| 发表刊物： | Angew Chem Int Ed Engl |
| 摘要： | The applications of the most promising Fe—N–C catalysts are prohibited by their limited intrinsic activities. Manipulating the Fe energy level through anchoring electron- withdrawing ligands is found effective in boosting the catalytic performance. However, such regulation remains elusive as the ligands are only uncontrollably introduced oweing to their energetically unstable nature. Herein, we report a rational manipulation strategy for introducing axial bonded O to the Fe sites, attained through hexa-coordinating Fe with oxygen functional groups in the precursor. Moreover, the O modifier is stabilized by forming the Fe @ O @ Fe bridge bond, with the approximation of two FeN 4 sites. The energy level modulation thus created confers the sites with an intrinsic activity that is over 10 times higher than that of the normal FeN 4 site. Our finding opens a novel strategy to manage coordination environments at an atomic level for high activity ORR catalysts. |
| 论文类型： | 期刊论文 |
| 卷号： | 59 |
| 页面范围： | 13923–13928 |
| 是否译文： | 否 |
| 发表时间： | 2020-12-05 |
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