Abstract
Summary A versatile electrode holder manufactured from Teflon and Kel “F” is described. The voltammograms of Pt, Pd, Rh, Ir and Au are compared in sulphuric acid for concentrations of 1–7.5 M. Secondary peaks in the hydrogen region of Rh in strong acid solution are presented as evidence for the existence of more than one type of hydrogen adsorbed under severe conditions on the metal. The difference between the effect of anion adsorption (Cl− and SO42−) and strong sulphuric acid on the shapes of the voltammograms is demonstrated. Attention is drawn to the differences between progressive changes in the oxide and hydrogen regions on the different metals, and the metals themselves.
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