NobleBlocks
    Electrochemically induced surface modifications of mesoporous spinels (Co<sub>3</sub>O<sub>4−δ</sub>, MnCo<sub>2</sub>O<sub>4−δ</sub>, NiCo<sub>2</sub>O<sub>4−δ</sub>) as the origin of the OER activity and stability in alkaline medium | NobleBlocks