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IR spectroscopy reveals the adsorbate-induced mobility of Cu(I) cations in Cu-ZSM-5. (a) IR spectrum in the ν(CO) of a Cu-ZSM-5 preactivated in NH3 at 500 °C, that of the same sample in the presence of CO at the maximum coverage, and that after prolonged outgassing at room temperature region. (b) The same as in (a) in the [SiO4] vibrational region. Data reproduced with permission from ref (201). Copyright 2018 American Chemical Society.
