Abstract
Manganese dioxides have been recognized as one of the most attractive candidates for water splitting due to their unique properties of low cost, environmental friendliness, multiple morphologies and polymorphs. However, further applications of MnO2-based materials have been limited since their oxygen evolution reaction (OER) efficiency is still not quite ideal. This, this review summarizes recent research advances in manganese dioxide-based composites for oxygen evolution reactions. The morphological control, structure construction, defect engineering, atom doping, and binary/ternary heterojunctions have been performed to enhance their OER catalytic activity. Finally, the gaps in the research of MnO2-based materials in the field of OER catalysis are presented and the challenges and development directions for future research are outlined. Therefore, this may provide a guideline for the rational design and construction of efficient MnO2-based catalytic OER in the future.
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