caa a22 4500 469056681 CHVBK 20180323132845.0 cr unu---uuuuu 170328e19920601xx s 000 0 eng 10.1163/156856792X00092 doi (NATIONALLICENCE)springer-10.1163/156856792X00092 Role of the nature of copper sites in the activity of copper-based catalysts for no conversion [Elektronische Daten] [G. Centi, S. Perathoner, Y. Shioya, M. Anpo] The activities of the copper-based catalysts, Cu2+ /SiO2,Cu2+ /Vycor and Cu2+/ZSM-5, and V2O5/TiO2 for NO conversion to N2 in the presence or absence of NH3 and/or O2 have been investigated. The Cu2+ /ZSM-5 catalyst exhibited the highest activity, even higher than that of V2O5/TiO2. Photoluminescence studies of the dehydrated copper-based catalysts have suggested that the copper ions anchored onto ZSM-5 locate as isolated copper species near Brönsted sites in the zeolite channels while the copper ions anchored onto Vycor and SiO2 locate mainly as copper dimer forms. These results suggest the role of copper ions which are stabilized with near-lying oxygen vacancies created by dehydroxylation of the zeolite, in NO conversion. As a result, it may be concluded that the isolated copper ions near Brönsted sites play a significant role in NO conversion but dimeric or polynuclear copper species are less effective for the reaction. Springer, 1992 Centi G. Dipartimento di Chimica Industriale e dei Materiali, Universtta di Bologna, Viale Risorgimenoo 4, 40136, Bologna, Italy aut Perathoner S. Dipartimento di Chimica Industriale e dei Materiali, Universtta di Bologna, Viale Risorgimenoo 4, 40136, Bologna, Italy aut Shioya Y. Department of Applied Chemistry, College of Engineering, Universtty of Osaka Prefecture, 591, Sakai, Osaka, Japan aut Anpo M. Department of Applied Chemistry, College of Engineering, Universtty of Osaka Prefecture, 591, Sakai, Osaka, Japan aut Research on Chemical Intermediates Springer Netherlands 17/2(1992-06-01), 125-135 0922-6168 17:2<125 1992 17 11164 https://doi.org/10.1163/156856792X00092 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1163/156856792X00092 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Centi G. Dipartimento di Chimica Industriale e dei Materiali, Universtta di Bologna, Viale Risorgimenoo 4, 40136, Bologna, Italy aut NATIONALLICENCE 700 1- Perathoner S. Dipartimento di Chimica Industriale e dei Materiali, Universtta di Bologna, Viale Risorgimenoo 4, 40136, Bologna, Italy aut NATIONALLICENCE 700 1- Shioya Y. Department of Applied Chemistry, College of Engineering, Universtty of Osaka Prefecture, 591, Sakai, Osaka, Japan aut NATIONALLICENCE 700 1- Anpo M. Department of Applied Chemistry, College of Engineering, Universtty of Osaka Prefecture, 591, Sakai, Osaka, Japan aut NATIONALLICENCE 773 0- Research on Chemical Intermediates Springer Netherlands 17/2(1992-06-01), 125-135 0922-6168 17:2<125 1992 17 11164 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer