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. 2021 Jan 16;8(10):nwab010. doi: 10.1093/nsr/nwab010

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© The Author(s) 2021. Published by Oxford University Press on behalf of China Science Publishing & Media Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 7. — (a) Standard NH₃-SCR performance of fresh and HTA Cu-SSZ-13 with different Cu/Al ratios. Adapted with permission from ref. [46]. (b) Estimation of Cu²⁺-2Al, [Cu(OH)]⁺-Al and CuO_x in fresh and HTA samples. Adapted with permission from ref. [48]. (c) The deactivation mechanism of HTA of Cu-SSZ-13 with different Cu contents. Adapted with permission from ref. [51].