Manganese oxide is one of the most extensively studied electrocatalysts for oxygen reduction reaction (ORR) due to its high abundance and environmental friendliness. In this work, cerium ion intercalated birnessite-type manganese oxide (δ-MnO₂) dispersed on carbon (CeMnO₂/C) with high-efficient oxygen reduction reaction(ORR) electrocatalytic ability in alkaline media is prepared via facile aqueous reactions for the first time. The as-prepared catalyst shows morphology like quasi special nanospheres intertwined by plenty of nanorods just like knitting wool balls. Compared with MnO₂/C, the onset and half-wave potential of 4.8% CeMnO₂/C shift positively 27 and 57 mV, respectively, and are close to those of Pt/C. The oxygen reduction reaction occurring on 4.8% CeMnO₂/C undergoes a 4-electron transfer pathway with the HO₂⁻ yield lee than 2%, which is much lower than that produced on Pt/C. The CeMnO₂/C catalyst also exhibits excellent long-term stability with current retention of 96.4% after aging for 40000 s. The aluminum-air battery applying 4.8% CeMnO₂/C as cathode catalyst gives out the peak power density of 348.8 mW cm⁻² in 4 M KOH aqueous solution. After more than 300-h discharging, the voltage degradation of 4.8% CeMnO₂/C is only 2% per 100 h. In all, the excellent performance of the Ce-intercalated MnO₂/C demonstrates its enormous potential as ORR catalyst in metal-air batteries.

氧化锰由于其高丰度和环境友好性，是用于氧还原反应（ORR）的最广泛研究的电催化剂之一。在这项工作中，铈离子插层水钠锰矿型氧化锰（δ-的MnO ₂）分散在碳（铈的MnO ₂ / C）具有高效率的氧还原反应（ORR）在碱性介质中的电催化能力经由用于容易水溶液反应制备第一次。所制备的催化剂显示出类似准特殊纳米球的形态，这些特殊纳米球被许多纳米棒缠结在一起，就像编织羊毛球一样。与MnO ₂ / C相比，4.8％Ce MnO _2的产生和半波电势/ C分别正向偏移27和57 mV，并且接近Pt / C。上4.8％的Ce存在的氧还原反应的MnO ₂ / C经受与HO 4的电子转移通路₂ ^-产率超过2％利，这是更比在Pt / C产生的降低。Ce MnO ₂ / C催化剂还表现出出色的长期稳定性，老化40000 s后的电流保持率为96.4％。使用4.8％Ce MnO ₂ / C作为阴极催化剂的铝空气电池在4 M KOH水溶液中的峰值功率密度为348.8 mW cm ^-2。放电超过300小时后，电压下降了4.8％Ce MnO ₂每100小时C仅为2％。总之，Ce插入的MnO ₂ / C的优异性能证明了其在金属空气电池中作为ORR催化剂的巨大潜力。