Mass-Production of Mesoporous MnCo2O4 Spinels with Manganese(IV)- and Cobalt(II)-Rich Surfaces for Superior Bifunctional Oxygen Electrocatalysis
Mass-Production of Mesoporous MnCo2O4 Spinels with Manganese(IV)- and Cobalt(II)-Rich Surfaces for Superior Bifunctional Oxygen Electrocatalysis
复制标题
大规模生产具有富锰（IV）和钴（II）表面的介孔MnCo2O4尖晶石，用于卓越的双功能氧电催化
DOI：
10.1002/anie.201708765
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发表时间：
2017-11-20
影响因子：
16.6
通讯作者：
Geng, Baoyou
中科院分区：
文献类型：
--
作者：
Wang, Wenhai;Kuai, Long;Geng, Baoyou
制备了用于双功能氧电催化的介孔MnCo2O4电极材料。 MnCo2O4 在析氧反应 (OER) 方面表现出类似 Co3O4 的活性，在氧还原反应 (ORR) 方面表现出类似 Mn2O3 的性能。 MnCo2O4的ORR和OER之间的电位差低至0.83V。通过 XANES 和 XPS 研究，显着的活性源自优选的富含 Mn-IV 和 Co-II 的表面。通过在相对较低的温度下对成分进行精确的化学控制，可以大规模地获得电极材料。表面态工程可能为优化电极材料的电催化性能开辟一条新途径。突出的双功能活性表明 MnCo2O4 可用于金属-空气电池和/或其他能源设备。
A mesoporous MnCo2O4 electrode material is made for bifunctional oxygen electrocatalysis. The MnCo2O4 exhibits both Co3O4-like activity for oxygen evolution reaction (OER) and Mn2O3-like performance for oxygen reduction reaction (ORR). The potential difference between the ORR and OER of MnCo2O4 is as low as 0.83V. By XANES and XPS investigation, the notable activity results from the preferred Mn-IV- and Co-II-rich surface. The electrode material can be obtained on large-scale with the precise chemical control of the components at relatively low temperature. The surface state engineering may open a new avenue to optimize the electrocatalysis performance of electrode materials. The prominent bifunctional activity shows that MnCo2O4 could be used in metal-air batteries and/or other energy devices.