Biochar as supporting material for heterogeneous Mn(II) catalysts: Efficient olefins epoxidation with H2O2 - Pierri, Leticia de; Gemenetzi, A; Mavrogiorgou, A; Regitano, Jussara Borges; Deligiannakis, Y; Louloudi, M (Molecular Catalysis, 2020)