Modification of micro/nanoscaled manganese dioxide-based materials and their electrocatalytic applications toward oxygen evolution reaction

• Published in: Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2023-03, Vol.11 (13), p.6688-6746
• Main Authors: He, Gaihua, Liao, Ye
• Format: Article
• Language: English
• Subjects: Catalysis; Catalysts; Efficiency; Electrocatalysts; Evolution; Heterojunctions; Manganese; Manganese dioxide; Morphology; Nanomaterials; Nanotechnology; Oxygen; Oxygen evolution reactions
• ISSN: 2050-7488; 2050-7496
• DOI: 10.1039/d2ta09165h

Manganese dioxide (MnO 2 ) has been considered one of the most attractive materials for the oxygen evolution reaction (OER) due to its low cost, natural abundance, easy synthesis, multiple morphology and polymorph, environmental friendliness, and high potential theoretical catalytic performance. However, the unsatisfactory oxygen evolution reaction (OER) efficiency of MnO 2 -based materials has confined their practical applications. Fortunately, recently, enormous efforts have been invested to improve the oxygen evolution reaction efficiency and clarify underlying mechanisms. Here, the aim is to exhaustively summarize the recent advances in the application of manganese dioxide and its composites as electrocatalysts for the oxygen evolution reaction. Fundamentally, the mechanisms and correlatively critical parameters of OER catalysis are discussed. Moreover, the diverse preparation routes of MnO 2 nanomaterials are itemized elaborately. The morphology control, structure construction, facet engineering, element doping, and construction of binary/ternary heterojunctions are presented. Their applications in OER catalysis are also highlighted. Finally, a proposal for the research gaps and perspective on the challenges and development direction for future research on nanostructured MnO 2 -based materials in the field of OER catalysis applications has been propounded. Therefore, this review provides basic guidance for the rational design and construction of high-efficiency MnO 2 -based catalysts for OER. The MnO 2 OER electrocatalysts is modified by morphology control, structure construction, facet engineering, doping and heterojunctions, whose mechanisms and practical applications are summarized to develope efficient OER electrocatalysts.