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Operando Shell‐Isolated Nanoparticle‐Enhanced Raman Spectroscopy of the NO Reduction Reaction over Rhodium‐Based Catalysts
Author(s) -
Ballotin Fabiane C.,
Hartman Thomas,
Koek Joris,
Geitenbeek Robin G.,
Weckhuysen Bert M.
Publication year - 2021
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.202100375
Subject(s) - catalysis , rhodium , chemistry , nanoparticle , raman spectroscopy , selectivity , reaction mechanism , mass spectrometry , reaction intermediate , surface enhanced raman spectroscopy , photochemistry , chemical engineering , inorganic chemistry , nanotechnology , materials science , organic chemistry , raman scattering , physics , engineering , optics , chromatography
Operando shell‐isolated nanoparticle‐enhanced Raman spectroscopy (SHINERS) with on‐line mass spectrometry (MS) has been used to investigate the surface species, such as NO, NOH, NO 2 , N 2 O, and reaction products of the NO reduction reaction with CO and H 2 over supported Rh‐based catalysts in the form of catalyst extrudates. By correlating surface intermediates and reaction products, new insights in the reaction mechanism could be obtained. Upon applying different reaction conditions (i. e., H 2 or CO), the selectivity of the catalytic reaction could be tuned towards the formation of N 2 . Furthermore, in the absence of Rh, no reaction products were detected. The importance of the operando SHINERS as a surface‐sensitive characterization technique in the field of heterogeneous catalysis provides routes towards a better understanding of catalytic performance.