A CO Adsorption Site Change Induced by Copper Substitution in a Ruthenium Catalyst for Enhanced CO Oxidation Activity

Bo Huang, Hirokazu Kobayashi, Tomokazu Yamamoto, Takaaki Toriyama, Syo Matsumura, Yoshihide Nishida, Katsutoshi Sato, Katsutoshi Nagaoka, Masaaki Haneda, Wei Xie, Yusuke Nanba, Michihisa Koyama, Fenglong Wang, Shogo Kawaguchi, Yoshiki Kubota, Hiroshi Kitagawa

研究成果: Contribution to journalArticle

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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.

元の言語英語
ページ(範囲)2230-2235
ページ数6
ジャーナルAngewandte Chemie - International Edition
58
発行部数8
DOI
出版物ステータス出版済み - 2 18 2019

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

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    Huang, B., Kobayashi, H., Yamamoto, T., Toriyama, T., Matsumura, S., Nishida, Y., Sato, K., Nagaoka, K., Haneda, M., Xie, W., Nanba, Y., Koyama, M., Wang, F., Kawaguchi, S., Kubota, Y., & Kitagawa, H. (2019). A CO Adsorption Site Change Induced by Copper Substitution in a Ruthenium Catalyst for Enhanced CO Oxidation Activity. Angewandte Chemie - International Edition, 58(8), 2230-2235. https://doi.org/10.1002/anie.201812325