In:
Angewandte Chemie, Wiley, Vol. 134, No. 49 ( 2022-12-05)
Abstract:
Identification of the roles of different active sites is vital for the rational design of catalysts. We present a cutting‐edge strategy to discern the contributions of different single‐atom gold species and nanoparticles in 1,3‐butadiene hydrogenation, through coupling of advanced spectroscopic techniques, electron microscopy‐based automated image analyses, and steady‐state and kinetic studies. While all the carbon‐hosted single gold atoms display negligible initial activity, the in situ‐evolved gold nanoparticles are highly active. Full metal‐species quantification is realized by combining electron‐microscopy‐based atom recognition statistics and deep‐learning‐driven nanoparticle segmentation algorithm, allowing the structure–activity correlations for the hybrid catalysts containing different Au architectures to be established. Surface exposure density of Au nanoparticles, as revealed by electron‐microscopy‐based statistics, is revealed as a new and reliable activity descriptor.
Type of Medium:
Online Resource
ISSN:
0044-8249
,
1521-3757
DOI:
10.1002/ange.v134.49
DOI:
10.1002/ange.202214166
Language:
English
Publisher:
Wiley
Publication Date:
2022
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505868-5
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506609-8
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514305-6
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505872-7
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1479266-7
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505867-3
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506259-7
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