Journal
ADVANCED MATERIALS
Volume 33, Issue 52, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202105904
Keywords
2; 5-diformylfuran; carbon nitride; charge transfer dynamics; dual atomic sites; single atom catalyst
Categories
Funding
- National Natural Science Foundation of China [21971002]
- Natural Science Foundation of Anhui Province [1908085QB45]
- Science and Technology Key Project of Guangdong Province of China [2020B010188002]
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The efficient separation of photo-generated electrons and holes is achieved by utilizing a dual atomic sites strategy on polymeric carbon nitride, which significantly enhances photocatalytic performance. This study provides a new perspective for the rational design of high performance photocatalysts at atomic level.
The separation efficiency of photo-generated carriers is still a great challenge that restricts the practical application of photocatalytic technology. The design of spatial separation path for photo-generated carriers at atomic level provides an innovative approach to address this challenge. Herein, a facile dual atomic sites strategy, consisting of Cu-N-4 and C-S-C active moieties decorated on polymeric carbon nitride (Cu SAs/p-CNS) is reported to simultaneously achieve the highly efficient separation of photo-generated electrons and holes for boosting photocatalytic performance. As a proof of concept, the Cu SAs/p-CNS is successfully applied to the photo-oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-diformylfuran (DFF), which exhibits 77.1% HMF conversion and 85.6% DFF selectivity under visible light irradiation. The activity is considerably higher than that of bulk p-CN, S doped p-CN, and p-CN supported Cu single atom catalysts. Theoretical calculations and experimental results suggest that, during photocatalytic reaction, the isolated Cu-N-4 sites directly capture photo-generated electrons, while the surrounding S atoms bear photo-generated holes, which synergistically facilitates the separation of photo-generated carriers and thus results in enhanced photocatalytic activity. This study provides a new perspective for the rational design of high performance photocatalysts at atomic level.
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