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• W4310258712 abstract "Metal nanoparticle (NP) sintering is a prime cause of catalyst degradation, limiting its economic lifetime and viability. To date, sintering phenomena are interrogated either at the bulk scale to probe averaged NP properties or at the level of individual NPs to visualize atomic motion. Yet, mesoscale strategies which bridge these worlds can chart NP populations at intermediate length scales but remain elusive due to characterization challenges. Here, a multi-pronged approach is developed to provide complementary information on Pt NP sintering covering multiple length scales. High-resolution scanning electron microscopy (HRSEM) and Monte Carlo simulation show that the size evolution of individual NPs depends on the number of coalescence events they undergo during their lifetime. In its turn, the probability of coalescence is strongly dependent on the NP's mesoscale environment, where local population heterogeneities generate NP-rich hotspots and NP-free zones during sintering. Surprisingly, advanced in situ synchrotron X-ray diffraction shows that not all NPs within the small NP sub-population are equally prone to sintering, depending on their crystallographic orientation on the support surface. The demonstrated approach shows that mesoscale heterogeneities in the NP population drive sintering and mitigation strategies demand their maximal elimination via advanced catalyst synthesis strategies." @default.
• W4310258712 created "2022-11-30" @default.
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• W4310258712 date "2022-11-29" @default.
• W4310258712 modified "2023-10-12" @default.
• W4310258712 title "Metal Nanocatalyst Sintering Interrogated at Complementary Length Scales" @default.
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• W4310258712 doi "https://doi.org/10.1002/smll.202205217" @default.
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• W4310258712 hasPublicationYear "2022" @default.
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