Sur la reactivite electrochimique et catalytique des bioxydes de manganese: Differenciation des groupes oh et des molecules d'eau de constitution

Abstract

The importance of OH groups in the electrochemical reactivity of manganese dioxides is well known. By a kinetic analysis of thermogravimetric curves of decomposition of γ-manganese dioxides, it is possible to evaluate separately the number of OH groups and the number of water molecules in such dioxides. The number of OH groups so evaluated is the total.It is also possible to determine the number of superficial OH groups, by a chemical method. For two specimens, 1·8 and 3·9% of the OH groups were superficial.