Atomic-scale insights into the Cu ion distribution in zeolites used for ammonia selective catalytic reduction during early hydrothermal degradation

Masahiko Shimizu; Katsuaki Nakazawa; Hisashi Shima; Hajime Matsumoto; Takahiko Takewaki; Kazutaka Mitsuishi; Ayako Hashimoto

doi:10.1039/D5CC06274H

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Atomic-scale insights into the Cu ion distribution in zeolites used for ammonia selective catalytic reduction during early hydrothermal degradation

Masahiko Shimizu,

*^abc Katsuaki Nakazawa,

^d Hisashi Shima,^a Hajime Matsumoto,^ab Takahiko Takewaki,^a Kazutaka Mitsuishi

*^d and Ayako Hashimoto

*^bc

Author affiliations

* Corresponding authors

^a Science & Innovation Center, Mitsubishi Chemical Corporation, 1000 Kamoshida-cho, Aoba-ku, Yokohama, Kanagawa, Japan

^b Research Center for Energy and Environmental Materials, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki, Japan

^c Graduate School of Science and Technology, University of Tsukuba, 1-2-1 Sengen, Tsukuba, Ibaraki, Japan

^d Center for Basic Research on Materials, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki, Japan
E-mail: mitsuishi.kazutaka@nims.go.jp

Abstract

Early hydrothermal degradation of Cu-SSZ-13 and Cu-SSZ-39 zeolites with similar Cu content was investigated. Electron ptychography revealed the Cu occupancy at the eight-membered ring sites of Cu-SSZ-39 is lower than that of Cu-SSZ-13, clearly demonstrating that the former is more stable than the latter under hydrothermal aging conditions.

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DOI: https://doi.org/10.1039/D5CC06274H
Article type: Communication
Submitted: 04 Nov 2025
Accepted: 02 Jan 2026
First published: 08 Jan 2026
This article is Open Access

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Chem. Commun., 2026, Advance Article

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Atomic-scale insights into the Cu ion distribution in zeolites used for ammonia selective catalytic reduction during early hydrothermal degradation

M. Shimizu, K. Nakazawa, H. Shima, H. Matsumoto, T. Takewaki, K. Mitsuishi and A. Hashimoto, Chem. Commun., 2026, Advance Article , DOI: 10.1039/D5CC06274H

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Chemical Communications

Atomic-scale insights into the Cu ion distribution in zeolites used for ammonia selective catalytic reduction during early hydrothermal degradation

Abstract

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Atomic-scale insights into the Cu ion distribution in zeolites used for ammonia selective catalytic reduction during early hydrothermal degradation

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