The present invention relates to the electrolytic splitting of water using a carbon-supported
manganese oxide (MnOx) composite. Specifically, the present electrolytic splitting of water is carried under neutral
electrolyte conditions with a high electrolytic activity, while using an
oxygen evolution reaction (OER)-
electrode comprising the present carbon-supported MnOx composite. Next, the present invention relates to a process for producing such a carbon-supported MnOx composite as well as to a composite obtainable by the present process for producing the same and to an OER-
electrode comprising the carbon-supported MnOx composite obtainable by the present process.