In this paper, a novel catalyst, titanate nanotube (TNT) confined CeO 2 was designed and synthesized. Such catalyst showed a remarkable resistance to alkali metal poisoning in deNO x application. The catalyst effectively shielded the main active phase, CeO 2, from the poisons with the tubular channel of H 2 Ti 12 O 25 . Furthermore, the poisons (e.g., Na + ) could also be stabilized in the interlayer of H 2 Ti 12 O 25 through ion exchange. This catalyst developed herein gives a new sight for the design of “shell protection” catalysts to improve their tolerance to poisons.
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Chen et al. (2011) studied this question.
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