Quasi-operando quantification of Cu(ii) ions in Cu-SSZ-13 catalyst by an NH3 temperature-programmed reduction method

Quasi-operando quantification of Cu(ii) ions in Cu-SSZ-13 catalyst by an NH3 temperature-programmed reduction method

A quasi-operando NH3 temperature-programmed reduction method (NH3-TPR), with N2: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 Cu2+-2Z can be further distinguished by NH3 reduction...

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Veröffentlicht in:Chemical communications (Cambridge, England) England), 2021-01, 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, Duan Weng
Format: Artikel
Sprache:eng
Schlagworte:
Ammonia
INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Reduction
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Zusammenfassung:A quasi-operando NH3 temperature-programmed reduction method (NH3-TPR), with N2: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 Cu2+-2Z can be further distinguished by NH3 reduction temperatures, and their different reducibility in SCR is revealed.
ISSN:1359-7345
1364-548X
DOI:10.1039/d0cc07346f