Effect of the valence state of Mn in MnO _x /Ti₄O₇ composites on the catalytic performance for oxygen reduction reaction and oxygen evolution reaction.

ABSTRACT: Manganese oxide composites with mixed valence states were prepared through the hydrothermal method by compositing with Ti₄O₇ and calcining at different temperatures, and their ORR and OER catalytic performance were investigated. The prepared catalysts were characterized by XRD, SEM-EDS, HRTEM-EDS, and XPS methods to analyse their phase constitution, morphology feature, and surface composition. The major phase of manganese oxides was Mn₃O₄, which is a one-dimensional structure, and its growth was induced by Ti₄O₇. The ORR and OER catalytic activity can be enhanced due to the preferred orientation of manganese oxides. Electrochemical measurements, namely CV, LSV and EIS, were utilized for determining the ORR and OER catalytic

SUBMITTER: Bai F 

PROVIDER: S-EPMC8693610 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature