Effects of the Si/Al atomic ratio on the activity of Cu-ZSM-5 catalysts for nitric oxide decomposition |
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Authors: | Giuliano Moretti |
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Affiliation: | (1) Centro di Studio del CNR SACSO , Dipartimento di Chimica, Università La Sapienza , Piazzale A. Moro 5, 00185 Rome, Italy |
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Abstract: | A review of literature data for nitric oxide decomposition over Cu-ZSM-5 catalysts leads us to conclude that the turnover frequency depends on the Si/Al atomic ratio in a way opposite to the trend suggested by Iwamoto and co-workers and considered correct by Shelef in a recent letter published in this Journal. In particular we show that the turnover frequency increases with the number of Al atoms per unit cell (i.e. decreasing the Si/Al atomic ratio). This result suggests that the most active sites for NO decomposition over Cu-ZSM-5 catalysts may contain two close copper ions. |
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Keywords: | NO decomposition Cu-ZSM-5 |
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