Single-Fe-Atom Catalyst for Sensitive Electrochemical Detection of Caffeic Acid

Xiumin Yang; Sijia Lv; Liyong Gan; Chun Wang; Zhi Wang; Zhonghai Zhang

doi:10.1021/acsami.3c11378

Single-Fe-Atom Catalyst for Sensitive Electrochemical Detection of Caffeic Acid

ACS Appl Mater Interfaces. 2023 Nov 22;15(46):53189-53197. doi: 10.1021/acsami.3c11378. Epub 2023 Nov 9.

Authors

Xiumin Yang¹, Sijia Lv¹, Liyong Gan², Chun Wang¹, Zhi Wang¹, Zhonghai Zhang³

Affiliations

¹ Department of Chemistry, College of Science, Hebei Agricultural University, Baoding 071001, China.
² Institute for Structure and Function and Department of Physics, Chongqing University, Chongqing 400030, China.
³ School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China.

PMID: 37946326
DOI: 10.1021/acsami.3c11378

Abstract

A single-atom catalyst (Fe SAs/-N-C) with excellent stability and conductivity was strategically fabricated via high-temperature calcination using the NiFe layered double hydroxide (LDH)/ZIF-8 composite as precursors. With the help of Ni as a catalyst, a great number of carbon nanotubes were produced whereby the isolated carbon bulks were interconnected to form an "island-bridge"-like 3D network structure, which greatly enhanced the exposure of active sites and the electron transfer. Accordingly, caffeic acid (CA) with versatile biological and pharmacological activities was chosen as the model analyte. The Fe SAs/-N-C with Fe-N₄ as the catalytic active site was employed to establish the electrochemical sensing of CA with satisfactory sensitivity, selectivity, and long-term stability. This work expands the application range of single-atom catalysts and contributes a significant reference for the synthesis of hybrid double-atom catalysts.

Keywords: ZIF-8; caffeic acid; electrochemical senor; single-atom catalysts.