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Updated: Oct 14, 2025
A Continuous-flow Photocatalytic Reactor for the Precisely Controlled Deposition of Metallic Nanoparticles
Published on: April 10, 2019
Ultrafine platinum nanoparticles confined in a covalent organic framework for enhanced enzyme-mimetic and
Li Zhang1, Chaoqin Han1, Pu Zhang2
1Chongqing Key Laboratory of Green Synthesis and Applications, College of Chemistry, Chongqing Normal University, Chongqing 401331, P. R. China. ywang@cqnu.edu.cn.
Abstract:
Uniformly dispersed ultrafine platinum nanoparticles confined in a covalent organic framework (Pt/COF) have been designed and synthesized, which exhibit good catalytic activities in both enzyme-like and electrocatalytic catalysis. Benefiting from the space-confinement effect of pores in the COF matrix, the size of in situ grown Pt nanoparticles is as small as 2.44 nm with a narrow size distribution. Owing to the structure superiority, the Pt/COF catalyst exhibits much better peroxidase/oxidase-like activity than unsupported Pt nanoparticles and a physical mixture of the two components. Based on the inhibition of catalytic oxidation of the peroxidase substrate by Pt/COF, a sensitive colorimetric method is established for tannic acid sensing. Furthermore, the Pt/COF catalyst also exhibits better electrocatalytic activity and stability than commercial Pt/C catalyst towards the methanol oxidation reaction (MOR). This work demonstrates the promising application potential of COF-supported materials in both enzyme-mimetic and electrocatalytic catalysis.
