Reversible low-temperature redox activity and selective oxidation catalysis derived from the concerted activation of multiple metal species on Cr and Rh-incorporated ceria catalysts.

Autor: Ikemoto S; Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan. smuratsugu@chem.nagoya-u.ac.jp., Huang X; Research Center for Materials Science (RCMS) & Integrated Research Consortium on Chemical Sciences (IRCCS), Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan. mtada@chem.nagoya-u.ac.jp., Muratsugu S; Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan. smuratsugu@chem.nagoya-u.ac.jp and Japan Science and Technology Agency (JST), Precursory Research for Embryonic Science and Technology (PRESTO), 4-1-8 Honcho, Kawaguchi 332-0012, Japan., Nagase S; Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan. smuratsugu@chem.nagoya-u.ac.jp., Koitaya T; Japan Science and Technology Agency (JST), Precursory Research for Embryonic Science and Technology (PRESTO), 4-1-8 Honcho, Kawaguchi 332-0012, Japan and Department of Materials Molecular Science, Institute for Molecular Science, Myodaiji-cho, Okazaki, Aichi 444-8585, Japan., Matsui H; Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan. smuratsugu@chem.nagoya-u.ac.jp., Yokota GI; Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan. smuratsugu@chem.nagoya-u.ac.jp., Sudoh T; Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan. smuratsugu@chem.nagoya-u.ac.jp., Hashimoto A; Japan Science and Technology Agency (JST), Precursory Research for Embryonic Science and Technology (PRESTO), 4-1-8 Honcho, Kawaguchi 332-0012, Japan and In-situ Characterization Technique Development Group, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba 305-0047, Japan., Tan Y; Research Center for Materials Science (RCMS) & Integrated Research Consortium on Chemical Sciences (IRCCS), Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan. mtada@chem.nagoya-u.ac.jp., Yamamoto S; The Institute for Solid State Physics, The University of Tokyo, 5-1-5, Kashiwanoha, Kashiwa, Chiba 277-8581, Japan., Tang J; Graduate School of Engineering, University of Hyogo, 2167, Shosha, Himeji, Hyogo 671-2280, Japan., Matsuda I; The Institute for Solid State Physics, The University of Tokyo, 5-1-5, Kashiwanoha, Kashiwa, Chiba 277-8581, Japan., Yoshinobu J; The Institute for Solid State Physics, The University of Tokyo, 5-1-5, Kashiwanoha, Kashiwa, Chiba 277-8581, Japan., Yokoyama T; Department of Materials Molecular Science, Institute for Molecular Science, Myodaiji-cho, Okazaki, Aichi 444-8585, Japan., Kusaka S; Department of Chemistry and Biotechnology, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan., Matsuda R; Department of Chemistry and Biotechnology, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan., Tada M; Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan. smuratsugu@chem.nagoya-u.ac.jp and Research Center for Materials Science (RCMS) & Integrated Research Consortium on Chemical Sciences (IRCCS), Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan. mtada@chem.nagoya-u.ac.jp.
Jazyk: angličtina
Zdroj: Physical chemistry chemical physics : PCCP [Phys Chem Chem Phys] 2019 Oct 07; Vol. 21 (37), pp. 20868-20877. Date of Electronic Publication: 2019 Sep 13.
DOI: 10.1039/c9cp04625a
Abstrakt: The ceria-based catalyst incorporated with Cr and a trace amount of Rh (Cr 0.19 Rh 0.06 CeO z ) was prepared and the reversible redox performances and oxidation catalysis of CO and alcohol derivatives with O 2 at low temperatures (<373 K) were investigated. In situ X-ray absorption fine structure (XAFS), ambient-pressure X-ray photoelectron spectroscopy (AP-XPS), high angle annular dark-field scanning transmission electron microscopy (HAADF-STEM)-EDS/EELS and temperature-programmed reduction/oxidation (TPR/TPO) revealed the structures and redox mechanisms of three metals in Cr 0.19 Rh 0.06 CeO z : dispersed Rh 3+δ species (<1 nm) and Cr 6-γ O 3-x nanoparticles (∼1 nm) supported on CeO 2 in Cr 0.19 Rh 0.06 CeO z were transformed to Rh nanoclusters, Cr(OH) 3 species and CeO 2-x with two Ce 3+ -oxide layers at the surface in a concerted activation manner of the three metal species with H 2 .
Databáze: MEDLINE