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Title: Evolution and stabilization of subnanometric metal species in confined space by in situ TEM

Understanding the behavior and dynamic structural transformation of subnanometric metal species under reaction conditions will be helpful for understanding catalytic phenomena and for developing more efficient and stable catalysts based on single atoms and clusters.In this work,the evolution and stabilization of subnanometric Pt species confined in MCM-22 zeolite has been studied by in situ transmission electron microscopy (TEM). By correlating the results from in situ TEM studies and the results obtained in a continuous fix-bed reactor,it has been possible to delimitate the factors that control the dynamic agglomeration and redispersion behavior of metal species under reaction conditions. Here, the dynamic reversible transformation between atomically dispersed Pt species and clusters/nanoparticles during CO oxidation at different temperatures has been elucidated.Ithas also been confirmed that subnanometric Pt clusters can be stabilized in MCM-22 crystallites during NO reduction with CO and H 2.
Authors:
 [1] ;  [2] ; ORCiD logo [3] ;  [1] ;  [2] ;  [1]
  1. Univ. Politecnica de Valencia-Consejo Superior de Investigaciones Cientificas (UPV-CSIC), Valencia (Spain)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Univ. de Zaragoza, Zaragoza (Spain)
Publication Date:
Report Number(s):
BNL-203609-2018-JAAM
Journal ID: ISSN 2041-1723
Grant/Contract Number:
SC0012704
Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 9; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; transmission electron microscopy; catalysis; metal clusters; zeolite; dynamic structural transformations; CO oxidation; Pt clusters; NO reduction
OSTI Identifier:
1436258