Modification of Nanodiamond and Its Application in Electrocatalytic Oxygen Reduction Reaction

Oxygen reduction reaction (ORR) is an important cathodic reaction, but its slow reaction kinetics seriously hinders the application of clean energy devices such as fuel cells and metal-air batteries.Although platinum (Pt)-based catalysts possess excellent ORR activity, their high cost, scarce reserves, poor stability and tolerance make it difficult to commercialize clean energy technologies based on Pt-based catalysts.To address the above problems, it is urgent to develop new types of catalysts.As an emerging carbon-based material, nanodiamond exhibits broad application prospects in ORR catalysis due to its advantages such as low cost, controllable functional group modification, high surface energy (>1000 mJ•m - 2 ), and unique π and σ bond configurations.This paper reviews the latest research progress of nanodiamond catalysts.Firstly, preparation methods such as detonation method, chemical vapor deposition method, pulsed laser ablation method, and high-temperature and high-pressure method are introduced.Subsequently, modification strategies including heteroatom doping, surface functionalization, material composite, and morphology regulation are summarized, and the formation mechanism of active centers and the regulation rules of reaction paths are analyzed, covering the influence of different modification strategies on catalytic performance and the comparison of relevant performance data.Finally, the challenges faced by current nanodiamond catalysts in catalytic mechanism, synthesis process, 第*期 韦连金, 等: 纳米金刚石改性及其在电催化氧还原反应中的应用 2 characterization technology, and design methods are discussed, and the future development directions are prospected, providing a reference for the research and development of new carbon-based ORR catalysts.