Hematite as an Electrocatalytic Marker for the Study of Archaeological Ceramic Clay bodies: A VIMP and SECM Study**

The electrocatalytic effect exerted by hematite, a ubiquitous component of clay bodies, on the oxygen reduction reaction (ORR) and evolution (OER) can be used to acquire information archaeological ceramics. solid-state voltammetric response different hematite ochre specimens, accompanied SECM analysis in contact with 0.10 M HCl aqueous solution, is described. In air-saturated solutions, catalytic effects ORR OER are Fe(III)/Fe(II) Fe(IV)/Fe(III) redox reactions. Such processes conditioned variety factors, hydroxylation degree mineral surfaces being particularly influential, exhibit significant variations upon heating specimens between 300 900 °C. Voltammetric measurements carried out set samples Apulian red-figured pottery dated back within 5th 4th centuries BCE permit obtain site-characteristic profiles.