Rare Co/Fe-MOFs exhibiting high catalytic activity in electrochemical aptasensors for ultrasensitive detection of ochratoxin A

Here we report a surprising discovery that Co/Fe-MOFs possess intrinsic electrocatalytic activities for thionine. The catalytic abilities of MOFs depend strongly on their μ3-O linked trigonal prism structures. Using NH2-Co-MOF as an example, the high-performance of electrocatalysis towards thionine for ultrasensitive electrochemical detection of ochratoxin A is first established.