Deng, X.; Rin, R.; Tseng, J.-C.; Weidenthaler, C.; Apfel, U.-P.; Tüysüz, H. Monodispersed Mesoporous Silica Spheres Supported Co₃O₄ as Robust Catalyst for Oxygen Evolution Reaction. ChemCatChem 2017, 9, 4238–4243.