Highly Stable and Active Solid-Solution-Alloy Three-Way Catalyst by Utilizing Configurational-Entropy Effect

Kohei Kusada; Dongshuang Wu; Yusuke Nanba; Michihisa Koyama; Tomokazu Yamamoto; Xuan Quy Tran; Takaaki Toriyama; Syo Matsumura; Ayano Ito; Katsutoshi Sato; Katsutoshi Nagaoka; Okkyun Seo; Chulho Song; Yanna Chen; Natalia Palina; Loku Singgappulige Rosantha Kumara; Satoshi Hiroi; Osami Sakata; Shogo Kawaguchi; Yoshiki Kubota; Hiroshi Kitagawa

doi:10.1002/adma.202005206

Highly Stable and Active Solid-Solution-Alloy Three-Way Catalyst by Utilizing Configurational-Entropy Effect

Adv Mater. 2021 Apr;33(16):e2005206. doi: 10.1002/adma.202005206. Epub 2021 Mar 10.

Authors

Kohei Kusada¹, Dongshuang Wu¹, Yusuke Nanba^{2

3}, Michihisa Koyama^{2

3}, Tomokazu Yamamoto^{4

5}, Xuan Quy Tran^{4

5}, Takaaki Toriyama^{4

5}, Syo Matsumura^{4

5}, Ayano Ito⁶, Katsutoshi Sato⁷, Katsutoshi Nagaoka⁸, Okkyun Seo⁹, Chulho Song⁹, Yanna Chen⁹, Natalia Palina⁹, Loku Singgappulige Rosantha Kumara⁹, Satoshi Hiroi⁹, Osami Sakata⁹, Shogo Kawaguchi¹⁰, Yoshiki Kubota¹¹, Hiroshi Kitagawa¹

Affiliations

¹ Division of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto, 606-8502, Japan.
² Center for Green Research on Energy and Environmental Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan.
³ Research Initiative for Supra-Materials, Shinshu University, 4-17-1 Wakasato, Nagano, 380-8553, Japan.
⁴ Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan.
⁵ The Ultramicroscopy Research Center, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan.
⁶ Department of Integrated Science and Technology, Faculty of Science and Technology, Oita University, 700 Dannoharu, Oita, 870-1192, Japan.
⁷ Elements Strategy Initiative for Catalysts and Batteries, Kyoto University, 1-30 Goryo-Ohara, Nishikyo-ku, Kyoto, 615-8245, Japan.
⁸ Department of Chemical Systems Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8601, Japan.
⁹ Synchrotron X-ray Group and Synchrotron X-ray Station at SPring-8, National Institute for Materials Science, Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5148, Japan.
¹⁰ Japan Synchrotron Radiation Research Institute (JASRI) SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5198, Japan.
¹¹ Department of Physical Science, Graduate School of Science, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka, 599-8531, Japan.

PMID: 33751709
DOI: 10.1002/adma.202005206

Abstract

Since 1970, people have been making every endeavor to reduce toxic emissions from automobiles. After the development of a three-way catalyst (TWC) that concurrently converts three harmful gases, carbon monoxide (CO), hydrocarbons (HCs), and nitrogen oxides (NO_x ), Rh became an essential element in automobile technology because only Rh works efficiently for catalytic NO_x reduction. However, due to the sharp price spike in 2007, numerous efforts have been made to replace Rh in TWCs. Nevertheless, Rh remains irreplaceable, and now, the price of Rh is increasing significantly again. Here, it is demonstrated that PdRuM ternary solid-solution alloy nanoparticles (NPs) exhibit highly durable and active TWC performance, which will result in a significant reduction in catalyst cost compared to Rh. This work provides insights into the design of highly durable and efficient functional alloy NPs, guiding how to best take advantage of the configurational entropy in addition to the mixing enthalpy.

Keywords: NO x reduction; catalysis; configurational entropy; nanoparticles; solid-solution alloys; three-way catalysis.

Abstract

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