Ultrafine Platinum Nanoparticles Confined in a Covalent Organic Framework for Enhanced Enzyme-mimetic and Electrocatalytic Performances

Abstract

Uniformly dispersed ultrafine platinum nanoparticles confined in a covalent organic framework (Pt/COF) has 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 illustrates much better peroxidase/oxidase-like activity than unsupported Pt nanoparticles and physical mixture of the two components. Based on the inhibition of catalytic oxidation of peroxidase substrate by Pt/COF, a sensitive colorimetric method is established for tannic acid sensing. Furthermore, Pt/COF also exhibits better electrocatalytic activity and stability than commercial Pt/C catalyst towards methanol oxidation reaction (MOR). This work demonstrates the promising application potential of COF-supported materials in both enzyme-mimetic and electrocatalytic catalysis.

Article information

Article type
Paper
Submitted
14 Aug 2021
Accepted
11 Oct 2021
First published
12 Oct 2021

Nanoscale, 2021, Accepted Manuscript

Ultrafine Platinum Nanoparticles Confined in a Covalent Organic Framework for Enhanced Enzyme-mimetic and Electrocatalytic Performances

L. Zhang, C. Han, P. Zhang, W. Fu, Y. Nie and Y. Wang, Nanoscale, 2021, Accepted Manuscript , DOI: 10.1039/D1NR05336A

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