In:
Angewandte Chemie, Wiley, Vol. 133, No. 32 ( 2021-08-02), p. 17570-17574
Abstract:
Over the past decades, despite the substantial efforts that have been devoted to the modifications of Pt nanoparticles (NPs) to tailor their selectivities for hydrogenation reactions, there are still a lack of facile strategies for precisely regulation of the surface properties of NPs, especially for those with small sizes. In this work, we propose a top‐down thermal annealing strategy for tuning the surface properties of Pt‐based NPs (≈4 nm) without the occurrence of aggregation. Compared to conventional bottom‐up methods, the present top‐down strategy can precisely regulate the surface compositions of Pt‐Cd NPs and other ternary Pt‐Cd‐M NPs (M=Fe, Ni, Co, Mn, and Sn). The optimized Pt‐Cd NPs exhibit excellent selectivity toward phenylacetylene and 4‐nitrostyrene hydrogenations with a styrene selectivity and 4‐aminophenyl styrene selectivity of 95.2 % and 94.5 %, respectively. This work provides a general strategy for the surface reconstructions of Pt‐based NPs, and promotes fundamental research on catalyst design for heterogeneous catalysis.
Type of Medium:
Online Resource
ISSN:
0044-8249
,
1521-3757
DOI:
10.1002/ange.v133.32
DOI:
10.1002/ange.202106459
Language:
English
Publisher:
Wiley
Publication Date:
2021
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