In Situ Anchoring of Co Single Atoms within Keto-Enamine COFs via the Coordination of an Interlayer N Atom with Co for the Enhanced Photocatalytic CO₂ Reduction Efficiency

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: April 24, 2025

Single-atom catalysts (SACs) are prone to agglomeration or migration during catalytic processes, making the development of highly dispersible SACs greatly essential for performance photocatalytic CO2 reduction. Herein, cobalt-containing keto-enamine covalent organic frameworks (COFs) (Co/TpPa-1) successfully in situ synthesized by utilizing interlayer nitrogen atom coordinated with metallic cobalt, which is used effectively prevent monometallic atoms ensure homogeneous dispersion resulting metalized COFs. In reduction, Co/TpPa-1 composite exhibits significantly enhanced compared TpPa-1 The CO yield 0.05 mM approximately 414.5 μmol g-1 h-1, representing a two-order-of-magnitude improvement over COF catalyst (approximately 4.15 h-1). Moreover, shows 99.45% selectivity and good stability, maintaining 97% reduction rate after four cycles. reason lies fact that interaction between monatomic Co COFs enhances visible light absorption extends lifetime photogenerated carriers promoting electron transfer through loaded Co. This work provides new idea synthesis high selectivity.

Language: Английский

Efficient photocatalytic hydrogen production via single-atom Pt anchored hydrogen-bonded organic frameworks

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 679, P. 91 - 101

Published: Oct. 18, 2024

Language: Английский