Novel H2Ti12O25-Confined CeO2 Catalyst with Remarkable Resistance to Alkali Poisoning Based on the Shell Protection Effect

In this paper, a novel catalyst, titanate nanotube (TNT) confined CeO2 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, CeO2, from the poisons with the tubular channel of H2Ti12O25. Furthermore, the poisons (e.g., Na+) could also be stabilized in the interlayer of H2Ti12O25 through ion exchange. This catalyst developed herein gives a new sight for the design of shell protection catalysts to improve their tolerance to poisons.