Quasi- quantification of Cu() ions in Cu-SSZ-13 catalyst by an NH temperature-programmed reduction method

Quasi- quantification of Cu() ions in Cu-SSZ-13 catalyst by an NH temperature-programmed reduction method

A quasi- operando NH 3 temperature-programmed reduction method (NH 3 -TPR), with N 2 :Cu = 1:1, is developed to quantify total Cu( ii ) ions in Cu-SSZ-13 quenched from SCR-relevant reactions, and its accuracy is confirmed by in situ EPR. [Cu(OH)] + -Z and Cu 2+ -2Z can be further distinguished by NH...

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Veröffentlicht in:Chemical communications (Cambridge, England) England), 2021-02, Vol.57 (15), p.1891-1894
Hauptverfasser: Ma, Yue, Wu, Xiaodong, Ding, Jiancai, Liu, Liping, Jin, Baofang, Walter, Eric D, Ran, Rui, Si, Zhichun, Gao, Feng, Weng, Duan
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container_end_page 1894
container_issue 15
container_start_page 1891
container_title Chemical communications (Cambridge, England)
container_volume 57
creator Ma, Yue
Wu, Xiaodong
Ding, Jiancai
Liu, Liping
Jin, Baofang
Walter, Eric D
Ran, Rui
Si, Zhichun
Gao, Feng
Weng, Duan
description A quasi- operando NH 3 temperature-programmed reduction method (NH 3 -TPR), with N 2 :Cu = 1:1, is developed to quantify total Cu( ii ) ions in Cu-SSZ-13 quenched from SCR-relevant reactions, and its accuracy is confirmed by in situ EPR. [Cu(OH)] + -Z and Cu 2+ -2Z can be further distinguished by NH 3 reduction temperatures, and their different reducibility in SCR is revealed. A quasi- operando NH 3 -TPR method can quantify two Cu( ii ) ions ([Cu(OH)] + -Z and Cu 2+ -2Z) in Cu-SSZ-13 and compare their reducibility in SCR.
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[Cu(OH)] + -Z and Cu 2+ -2Z can be further distinguished by NH 3 reduction temperatures, and their different reducibility in SCR is revealed. 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title Quasi- quantification of Cu() ions in Cu-SSZ-13 catalyst by an NH temperature-programmed reduction method
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