IMPROVING THE ELECTROCATALYTIC PERFORMANCE OF SUSTAINABLE CO/CARBON MATERIALS FOR THE OXYGEN EVOLUTION REACTION BY ULTRASOUND AND MICROWAVE ASSISTED SYNTHESIS Article Zuliani A., Cano M., Calsolaro F., Giner-Casares J.J., Rodríguez-Castellón E., Berlier G., Cravotto G., Martina K., Luque R., Puente Santiago A.R. Sustainable Energy and Fuels. Royal Society of Chemistry. Vol. 5. 2021. P. 720-731