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Combining IR spectroscopy of NO adsorption on copper exchanged molecular sieves with the chabazite structure, i.e. Cu-SAPO-34 and Cu-SSZ-13, and theoretical calculations, different types of copper species have been identified. On one hand, [Cu–OH]+ species can be accurately distinguished, characterized by a νNO frequency at 1788–1798 cm−1 depending on their location in the chabazite structure (6R...
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