Voltammetric investigation of platinum oxides II. Effect of hydration on their reduction behavior

The reduction behavior of alpha platinum oxides on PtOx/Ti (fabricated by t hermal decomposition) and Pt/Ti (reduced from PtOx/Ti) was compared using l inear sweep voltammetry. The peak potential of alpha oxide reduction was fo und to shift to a less positive value with decreasing its hydration degree, which depended upon the lower potential limits and cycle number of cyclic voltammetry. Factors effecting the stability of various platinum oxides, in cluding alpha and beta types, were systematically discussed in this work. ( C) 2000 Elsevier Science Ltd. All rights reserved.