ИСТИНА

This lecture presents a brief review of transformations which various manganese oxides undergo under operation in electrochemical environment as well as a number of original data on pure birnessite behavior under the same conditions. Birnessite electrodeposited from Mn2+ (anodic crystallization) and from MnO4- (cathodic crystallization) is considered as the binder-free reference material which behavior is not complicated by the presence of carbon. The role of morphological features controlled by means of deposition potential is also addressed.