Co–N/C-900 metal–organic framework-derived nanozyme as a H2O2-free oxidase mimic for the colorimetric sensing of l-cysteine

A facile and efficient colorimetric method with a Co–N/C nanozyme derived from a MOF precursor (Co–Zn ZIFs) was used to sensitively determine l -cysteine without adding H 2 O 2 .