Magnetically disturbed activity of immobilized catalase on an electrode in hydrogen-peroxide buffer

A catalase-immobilized platinum black electrode was used to measure the catalytic decomposition of hydrogen peroxide by catalase. The superconducting current of an 8 T superconducting magnet was swept between 0 T and 8 T, and the catalase electrode's current was monitored continuously under a voltage-stabilized condition. The sensor's current changed in correspondence with the varying magnetic fields. During the magnetic field exposures, the electrode's current increased nearly 200%. The clear and reproducible increase in the electrode's current under magnetic fields indicated that the catalytic activity of catalase was disturbed under magnetic field exposure of up to 8 T and at a threshold between 1 to 2 T.