caa a22 4500 475843347 CHVBK 20180406123906.0 cr unu---uuuuu 170329e20000401xx s 000 0 eng 10.1023/A:1027299931119 doi (NATIONALLICENCE)springer-10.1023/A:1027299931119 Evolution of Ti-Sn-rutile-supported V2O5-WO3 catalyst during its use in nitric oxide reduction by ammonia [Elektronische Daten] [M. Najbar, F. Mizukami, A. Białas, J. Camra, A. Wesełucha-Birczyńska, H. Izutsu, A. Góra] This paper concerns the relation between surface structure of crystalline vanadia-like active species on vanadia-tungsta catalyst and their activity in the selective reduction of NO by ammonia to nitrogen. The investigations were performed for Ti-Sn-rutile-supported isopropoxy-derived catalyst. The SCR activity and surface species structure were determined for the freshly prepared catalyst, for the catalyst previously used in NO reduction by ammonia (320 ppm NO, 335 ppm NH3 and 2.35 vol% O2) at 573 K as well as for the catalyst previously annealed at 573 K in helium stream containing 2.35 vol% O2. The crystalline islands, exposing main V2O5 surface, with some tungsten atoms substituted for V-ones, were found, with XPS and FT Raman spectroscopy, to be present at the surface of the freshly prepared catalyst. A profound evolution of the active species during the catalyst use at 573 K was observed. Dissociative water adsorption on V5+OW6+ sites is discussed as mainly responsible for the catalyst activity at 473 K and that on both V5+OW6+ and V4+OW6+ sites as determining the activity at 523 K. Kluwer Academic Publishers, 2000 rutile supported V2O5-WO3 catalyst nationallicence evolution nationallicence NO reduction nationallicence Najbar M. Department of Chemistry, Jagiellonian University, Ingardena 3, 30 060, Kraków, Poland aut Mizukami F. National Institute of Materials and Chemical Research, Tsukuba, Ibaraki 305, Japan aut Białas A. Department of Chemistry, Jagiellonian University, Ingardena 3, 30 060, Kraków, Poland aut Camra J. Regional Laboratory of Physicochemical Analyses and Structural Research, Jagiellonian University, Ingardena 3, 30 060, Kraków, Poland aut Wesełucha-Birczyńska A. Regional Laboratory of Physicochemical Analyses and Structural Research, Jagiellonian University, Ingardena 3, 30 060, Kraków, Poland aut Izutsu H. Taki, Chemical Co., Ltd., 2 Midorimachi, Befu-cho, Kakogawa, 575 01, Hyogo, Japan aut Góra A. Department of Chemistry, Jagiellonian University, Ingardena 3, 30 060, Kraków, Poland aut Topics in Catalysis Kluwer Academic Publishers-Plenum Publishers 11-12/1-4(2000-04-01), 131-138 1022-5528 11-12:1-4<131 2000 11-12 11244 https://doi.org/10.1023/A:1027299931119 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1027299931119 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Najbar M. Department of Chemistry, Jagiellonian University, Ingardena 3, 30 060, Kraków, Poland aut NATIONALLICENCE 700 1- Mizukami F. National Institute of Materials and Chemical Research, Tsukuba, Ibaraki 305, Japan aut NATIONALLICENCE 700 1- Białas A. Department of Chemistry, Jagiellonian University, Ingardena 3, 30 060, Kraków, Poland aut NATIONALLICENCE 700 1- Camra J. Regional Laboratory of Physicochemical Analyses and Structural Research, Jagiellonian University, Ingardena 3, 30 060, Kraków, Poland aut NATIONALLICENCE 700 1- Wesełucha-Birczyńska A. Regional Laboratory of Physicochemical Analyses and Structural Research, Jagiellonian University, Ingardena 3, 30 060, Kraków, Poland aut NATIONALLICENCE 700 1- Izutsu H. Taki, Chemical Co., Ltd., 2 Midorimachi, Befu-cho, Kakogawa, 575 01, Hyogo, Japan aut NATIONALLICENCE 700 1- Góra A. Department of Chemistry, Jagiellonian University, Ingardena 3, 30 060, Kraków, Poland aut NATIONALLICENCE 773 0- Topics in Catalysis Kluwer Academic Publishers-Plenum Publishers 11-12/1-4(2000-04-01), 131-138 1022-5528 11-12:1-4<131 2000 11-12 11244 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer