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Towards Physical Descriptors of Active and Selective Catalysts for the Oxidation of n ‐Butane to Maleic Anhydride
Author(s) -
Eichelbaum Maik,
Glaum Robert,
Hävecker Michael,
Wittich Knut,
Heine Christian,
Schwarz Heiner,
Dobner CorneliaKatharina,
WelkerNieuwoudt Cathrin,
Trunschke Annette,
Schlögl Robert
Publication year - 2013
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.201200953
Subject(s) - butane , maleic anhydride , catalysis , raman spectroscopy , x ray photoelectron spectroscopy , vanadium , chemistry , inorganic chemistry , conductivity , redox , maleic acid , materials science , chemical engineering , organic chemistry , copolymer , physics , optics , engineering , polymer
Based on our newly developed microwave cavity perturbation technique, the microwave conductivity of diverse vanadium(III), (IV), and (V) phosphate catalysts was measured under reaction conditions for the selective oxidation of n ‐butane. The conductivity response on the gas phase was identified as a very sensitive measure for the redox kinetics, reversibility, and stability of the samples, which are important prerequisites for highly selective and active catalysts. The sensitivity achieved by our method was comparable to surface‐sensitive methods such as X‐ray photoelectron spectroscopy, whereas more conventional analytic techniques such as X‐ray diffractometry or Raman spectroscopy only indicated the stability of the bulk crystal phase under the same reaction conditions.