caa a22 4500 467945497 CHVBK 20180405193736.0 cr unu---uuuuu 170328e20050101xx s 000 0 eng 10.1007/s10975-005-0059-y doi (NATIONALLICENCE)springer-10.1007/s10975-005-0059-y (NATIONALLICENCE)springer-10.1007/PL00021994 Formation of small rhodium metal particles on the surface of a carbon support [Elektronische Daten] [A. Stakheev, O. Tkachenko, K. Klement'ev, W. Grünert, G. Bragina, I. Mashkovskii, L. Kustov] A rhodium catalyst supported on a Sibunit graphitized carbon carrier was studied by in situ XAFS spectroscopy. A comparative study of the reduction of rhodium was performed for the following two samples: Rh/C(120) dried at 120°C and Rh/C(350) calcined at 350°C. EXAFS data showed an absence of carbon atoms within the nearest environment of rhodium atoms in the Rh/C(120) uncalcined sample, which implies the absence of direct interaction between rhodium and the carbon support. In the course of the reduction of this sample (200°C), coarse particles with small metal cores were initially formed. These metal particles rapidly agglomerated upon the complete reduction of rhodium (350°C). These reduction of the Rh/C(350) calcined sample at 100-500°C resulted in the formation of small metal particles early in the reduction (100°C). The high dispersity of these particles was retained as the temperature of treatment in hydrogen was increased to 500°C due to metal-support interaction. The conversion of benzene into cyclohexane on the Rh/C(350) catalyst containing small rhodium particles was much higher at the same temperature of hydrogenation. MAIK "Nauka/Interperiodica”, 2005 Stakheev A. Zelinskii Institute of Organic Chemistry, Russian Academy of Sciences, 119991, Moscow, Russia aut Tkachenko O. Zelinskii Institute of Organic Chemistry, Russian Academy of Sciences, 119991, Moscow, Russia aut Klement'ev K. Ruhr University Bochum, D-44780, Bochum, Germany aut Grünert W. Ruhr University Bochum, D-44780, Bochum, Germany aut Bragina G. Zelinskii Institute of Organic Chemistry, Russian Academy of Sciences, 119991, Moscow, Russia aut Mashkovskii I. Zelinskii Institute of Organic Chemistry, Russian Academy of Sciences, 119991, Moscow, Russia aut Kustov L. Zelinskii Institute of Organic Chemistry, Russian Academy of Sciences, 119991, Moscow, Russia aut Kinetics and Catalysis Nauka/Interperiodica 46/1(2005-01-01), 114-122 0023-1584 46:1<114 2005 46 10975 https://doi.org/10.1007/s10975-005-0059-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10975-005-0059-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Stakheev A. Zelinskii Institute of Organic Chemistry, Russian Academy of Sciences, 119991, Moscow, Russia aut NATIONALLICENCE 700 1- Tkachenko O. Zelinskii Institute of Organic Chemistry, Russian Academy of Sciences, 119991, Moscow, Russia aut NATIONALLICENCE 700 1- Klement'ev K. Ruhr University Bochum, D-44780, Bochum, Germany aut NATIONALLICENCE 700 1- Grünert W. Ruhr University Bochum, D-44780, Bochum, Germany aut NATIONALLICENCE 700 1- Bragina G. Zelinskii Institute of Organic Chemistry, Russian Academy of Sciences, 119991, Moscow, Russia aut NATIONALLICENCE 700 1- Mashkovskii I. Zelinskii Institute of Organic Chemistry, Russian Academy of Sciences, 119991, Moscow, Russia aut NATIONALLICENCE 700 1- Kustov L. Zelinskii Institute of Organic Chemistry, Russian Academy of Sciences, 119991, Moscow, Russia aut NATIONALLICENCE 773 0- Kinetics and Catalysis Nauka/Interperiodica 46/1(2005-01-01), 114-122 0023-1584 46:1<114 2005 46 10975 NATIONALLICENCE 856 40 https://doi.org/10.1007/PL00021994 text/html Onlinezugriff via DOI Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE NATIONALLICENCE NL-springer