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Resource‐Efficient Alkane Selective Oxidation on New Crystalline Solids: Searching for Novel Catalyst Materials
Author(s) -
Glaum Robert,
WelkerNieuwoudt Cathrin,
Dobner CorneliaKatharina,
Eichelbaum Maik,
Gruchow Falk,
Heine Christian,
Karpov Andrey,
Kniep Rüdiger,
Rosowski Frank,
Schlögl Robert,
Schunk Stephan Andreas,
Titlbach Sven,
Trunschke Annette
Publication year - 2012
Publication title -
chemie ingenieur technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 36
eISSN - 1522-2640
pISSN - 0009-286X
DOI - 10.1002/cite.201200078
Subject(s) - catalysis , maleic anhydride , butane , selectivity , alkane , chemistry , vanadium , inorganic chemistry , pyrophosphate , vanadate , conductivity , phosphate , reactivity (psychology) , chemical engineering , organic chemistry , polymer , engineering , copolymer , enzyme , medicine , alternative medicine , pathology
A total of 29 hitherto unknown vanadyl(IV)‐, vanadyl(V)‐, and vanadate(V) phosphates were synthesized, structurally characterized, and tested in terms of their behavior as catalysts in the selective oxidation of n ‐butane to maleic anhydride. The new materials did not surpass the performance of commercially used (V IV O) 2 P 2 O 7 ‐based catalysts, but a silver vanadium phosphate of approximate composition Ag 2 V IV,V P 1.6 O 7+δ (0 ≤ δ ≤ 0.5), supposedly having a vanadyl(IV, V) phosphate pyrophosphate layer structure, shows promising activity and selectivity with potential for further improvements. With the aim to study the charge carrier dynamics a new method for in situ non‐contact measurement of the electric conductivity of catalysts was developed. The analysis of conductivity changes in response to the chemical potential of oxygen in the gas phase offers valuable clues to understand structure‐reactivity relationships in selective oxidation catalysis.