caa a22 4500 606173676 CHVBK 20210128100734.0 cr unu---uuuuu 210128e20150901xx s 000 0 eng 10.1007/s11244-015-0415-8 doi (NATIONALLICENCE)springer-10.1007/s11244-015-0415-8 Active Sites for Light Driven Proton Reduction in Y2Ti2O7 and CsTaWO6 Pyrochlore Catalysts Detected by In Situ EPR [Elektronische Daten] [Dirk Hollmann, Oliver Merka, Larissa Schwertmann, Roland Marschall, Michael Wark, Angelika Brückner] In situ EPR spectroscopy proved to be a versatile tool to identify active sites for photocatalytic hydrogen generation in modified Y2Ti2O7 and CsTaWO6 catalysts of pyrochlore structure, in which the metal cations are located in two different positions A and B. It was found that the B-sites exclusively occupied by titanium (Y2Ti2O7) and tantalum/tungsten (CsTaWO6) act as electron traps on the surface. From these sites, electron transfer to the co-catalysts proceeds. Thus, the B-sites are responsible for photocatalytic water reduction. Graphical Abstract: Springer Science+Business Media New York, 2015 EPR nationallicence Mechanism nationallicence Electron transfer nationallicence Pyrochlore nationallicence Photocatalysis nationallicence Hollmann Dirk Leibniz-Institute for Catalysis e.V. at the University of Rostock, Albert-Einstein-Str. 29A, 18059, Rostock, Germany aut Merka Oliver Institute for Chemistry, Carl-von-Ossietzky-University Oldenburg, Carl-von-Ossietzky-Strasse 9-11, 26129, Oldenburg, Germany aut Schwertmann Larissa Laboratory for Industrial Chemistry, Ruhr-University Bochum, Universitätsstr. 150, 44801, Bochum, Germany aut Marschall Roland Institute of Physical Chemistry, Justus-Liebig-University Giessen, Heinrich-Buff-Ring 58, 35392, Giessen, Germany aut Wark Michael Laboratory for Industrial Chemistry, Ruhr-University Bochum, Universitätsstr. 150, 44801, Bochum, Germany aut Brückner Angelika Leibniz-Institute for Catalysis e.V. at the University of Rostock, Albert-Einstein-Str. 29A, 18059, Rostock, Germany aut Topics in Catalysis Springer US; http://www.springer-ny.com 58/12-13(2015-09-01), 769-775 1022-5528 58:12-13<769 2015 58 11244 https://doi.org/10.1007/s11244-015-0415-8 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11244-015-0415-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hollmann Dirk Leibniz-Institute for Catalysis e.V. at the University of Rostock, Albert-Einstein-Str. 29A, 18059, Rostock, Germany aut NATIONALLICENCE 700 1- Merka Oliver Institute for Chemistry, Carl-von-Ossietzky-University Oldenburg, Carl-von-Ossietzky-Strasse 9-11, 26129, Oldenburg, Germany aut NATIONALLICENCE 700 1- Schwertmann Larissa Laboratory for Industrial Chemistry, Ruhr-University Bochum, Universitätsstr. 150, 44801, Bochum, Germany aut NATIONALLICENCE 700 1- Marschall Roland Institute of Physical Chemistry, Justus-Liebig-University Giessen, Heinrich-Buff-Ring 58, 35392, Giessen, Germany aut NATIONALLICENCE 700 1- Wark Michael Laboratory for Industrial Chemistry, Ruhr-University Bochum, Universitätsstr. 150, 44801, Bochum, Germany aut NATIONALLICENCE 700 1- Brückner Angelika Leibniz-Institute for Catalysis e.V. at the University of Rostock, Albert-Einstein-Str. 29A, 18059, Rostock, Germany aut NATIONALLICENCE 773 0- Topics in Catalysis Springer US; http://www.springer-ny.com 58/12-13(2015-09-01), 769-775 1022-5528 58:12-13<769 2015 58 11244