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In Situ Local Temperature Mapping in Microscopy Nano‐Reactors with Luminescence Thermometry
Author(s) -
Ravenhorst Ilse K.,
Geitenbeek Robin G.,
Eerden M. J.,
Tijn van Omme J.,
Peréz Garza H. Hugo,
Meirer Florian,
Meijerink Andries,
Weckhuysen Bert M.
Publication year - 2019
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201900985
Subject(s) - luminescence , microscopy , materials science , nano , analytical chemistry (journal) , in situ , temperature gradient , catalysis , temperature measurement , nanotechnology , chemistry , optoelectronics , optics , thermodynamics , composite material , physics , chromatography , biochemistry , organic chemistry , quantum mechanics
In situ and operando experiments play a crucial role in understanding the mechanisms behind catalytic processes. In these experiments it is important to have precise control over pressure and temperature. In this work, we use luminescence thermometry to map the temperature distribution in a 300 μm microelectromechanical system nano‐reactor with a resolution of ca . 10 μm. These measurements showed a temperature gradient between the center and edge of the heater of ca. 200 °C (at T set =600 °C) in vacuum and, in addition, a large offset of the local temperature of ca. 100 °C (at T set =600 °C) in a non‐vacuum ( i. e ., air, He and H 2 ) environment. The observed temperature heterogeneities can explain differences observed in the reduction behavior of Co‐based Fischer‐Tropsch synthesis catalyst particles at different locations in the nano‐reactor as determined by scanning transmission X‐ray microscopy.