biostudies-literatureUnknown12(40)Zhang RThe oxygen species of CeO₂ nanocatalysts plays a key role in the CO oxidation. In this work, nanocrystalline CeO₂ with infrared spectroscopy detectable surface superoxide (O₂ ^-) species at room temperature is fabricated and CO oxidation is used as a probe reaction for the exploration of the characteristics of surface O₂ ^- species on the CeO₂ surface. We discover that the surface O₂ ^- species have ignorable influences on the overall reaction rate of CO oxidation on pure ceria by comparing P-CeO₂ (CeO₂ prepared by precipitation method) with HT-CeO₂ (CeO₂ prepared by hydrothermal method). It is concluded that the reaction between CO molecules and surfaRSC advances26238-26244https://www.ebi.ac.uk/biostudies/studies/S-EPMC9477017biostudies-literatureProbing the role of surface activated oxygen species of CeO₂ nanocatalyst during the redox cycle in CO oxidation.PMC9477017Liu XYang XLi JLiang HYe WLiu BWang XZhang RfalseProbing the role of surface activated oxygen species of CeO₂ nanocatalyst during the redox cycle in CO oxidation.The oxygen species of CeO₂ nanocatalysts plays a key role in the CO oxidation. In this work, nanocrystalline CeO₂ with infrared spectroscopy detectable surface superoxide (O₂ ^-) species at room temperature is fabricated and CO oxidation is used as a probe reaction for the exploration of the characteristics of surface O₂ ^- species on the CeO₂ surface. We discover that the surface O₂ ^- species have ignorable influences on the overall reaction rate of CO oxidation on pure ceria by comparing P-CeO₂ (CeO₂ prepared by precipitation method) with HT-CeO₂ (CeO₂ prepared by hydrothermal method). It is concluded that the reaction between CO molecules and surfa2022-01-01T00:00:00Z2022 Sep2025-04-26T00:55:58.69Z2025-04-06T09:54:08.605ZS-EPMC94770173627510910.1039/d2ra03533b