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• W3201526118 endingPage "12629" @default.
• W3201526118 startingPage "12619" @default.
• W3201526118 abstract "Phosphorus (P) stemming from biodiesel and/or lubricant oil additives is unavoidable in real diesel exhausts and deactivates gradually the Cu-SSZ-13 zeolite catalyst for ammonia-assisted selective catalytic NOx reduction (NH3-SCR). Here, the deactivation mechanism of Cu-SSZ-13 by P-poisoning was investigated by ex situ examination of the structural changes and by in situ probing the dynamics and redox of Cu active sites via a combination of impedance spectroscopy, diffuse reflection infrared Fourier transform spectroscopy, and ultraviolet-visible spectroscopy. We unveiled that strong interactions between Cu and P led to not only a loss of Cu active sites for catalytic turnovers but also a restricted dynamic motion of Cu species during low-temperature NH3-SCR catalysis. Furthermore, the CuII ↔ CuI redox cycling of Cu sites, especially the CuI → CuII reoxidation half-cycle, was significantly inhibited, which can be attributed to the restricted Cu motion by P-poisoning disabling the formation of key dimeric Cu intermediates. As a result, the NH3-SCR activity at low temperatures (200 °C and below) decreased slightly for the mildly poisoned Cu-SSZ-13 and considerably for the severely poisoned Cu-SSZ-13." @default.
• W3201526118 created "2021-09-27" @default.
• W3201526118 creator A5003031510 @default.
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• W3201526118 date "2021-09-12" @default.
• W3201526118 modified "2023-10-13" @default.
• W3201526118 title "Inhibition Effect of Phosphorus Poisoning on the Dynamics and Redox of Cu Active Sites in a Cu-SSZ-13 NH₃-SCR Catalyst for NO<i>_x</i> Reduction" @default.
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• W3201526118 doi "https://doi.org/10.1021/acs.est.1c03630" @default.
• W3201526118 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/34510889" @default.
• W3201526118 hasPublicationYear "2021" @default.
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