In:
Angewandte Chemie, Wiley, Vol. 134, No. 14 ( 2022-03-28)
Abstract:
Here, we report a universal single‐atom coating (SAC) strategy by taking advantage of the rich chemistry of tannic acid (TA). TA units not only self‐assemble into a cross‐linked porous polyphenolic framework, but also can grip on different substates via multiple binding modes. Benefiting from the diverse chelating ability of TA, a series of mono‐, and bi‐metallic SACs can be formed on substrates of different materials (e. g., carbon, SiO 2 , TiO 2 , MoS 2 ), dimensions (0D–3D) and sizes (50 nm–5 cm). By contrast, uniform SAC cannot be achieved using common approaches such as pyrolysis of metal–dopamine complexes or metal–organic frameworks. As a proof‐of‐concept demonstration, two Co SACs immobilized on graphene and TiO 2 were prepared. The former one shows six‐fold higher mass activity than Pt/C toward oxygen reduction. The latter one displays outstanding photocatalytic activity owing to the high activity of the single atoms and the formation of the single‐atom coating–TiO 2 heterojunction.
Type of Medium:
Online Resource
ISSN:
0044-8249
,
1521-3757
DOI:
10.1002/ange.v134.14
DOI:
10.1002/ange.202200465
Language:
English
Publisher:
Wiley
Publication Date:
2022
detail.hit.zdb_id:
506609-8
detail.hit.zdb_id:
1479266-7