biostudies-literatureZhang ZDOE | SC | Basic Energy Sciences (BES)DOE | Office of Energy Efficiency & Renewable Energy | Bioenergy Technologies OfficeDOE | SC | Basic Energy SciencesDOE | Office of Energy Efficiency & Renewable Energy | Bioenergy Technologies Office (BETO)2664https://www.ebi.ac.uk/biostudies/studies/S-EPMC10169862biostudies-literatureUnknown14(1)Single atoms of platinum group metals on CeO₂ represent a potential approach to lower precious metal requirements for automobile exhaust treatment catalysts. Here we show the dynamic evolution of two types of single-atom Pt (Pt₁) on CeO₂, i.e., adsorbed Pt₁ in Pt/CeO₂ and square planar Pt₁ in Pt_ATCeO₂, fabricated at 500 °C and by atom-trapping method at 800 °C, respectively. Adsorbed Pt₁ in Pt/CeO₂ is mobile with the in situ formation of few-atom Pt clusters during CO oxidation, contributing to high reactivity with near-zero reaction order in CO. In contrast, square planar Pt₁ in Pt_ATCeO₂ is strongly anchored to the support during CO oxidation leading to relatively low reactivity with a positive reaction order in CO. Reduction of both Pt/CeO₂ and Pt_ATCeO₂ in CO transforms Pt₁ to Pt nanoparticles. However, both catalysts retain the memory of their initial Pt₁ state after reoxidative treatments, which illustrates the importance of the initial single-atom structure in practical applications.Nature communicationsMemory-dictated dynamics of single-atom Pt on CeO₂ for CO oxidation.PMC10169862NADE-FG02-05ER15712Tian JLu YHong JHoffman ASDatye AKLi YZhang ZHuang WJiang DBare SRWang YYang SEngelhard MHfalseMemory-dictated dynamics of single-atom Pt on CeO₂ for CO oxidation.Single atoms of platinum group metals on CeO₂ represent a potential approach to lower precious metal requirements for automobile exhaust treatment catalysts. Here we show the dynamic evolution of two types of single-atom Pt (Pt₁) on CeO₂, i.e., adsorbed Pt₁ in Pt/CeO₂ and square planar Pt₁ in Pt_ATCeO₂, fabricated at 500 °C and by atom-trapping method at 800 °C, respectively. Adsorbed Pt₁ in Pt/CeO₂ is mobile with the in situ formation of few-atom Pt clusters during CO oxidation, contributing to high reactivity with near-zero reaction order in CO. In contrast, square planar Pt₁ in Pt_ATCeO₂ is strongly anchored to the support during CO oxidation leading to relatively low reactivity with a positive reaction order in CO. Reduction of both Pt/CeO₂ and Pt_ATCeO₂ in CO transforms Pt₁ to Pt nanoparticles. However, both catalysts retain the memory of their initial Pt₁ state after reoxidative treatments, which illustrates the importance of the initial single-atom structure in practical applications.2023-01-01T00:00:00Z2023 May2025-04-19T06:42:47.305Z2025-04-19T06:42:47.305ZS-EPMC101698623716089010.1038/s41467-023-37776-3