X-ray Microscopy Reveals Particle Dynamics in a NiCo Dry Methane Reforming Catalyst under Operating Conditions

MPS-Authors
/persons/resource/persons244960

Beheshti Askari,  Abbas
Research Department DeBeer, Max Planck Institute for Chemical Energy Conversion, Max Planck Society;

/persons/resource/persons237758

al Samarai,  Mustafa
Research Department DeBeer, Max Planck Institute for Chemical Energy Conversion, Max Planck Society;

/persons/resource/persons21955

Pfänder,  Norbert
Research Department Schlögl, Max Planck Institute for Chemical Energy Conversion, Max Planck Society;

/persons/resource/persons237871

Wandzilak,  Aleksandra
Research Department DeBeer, Max Planck Institute for Chemical Energy Conversion, Max Planck Society;

/persons/resource/persons21898

Muhler,  Martin
Research Department Schlögl, Max Planck Institute for Chemical Energy Conversion, Max Planck Society;
Laboratory of Industrial Chemistry, Ruhr Universität Bochum;

/persons/resource/persons237560

DeBeer,  Serena
Research Department DeBeer, Max Planck Institute for Chemical Energy Conversion, Max Planck Society;

External Ressource
No external resources are shared
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available
Citation

Beheshti Askari, A., al Samarai, M., Morana, B., Tillmann, L., Pfänder, N., Wandzilak, A., et al. (2020). In Situ X-ray Microscopy Reveals Particle Dynamics in a NiCo Dry Methane Reforming Catalyst under Operating Conditions. ACS Catalysis, 10(11), 6223-6230. doi:10.1021/acscatal.9b05517.


Cite as: http://hdl.handle.net/21.11116/0000-0007-7F32-3
Abstract
Herein, we report the synthesis of a gamma-Al2O3-supported NiCo catalyst for dry methane reforming (DMR) and study the catalyst using in situ scanning transmission X-ray microscopy (STXM) during the reduction (activation step) and under reaction conditions. During the reduction process, the NiCo alloy particles undergo elemental segregation with Co migrating toward the center of the catalyst particles and Ni migrating to the outer surfaces. Under DMR conditions, the segregated structure is maintained, thus hinting at the importance of this structure to optimal catalytic functions. Finally, the formation of Ni-rich branches on the surface of the particles is observed during DMR, suggesting that the loss of Ni from the outer shell may play a role in the reduced stability and hence catalyst deactivation. These findings provide insights into the morphological and electronic structural changes that occur in a NiCo-based catalyst during DMR. Further, this study emphasizes the need to study catalysts under operating conditions in order to elucidate material dynamics during the reaction.