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• W3214935548 endingPage "111574" @default.
• W3214935548 startingPage "111574" @default.
• W3214935548 abstract "Au/CeO 2 -based materials are widely investigated catalytical systems used for the preferential oxidation of CO (PROX-CO). Recent research focused on their improvement via the development and optimization of nanostructures, where both metal and oxide may be individually tailored to provide the best combination of catalytic performance, stability, and cost. In this work, we synthesized CeO 2 porous nanorods using a facile hydrothermal synthesis and tailored their native porous structure using a simple acid lixiviation procedure to enlarge its pores and expose facets such as the {110} ones that are more susceptible to oxygen vacancy formation, one of the main requirements for PROX-CO. We decorated both lixiviated and as-synthesized CeO 2 nanorods with Au nanoparticles using deposition-precipitation, and evaluated the effect of lixiviation over the morphology, structure, oxygen storage capacity and catalytic activity for PROX-CO. Through HRSTEM we observed an increase in the pore size while maintaining the morphology and structure of the nanorods. This increase was accompanied by the facilitation of oxygen vacancy formation, resulting in almost tripling the oxygen storage capacity (OSC). This impacted the performance of the CeO 2 /Au nanorods for PROX-CO, allowing a maximum of 88% CO conversion rate at 181 °C, compared to 27% and 238 °C for the non-lixiviated nanorods, under the same catalytical conditions. • Low-cost, easy-to-purify acid lixiviation procedure to enlarge CeO 2 nanorod pores. • The enlargement exposes internal {110} facets, promoting oxygen vacancy formation. • The oxygen storage capacity (OSC) of the nanorods tripled after lixiviation. • Lixiviating CeO 2 /Au tripled CO conversion and lowered T max for PROX-CO to <200 °C. • AuNP hosted on CeO 2 nanorods did not undergo sintering after PROX-CO catalysis." @default.
• W3214935548 created "2021-12-06" @default.
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• W3214935548 date "2022-01-01" @default.
• W3214935548 modified "2023-10-14" @default.
• W3214935548 title "Improvement of PROX-CO catalytical performance by modulation of the pore structure of CeO2 nanorods decorated with Au nanoparticles" @default.
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• W3214935548 doi "https://doi.org/10.1016/j.micromeso.2021.111574" @default.
• W3214935548 hasPublicationYear "2022" @default.
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