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  Enabling high loading in single-atom catalysts on bare substrate with chemical scissors by saturating the anchoring sites

Li, A., Kan, E., Chen, S., Du, Z., Liu, X., Wang, T., et al. (2022). Enabling high loading in single-atom catalysts on bare substrate with chemical scissors by saturating the anchoring sites. Small, 18(19): 2200073. doi:10.1002/smll.202200073.

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 Creators:
Li, Ang, Author
Kan, Erjun, Author
Chen, Shuangming, Author
Du, Zhengwei, Author
Liu, Xuan, Author
Wang, Tongyu, Author
Zhu, Wenjin, Author
Huo, Hailing, Author
Ma, Jingjing, Author
Liu, Dong, Author
Song, Li, Author
Feng, Hao, Author
Antonietti, Markus1, Author              
Gong, Jinlong, Author
Affiliations:
1Markus Antonietti, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863321              

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Free keywords: carbon nitride; chemical scissors; CO2 reduction; photocatalysis; single-atom catalysis
 Abstract: Atomically dispersed metal catalysts often exhibit high catalytic performances, but the metal loading density must be kept low to avoid the formation of metal nanoparticles, making it difficult to improve the overall activity. Diverse strategies based on creating more anchoring sites (ASs) have been adopted to elevate the loading density. One problem of such traditional methods is that the single atoms always gather together before the saturation of all ASs. Here, a chemical scissors strategy is developed by selectively removing unwanted metallic materials after excessive loading. Different from traditional ways, the chemical scissors strategy places more emphasis on the accurate matching between the strength of etching agent and the bond energies of metal-metal/metal-substrate, thus enabling a higher loading up to 2.02 wt% even on bare substrate without any pre-treatment (the bare substrate without any pre-treatment generally only has a few ASs for single atom loading). It can be inferred that by combining with other traditional methods which can create more ASs, the loading could be further increased by saturating ASs. When used for CHOH generation via photocatalytic CO2 reduction, the as-made single-atom catalyst exhibits impressive catalytic activity of 597.8 ± 144.6 µmol h−1 g−1 and selectivity of 81.3 ± 3.8%.

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Language(s): eng - English
 Dates: 2022-03-082022
 Publication Status: Published in print
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 Rev. Type: -
 Identifiers: DOI: 10.1002/smll.202200073
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Title: Small
  Other : Small
Source Genre: Journal
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Publ. Info: Weinheim, Germany : Wiley-VCH
Pages: - Volume / Issue: 18 (19) Sequence Number: 2200073 Start / End Page: - Identifier: ISSN: 1613-6810