TY - JOUR
T1 - In Situ Local Temperature Mapping in Microscopy Nano-Reactors with Luminescence Thermometry
AU - van Ravenhorst, Ilse K.
AU - Geitenbeek, Robin G.
AU - van der Eerden, M. J.
AU - Tijn van Omme, J.
AU - Peréz Garza, H. Hugo
AU - Meirer, Florian
AU - Meijerink, Andries
AU - Weckhuysen, Bert M.
PY - 2019/8/26
Y1 - 2019/8/26
N2 - 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 Tset=600 °C) in vacuum and, in addition, a large offset of the local temperature of ca. 100 °C (at Tset=600 °C) in a non-vacuum (i. e., air, He and H2) 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.
AB - 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 Tset=600 °C) in vacuum and, in addition, a large offset of the local temperature of ca. 100 °C (at Tset=600 °C) in a non-vacuum (i. e., air, He and H2) 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.
KW - In Situ Spectroscopy
KW - Lanthanides
KW - Luminescence Thermometry
KW - Nano-reactor
KW - X-ray Microscopy
UR - http://www.scopus.com/inward/record.url?scp=85074096418&partnerID=8YFLogxK
U2 - 10.1002/cctc.201900985
DO - 10.1002/cctc.201900985
M3 - Article
AN - SCOPUS:85074096418
SN - 1867-3880
VL - 11
SP - 5505
EP - 5512
JO - ChemCatChem
JF - ChemCatChem
IS - 22
ER -