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- W2565808239 abstract "Proton transport is an elementary process in the selective catalytic reduction of nitrogen oxides by ammonia (DeNOx by NH3-SCR) using metal-exchanged zeolites as catalysts. This review summarizes recent advancements in the study of proton transport in zeolite catalysts using in situ electrical impedance spectroscopy (IS) under NH3-SCR reaction conditions. Different factors, such as the metal cation type, metal exchange level, zeolite framework type, or formation of intermediates, were found to influence the proton transport properties of zeolite NH3-SCR catalysts. A combination of IS with diffuse reflection infrared Fourier transformation spectroscopy in situ (in situ IS-DRIFTS) allowed to achieve a molecular understanding of the proton transport processes. Several mechanistic aspects, such as the NH3-zeolite interaction, NO-zeolite interaction in the presence of adsorbed NH3, or formation of NH4+ intermediates, have been revealed. These achievements indicate that IS-based in situ methods as complementary tools for conventional techniques (e.g., in situ X-ray absorption spectroscopy) are able to provide new perspectives for the understanding of NH3-SCR on zeolite catalysts." @default.
- W2565808239 created "2017-01-06" @default.
- W2565808239 creator A5027924615 @default.
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- W2565808239 date "2016-12-14" @default.
- W2565808239 modified "2023-09-30" @default.
- W2565808239 title "In Situ Spectroscopic Studies of Proton Transport in Zeolite Catalysts for NH3-SCR" @default.
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- W2565808239 doi "https://doi.org/10.3390/catal6120204" @default.
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