Study of Pt electrode dissolution in H2O2-containing H2SO4 solution using an electrochemical quartz crystal microbalance

► The drastic Pt electrode weight-loss is observed by EQCM in the presence of H2O2. ► The ICP data explain that the Pt weight-loss is caused by the Pt dissolution. ► The Pt dissolution accelerates with the increasing H2O2 concentration. ► H2O2 is a major factor contributing to the Pt dissolution.