Surface pits stabilized Au catalyst for low-temperature CO oxidation

Development of active and stable catalysts for low-temperature CO oxidation has long been regarded as a hot topic. In this contribution, we used CeO2 with high-density surface pits as support to prepare an active and stable Au/CeO2 catalyst by an adsorption-deposition method. The obtained 0.05 wt% Au/CeO2-TD (where TD represents thermal decomposition) can maintain its activity at 80 degrees C for more than 20 h or even after calcination at 800 degrees C for 2 h. The characterization results showed that the high-density surface pits on CeO2-TD play a decisive role in the stabilization of Au and enhancement of the redox property. This work may provide a new strategy to improve the stability of supported metal catalysts by a simple and conventional method.

Automated summary

In this study, an active and stable Au/CeO2 catalyst was prepared using CeO2 with high-density surface pits as the support. The catalyst showed long-term activity at low temperatures and remained stable even after high-temperature calcination. This research may provide a new method to improve the stability of supported metal catalysts.