caa a22 4500 463253914 CHVBK 20180405153348.0 cr unu---uuuuu 170326e20070801xx s 000 0 eng 10.1007/s10562-007-9109-6 doi (NATIONALLICENCE)springer-10.1007/s10562-007-9109-6 Remarkable effect of addition of In and Pb on the reduction of N2O by CO over SiO2 supported Pd catalysts [Elektronische Daten] [Takashi Hirano, Yuiko Kazahaya, Akio Nakamura, Toshihiro Miyao, Shuichi Naito] The effect of addition of In and Pb on the reduction of N2O by CO was studied over SiO2 supported Pd catalysts, using a closed gas circulation system as well as in-situ infrared spectroscopy. Formation of intermetallic compounds such as Pd0.48In0.52, Pd3Pb and Pd3Pb2 was observed which caused a drastic enhancement of the rate of N2 formation. The infrared spectroscopic analyses revealed a weakening of the adsorption strength of CO on Pd metal by the formation of intermetallic compounds, which is likely the main reason for the enhancement of the reaction rate. From a kinetic investigation as well as in situ FT-IR observation during the N2O-CO reaction, a redox mechanism was proposed involving the oxidation of the surface by N2O followed by its reduction by CO. Over Pd/SiO2, the former process seems to be the rate limiting step because of the inhibition of N2O activation by strongly adsorbed CO. By adding In or Pb, the rate limiting step shifted to the latter process, which resulted in a large enhancement in the rate of N2 formation. Springer Science+Business Media, LLC, 2007 Hirano Takashi Department of Material and Life Chemistry, Kanagawa University, 3-27-1, Rokkakubashi, Kanagawa-ku, 221-8686, Yokohama, Japan aut Kazahaya Yuiko Department of Material and Life Chemistry, Kanagawa University, 3-27-1, Rokkakubashi, Kanagawa-ku, 221-8686, Yokohama, Japan aut Nakamura Akio Department of Material and Life Chemistry, Kanagawa University, 3-27-1, Rokkakubashi, Kanagawa-ku, 221-8686, Yokohama, Japan aut Miyao Toshihiro Department of Material and Life Chemistry, Kanagawa University, 3-27-1, Rokkakubashi, Kanagawa-ku, 221-8686, Yokohama, Japan aut Naito Shuichi Department of Material and Life Chemistry, Kanagawa University, 3-27-1, Rokkakubashi, Kanagawa-ku, 221-8686, Yokohama, Japan aut Catalysis Letters Springer US; http://www.springer-ny.com 117/1-2(2007-08-01), 73-78 1011-372X 117:1-2<73 2007 117 10562 https://doi.org/10.1007/s10562-007-9109-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10562-007-9109-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hirano Takashi Department of Material and Life Chemistry, Kanagawa University, 3-27-1, Rokkakubashi, Kanagawa-ku, 221-8686, Yokohama, Japan aut NATIONALLICENCE 700 1- Kazahaya Yuiko Department of Material and Life Chemistry, Kanagawa University, 3-27-1, Rokkakubashi, Kanagawa-ku, 221-8686, Yokohama, Japan aut NATIONALLICENCE 700 1- Nakamura Akio Department of Material and Life Chemistry, Kanagawa University, 3-27-1, Rokkakubashi, Kanagawa-ku, 221-8686, Yokohama, Japan aut NATIONALLICENCE 700 1- Miyao Toshihiro Department of Material and Life Chemistry, Kanagawa University, 3-27-1, Rokkakubashi, Kanagawa-ku, 221-8686, Yokohama, Japan aut NATIONALLICENCE 700 1- Naito Shuichi Department of Material and Life Chemistry, Kanagawa University, 3-27-1, Rokkakubashi, Kanagawa-ku, 221-8686, Yokohama, Japan aut NATIONALLICENCE 773 0- Catalysis Letters Springer US; http://www.springer-ny.com 117/1-2(2007-08-01), 73-78 1011-372X 117:1-2<73 2007 117 10562 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer