In situ/operando spectroscopic studies on NH3-SCR reactions catalyzed by a phosphorus-modified Cu-CHA zeolite

Kubota, Hiroe; Liu, Chong; Amada, Takehiro; Kon, Kenichi; Toyao, Takashi; Maeno, Zen; Ueda, Kakuya; Satsuma, Atsushi; Tsunoji, Nao; Sano, Tsuneji; Shimizu, Kenichi

In situ/operando spectroscopic studies on NH3-SCR reactions catalyzed by a phosphorus-modified Cu-CHA zeolite

Kubota, Hiroe; Liu, Chong; Amada, Takehiro et al.

Catalysis today, 2021, 376, 73-80

Permalink : https://hdl.handle.net/2115/90385

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アクセス権	open access
URI	https://hdl.handle.net/2115/90385
タイトル	In situ/operando spectroscopic studies on NH3-SCR reactions catalyzed by a phosphorus-modified Cu-CHA zeolite
著者	Kubota, Hiroe ; Liu, Chong ; Amada, Takehiro ; Kon, Kenichi ; Toyao, Takashi ; Maeno, Zen ; Ueda, Kakuya ; Satsuma, Atsushi ; Tsunoji, Nao ; Sano, Tsuneji ; Shimizu, Kenichi
著者名 Kubota, Hiroe
著者名 Liu, Chong
著者名 Amada, Takehiro
著者名 Kon, Kenichi
e-Rad_Researcher 80775388 著者名 Toyao, Takashi
e-Rad_Researcher 30721154 著者名 Maeno, Zen
著者名 Ueda, Kakuya
e-Rad_Researcher 00215758 著者名 Satsuma, Atsushi
e-Rad_Researcher 40758166 著者名 Tsunoji, Nao
e-Rad_Researcher 80251974 著者名 Sano, Tsuneji
e-Rad_Researcher 60324000 著者名 Shimizu, Kenichi
言語	英語
キーワード	Cu-exchanged CHA zeolite
	NH3-SCR
	in situ/operando spectroscopy
	Phosphorus modification
発行日	2021-09-15
出版者	Elsevier
収録物名	Catalysis today
巻(号)	376
ページ	73-80
抄録	The modification of Cu-exchanged zeolites with phosphorus represents a promising method to enhance their hydrothermal stability, which is of pivotal importance for catalysts that promote the selective catalytic reduction of NO with ammonia (NH3-SCR). In this study, we investigated the reaction mechanism of NH3-SCR catalyzed by a phosphorus-modified CHA zeolite that contains active Cu species (Cu-P-CHA), and assessed the effect of the phosphorus modification on the hydrothermal stability of the catalyst by employing in situ/operando spectroscopic methods. In their entirety, the combined results from in situ/operando IR, UV-vis, and XANES experiments revealed that the NH3-SCR process over Cu-P-CHA proceeds via the reduction of Cu(II) to Cu(I) followed by a reoxidation of Cu(I) to Cu(II). In addition, we found that the phosphorus modification improved the hydro thermal durability of the catalyst by retaining a higher amount of the redox-active Cu species and the zeolite framework.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
権利情報	Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
権利情報	© 2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
PISSN	0920-5861
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1016/j.cattod.2020.07.084