caa a22 4500 475843797 CHVBK 20180406123908.0 cr unu---uuuuu 170329e20000401xx s 000 0 eng 10.1023/A:1027246419307 doi (NATIONALLICENCE)springer-10.1023/A:1027246419307 On the chemistry of ammonia over oxide catalysts: Fourier transform infrared study of ammonia, hydrazine and hydroxylamine adsorption over iron-titania catalyst [Elektronische Daten] [G. Ramis, M.A. Larrubia, G. Busca] The adsorption and transformation of ammonia over Fe2O3/TiO2 catalyst has been investigated by FT-IR spectroscopy in vacuum at increasing temperature. Ammonia is first coordinated over Lewis sites and later undergoes hydrogen abstraction giving rise either to NH2 amide species or, to its dimeric form N2H4, hydrazine. Other species tentatively identified as imide NH and nitroxyl HNO are produced further. The comparison of the infrared spectra of the species arising from NH3 and N2H4 and NH2OH adsorbed over Fe2O3/TiO2 strongly suggests that N2H4 is an intermediate in NH3 oxidation to N2 over this catalyst. So ammonia is activated in the form of NH2 species for both SCR and SCO. Ammonium ion is detected only in traces at r.t. It seems consequently demonstrated that Brønsted acidity is not necessary for the appearance of SCR and SCO activity. Kluwer Academic Publishers, 2000 FT-IR spectroscopy nationallicence Fe2O3/TiO2 catalyst nationallicence ammonia oxidation nationallicence Ramis G. Dipartimento di Ingegneria Chimica e di Processo "G.B. Bonino”, Università di Genova, P.le J.F. Kennedy 1, I-16129, Genova, Italy aut Larrubia M.A. Dipartimento di Ingegneria Chimica e di Processo "G.B. Bonino”, Università di Genova, P.le J.F. Kennedy 1, I-16129, Genova, Italy aut Busca G. Dipartimento di Ingegneria Chimica e di Processo "G.B. Bonino”, Università di Genova, P.le J.F. Kennedy 1, I-16129, Genova, Italy aut Topics in Catalysis Kluwer Academic Publishers-Plenum Publishers 11-12/1-4(2000-04-01), 161-166 1022-5528 11-12:1-4<161 2000 11-12 11244 https://doi.org/10.1023/A:1027246419307 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1027246419307 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ramis G. Dipartimento di Ingegneria Chimica e di Processo "G.B. Bonino”, Università di Genova, P.le J.F. Kennedy 1, I-16129, Genova, Italy aut NATIONALLICENCE 700 1- Larrubia M.A. Dipartimento di Ingegneria Chimica e di Processo "G.B. Bonino”, Università di Genova, P.le J.F. Kennedy 1, I-16129, Genova, Italy aut NATIONALLICENCE 700 1- Busca G. Dipartimento di Ingegneria Chimica e di Processo "G.B. Bonino”, Università di Genova, P.le J.F. Kennedy 1, I-16129, Genova, Italy aut NATIONALLICENCE 773 0- Topics in Catalysis Kluwer Academic Publishers-Plenum Publishers 11-12/1-4(2000-04-01), 161-166 1022-5528 11-12:1-4<161 2000 11-12 11244 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer