Hemin-Engineered UiO-66(Ce) as a Highly Active Nanozyme for Electrochemical Sensing of Hydrogen Peroxide and Hydrogen in Beverages
Abstract
A hemin (Hm)-engineered cerium-based metal–organic framework (MOF), UiO-66(Ce)@Hm, was prepared and used as a nanozyme for electrochemical sensing of hydrogen peroxide (H 2 O 2 ) and dissolved hydrogen (H 2 ) in beverages. UiO-66(Ce)@Hm showed enhanced electrocatalytic activity toward H 2 O 2 because of the synergistic catalytic effects of Hm and UiO-66(Ce). The resulting sensor enabled H 2 O 2 detection from 0.5 to 250 μM with a detection limit of 0.32 μM, and was successfully applied to milk analysis. In addition, dissolved H 2 in hydrogen-rich water (HRW) promoted the catalytic conversion of o-phenylenediamine/H 2 O 2 to electroactive 2,3-diaminophenazine, allowing H 2 determination from 45 to 900 μM with a detection limit of 26.2 μM. These results demonstrate the potential of UiO-66(Ce)@Hm for food safety monitoring and quality assessment of HRW beverages.
Fields of Study & Subjects
Advanced Nanomaterials in Catalysis
Electrochemical sensors and biosensors
Polyoxometalates: Synthesis and Applications
Publication details
- Journal / source
- Journal of Agricultural and Food Chemistry
- Publisher
- American Chemical Society (ACS)
- Volume
- 74
- Issue
- 15
- Pages
- 12514–12526
- Publication date
- 10 April 2026
- Language
- EN