TY - JOUR
T1 - Structures analyses of supported ruthenium catalysts under asymmetric hydrogenation reaction
AU - Murayama, Haruno
AU - Ikutake, Yuya
AU - Nakashima, Hiroshi
AU - Honma, Tetsuo
AU - Tokunaga, Makoto
N1 - Funding Information:
The XAFS experiments were performed at the BL14B2 beamline of Spring-8 with the approval of the Japan Synchrotron Radiation Institute (JASRI) (proposal No. 2016B1573) and at Kyushu University Beamline (BL06) of SAGA-LS (proposal Nos. 2015IIIK008, 2016IK004, and 2016IIK007).
Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/10
Y1 - 2020/10
N2 - Ruthenium oxide catalysts supported on various metal oxides, such as zirconia, ceria, and alumina, were prepared by an impregnation method using RuCl3·3H2O as a precursor. Local structures of the supported Ru oxide and oxidation states of Ru species were analyzed by in situ Ru K-edge X-ray absorption fine structure measurements. Small RuO2 particles were highly dispersed on zirconia and ceria. On the other hand, bulk RuO2 was deposited on alumina. Enantioselective hydrogenation of diethyl itaconate was achieved by combining the supported RuO2 catalysts with chiral ligands. The 1 wt% RuO2 supported on zirconia provided 95% ee and 99% yield. The Ru oxide was partially reduced during the reaction.
AB - Ruthenium oxide catalysts supported on various metal oxides, such as zirconia, ceria, and alumina, were prepared by an impregnation method using RuCl3·3H2O as a precursor. Local structures of the supported Ru oxide and oxidation states of Ru species were analyzed by in situ Ru K-edge X-ray absorption fine structure measurements. Small RuO2 particles were highly dispersed on zirconia and ceria. On the other hand, bulk RuO2 was deposited on alumina. Enantioselective hydrogenation of diethyl itaconate was achieved by combining the supported RuO2 catalysts with chiral ligands. The 1 wt% RuO2 supported on zirconia provided 95% ee and 99% yield. The Ru oxide was partially reduced during the reaction.
UR - http://www.scopus.com/inward/record.url?scp=85082555990&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85082555990&partnerID=8YFLogxK
U2 - 10.1016/j.radphyschem.2019.02.017
DO - 10.1016/j.radphyschem.2019.02.017
M3 - Article
AN - SCOPUS:85082555990
SN - 0969-806X
VL - 175
JO - Radiation Physics and Chemistry
JF - Radiation Physics and Chemistry
M1 - 108158
ER -