In:
Proceedings of the National Academy of Sciences, Proceedings of the National Academy of Sciences, Vol. 120, No. 15 ( 2023-04-11)
Abstract:
The performance optimization of isolated atomically dispersed metal active sites is critical but challenging. Here, TiO 2 @Fe species-N-C catalysts with Fe atomic clusters (ACs) and satellite Fe-N 4 active sites were fabricated to initiate peroxymonosulfate (PMS) oxidation reaction. The AC-induced charge redistribution of single atoms (SAs) was verified, thus strengthening the interaction between SAs and PMS. In detail, the incorporation of ACs optimized the HSO 5 - oxidation and SO 5 ·− desorption steps, accelerating the reaction progress. As a result, the Vis/TiFeAS/PMS system rapidly eliminated 90.81% of 45 mg/L tetracycline (TC) in 10 min. The reaction process characterization suggested that PMS as an electron donor would transfer electron to Fe species in TiFeAS, generating 1 O 2 . Subsequently, the h VB + can induce the generation of electron-deficient Fe species, promoting the reaction circulation. This work provides a strategy to construct catalysts with multiple atom assembly–enabled composite active sites for high-efficiency PMS-based advanced oxidation processes (AOPs).
Type of Medium:
Online Resource
ISSN:
0027-8424
,
1091-6490
DOI:
10.1073/pnas.2300281120
Language:
English
Publisher:
Proceedings of the National Academy of Sciences
Publication Date:
2023
detail.hit.zdb_id:
209104-5
detail.hit.zdb_id:
1461794-8
SSG:
11
SSG:
12
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