Metal oxide catalyst membrane electrodes for the determination of hydrogen peroxide

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Abstract
The use of metal oxides as catalysts in electrochemical sensors for hydrogen peroxide is reported. Membrane-immobilised and entrapped catalysts were used with a Yellow Springs Instruments Model 5739 oxygen electrode. The electrodes were studied at high pH in the dip-type mode. The most sensitive electrode using manganese(IV) oxide had a detection limit of –6 M hydrogen peroxide and did not suffer interference from many components commonly found in industrial waste samples. The manganese(IV) oxide catalyst electrode was adapted as a flow injection technique and showed good responses during continuous use.

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