Abstract
Manganese oxide (MnO2) catalysts are used for such as CO oxidation, but the mechanism of CO oxidation is unclear. In this study, α-MnO2 catalysts named rod-like, tube-like, needle-like, and wire-like morphologies were investigated for CO oxidation. The experimental results showed that rod-like α-MnO2 catalyst had the best CO oxidation performance due to more T-type oxygen (M = O) on its surface, which played an important role in CO oxidation. M = O easily adsorbed CO and formed monodentate carbonate, which was easily gasified to gaseous CO2 and T-type oxygen vacancies (M2+=□2–) at low temperature. However, wire-like α-MnO2 catalyst with less M = O tend to form bidentate carbonate at adsorbed O2, where bidentate carbonate was difficult gasified to gaseous CO2. These results indicated that Mn-based catalysts with more T-type oxygens facilitate CO oxidation at lower temperatures.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
