催化作用
Boosting(机器学习)
化学
氧气
氧原子
合理设计
组合化学
纳米技术
材料科学
立体化学
分子
有机化学
计算机科学
机器学习
作者
Liyuan Gong,Hao Zhang,Ying Wang,Ergui Luo,Kui Li,Liqin Gao,Yuemin Wang,Zhijian Wu,Jin Zhao,Junjie Ge,Zheng Jiang,Changpeng Liu,Wei Xing
标识
DOI:10.1002/anie.202004534
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 FeN4 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 FeN4 site. Our finding opens a novel strategy to manage coordination environments at an atomic level for high activity ORR catalysts.
科研通智能强力驱动
Strongly Powered by AbleSci AI