Abstract
? 2022 Elsevier B.V.For the first time, Fe3O4-based high-entropy spinel oxides are studied for the electrochemical production of hydrogen peroxide. Among those investigated substances, (Fe0.2Zn0.2Co0.2Ni0.2Cu0.2) Fe2O4 shows significantly enhanced 2e-ORR electrocatalytic property. The H2O2 selectivity is found to range from 69.48% to 85.78% under a wide potential window of 0.2 ~ 0.65 V with excellent durability up to 24 h. The improved performance is attributed to the high concentration of oxygen vacancies on the material surface and the multicomponent co-interaction in the high-entropy oxide. We believe this finding will broaden the application of high-entropy spinel oxide catalysts for viable electrochemical production of H2O2.
NSTL
Elsevier