caa a22 4500 477080669 CHVBK 20180405111448.0 cr unu---uuuuu 170330e19960801xx s 000 0 eng 10.1007/BF02113862 doi (NATIONALLICENCE)springer-10.1007/BF02113862 Reaction pathway of benzonitrile formation during toluene ammoxidation on vanadium phosphate catalysts [Elektronische Daten] [A. Martin, H. Berndt, B. Lücke, M. Meisel] The reaction pathway of the ammoxidation of toluene on (VO)2P2O7 used as catalyst and the interaction of potential intermediates with the pyrophosphate were studied by spectroscopic techniques (FTIR, EPR), temperature-programmed chemisorptions/ reactions (TPD, TPRS) and transient studies such as the temporal analysis of products (TAP) technique. NH3 is chemisorbed on the catalyst surface, forming three different species, i.e., NH 4 + ions located on BrØnsted sites, coordinatively bound NH3 on Lewis sites and NH 2 − groups, presumably P-NH2. Toluene that is probably adsorbed on Lewis sites reacts in a first step to a benzyl radical. A subsequent partial oxidation by interaction of VIV=O groups generates a V...O=CH-C6H5 surface structure. This benzaldehyde-like surface species reacts with adsorbed NH3 according to a Langmuir-Hinshelwood mechanism. TAP experiments on ammonium-containing vanadium phosphates revealed that NH 4 + ions could act as potential N-insertion species. No formation of benzylamine as well as the generation of V=NH surface groups as possible intermediates or N-insertion sites were observed. J.C. Baltzer AG, Science Publishers, 1996 ammoxidation nationallicence vanadium phosphate catalysts nationallicence catalyst/feed interaction nationallicence reaction mechanism nationallicence FTIR spectroscopy nationallicence TAP technique nationallicence isotope experiments nationallicence TPD nationallicence TPRS nationallicence Martin A. Institut für Angewandte Chemie Berlin-Adlershof e. V., Rudower Chaussee 5, D-12489, Berlin, Germany aut Berndt H. Institut für Angewandte Chemie Berlin-Adlershof e. V., Rudower Chaussee 5, D-12489, Berlin, Germany aut Lücke B. Institut für Angewandte Chemie Berlin-Adlershof e. V., Rudower Chaussee 5, D-12489, Berlin, Germany aut Meisel M. Institut für Anorganische und Allgemeine Chemie, Humboldt Universität zu Berlin, Hessische Strasse 1-2, D-10115, Berlin, Germany aut Topics in Catalysis Baltzer Science Publishers, Baarn/Kluwer Academic Publishers 3/3-4(1996-08-01), 377-386 1022-5528 3:3-4<377 1996 3 11244 https://doi.org/10.1007/BF02113862 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02113862 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Martin A. Institut für Angewandte Chemie Berlin-Adlershof e. V., Rudower Chaussee 5, D-12489, Berlin, Germany aut NATIONALLICENCE 700 1- Berndt H. Institut für Angewandte Chemie Berlin-Adlershof e. V., Rudower Chaussee 5, D-12489, Berlin, Germany aut NATIONALLICENCE 700 1- Lücke B. Institut für Angewandte Chemie Berlin-Adlershof e. V., Rudower Chaussee 5, D-12489, Berlin, Germany aut NATIONALLICENCE 700 1- Meisel M. Institut für Anorganische und Allgemeine Chemie, Humboldt Universität zu Berlin, Hessische Strasse 1-2, D-10115, Berlin, Germany aut NATIONALLICENCE 773 0- Topics in Catalysis Baltzer Science Publishers, Baarn/Kluwer Academic Publishers 3/3-4(1996-08-01), 377-386 1022-5528 3:3-4<377 1996 3 11244 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer