TY - JOUR
T1 - A CO Adsorption Site Change Induced by Copper Substitution in a Ruthenium Catalyst for Enhanced CO Oxidation Activity
AU - Huang, Bo
AU - Kobayashi, Hirokazu
AU - Yamamoto, Tomokazu
AU - Toriyama, Takaaki
AU - Matsumura, Syo
AU - Nishida, Yoshihide
AU - Sato, Katsutoshi
AU - Nagaoka, Katsutoshi
AU - Haneda, Masaaki
AU - Xie, Wei
AU - Nanba, Yusuke
AU - Koyama, Michihisa
AU - Wang, Fenglong
AU - Kawaguchi, Shogo
AU - Kubota, Yoshiki
AU - Kitagawa, Hiroshi
N1 - Funding Information:
This research was supported by the ACCEL program, Japan Science and Technology Agency (JST), JPMJAC1501, and Grants-in-Aid for JSPS Fellows (NO. 27-2581) from the Japan Society for the Promotion of Science (JSPS). STEM observations were performed as part of a program conducted by the Advanced Characterization Nanotechnology Platform sponsored by the MEXT of the Japanese Government. Synchrotron XRD measurements were carried out at SPring-8 under proposal No. 2015B1467 and 2017A11189. The activities of the INAMORI Frontier Research Center, Kyushu University are supported by KYOCERA Corporation.
Publisher Copyright:
© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2019/2/18
Y1 - 2019/2/18
N2 - Ru is an important catalyst in many types of reactions. Specifically, Ru is well known as the best monometallic catalyst for oxidation of carbon monoxide (CO) and has been practically used in residential fuel cell systems. However, Ru is a minor metal, and the supply risk often causes violent fluctuations in the price of Ru. Performance-improved and cost-reduced solid-solution alloy nanoparticles of the Cu-Ru system for CO oxidation are now presented. Over the whole composition range, all of the Cu x Ru 1−x nanoparticles exhibit significantly enhanced CO oxidation activities, even at 70 at % of inexpensive Cu, compared to Ru nanoparticles. Only 5 at % replacement of Ru with Cu provided much better CO oxidation activity, and the maximum activity was achieved by 20 at % replacement of Ru by Cu. The origin of the high catalytic performance was found as CO site change by Cu substitution, which was investigated using in situ Fourier transform infrared spectra and theoretical calculations.
AB - Ru is an important catalyst in many types of reactions. Specifically, Ru is well known as the best monometallic catalyst for oxidation of carbon monoxide (CO) and has been practically used in residential fuel cell systems. However, Ru is a minor metal, and the supply risk often causes violent fluctuations in the price of Ru. Performance-improved and cost-reduced solid-solution alloy nanoparticles of the Cu-Ru system for CO oxidation are now presented. Over the whole composition range, all of the Cu x Ru 1−x nanoparticles exhibit significantly enhanced CO oxidation activities, even at 70 at % of inexpensive Cu, compared to Ru nanoparticles. Only 5 at % replacement of Ru with Cu provided much better CO oxidation activity, and the maximum activity was achieved by 20 at % replacement of Ru by Cu. The origin of the high catalytic performance was found as CO site change by Cu substitution, which was investigated using in situ Fourier transform infrared spectra and theoretical calculations.
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U2 - 10.1002/anie.201812325
DO - 10.1002/anie.201812325
M3 - Article
C2 - 30517769
AN - SCOPUS:85059187107
VL - 58
SP - 2230
EP - 2235
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
SN - 1433-7851
IS - 8
ER -