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- W4285386051 abstract "Improving both the extent of metallic Co nanoparticle (Co NP) formation and their stability is necessary to ensure good catalytic performance, particularly for Fischer-Tropsch synthesis (FTS). Here, we observe how the presence of surface oxygen vacancies (Ovac) on TiO2 can readily reduce individual Co3O4 NPs directly into CoO/Co0 in the freshly prepared sample by using a combination of X-ray photoemission electron microscopy (X-PEEM) coupled with soft X-ray absorption spectroscopy. The Ovac are particularly good at reducing the edge of the NPs as opposed to their center, leading to smaller particles being more reduced than larger ones. We then show how further reduction (and Ovac consumption) is achieved during heating in H2/syngas (H2 + CO) and reveal that Ovac also prevents total reoxidation of Co NPs in syngas, particularly the smallest (∼8 nm) particles, thus maintaining the presence of metallic Co, potentially improving catalyst performance." @default.
- W4285386051 created "2022-07-14" @default.
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- W4285386051 date "2022-07-14" @default.
- W4285386051 modified "2023-10-13" @default.
- W4285386051 title "Resolving the Effect of Oxygen Vacancies on Co Nanostructures Using Soft XAS/X-PEEM" @default.
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- W4285386051 doi "https://doi.org/10.1021/acscatal.2c00611" @default.
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