In the developed catalyst, atomically dispersed O and N atoms coordinated Mn active sites are incorporated within the graphene frameworks, mimicking the structures of Mn-containing enzymes. Taking advantages of the conductive 3D graphene frameworks and the synergistic neighboring O-N atoms, the Mn active sites outperform the commercial Pt/C catalyst for the ORR and the zinc–air batteries under alkaline conditions. Theoretical calculations revealed the potential active sites to be Mn-N1O3, Mn-N2O2 and Mn-N3O1. The research opens new opportunities for the rational design of other nature-inspired single atom catalysts.
The research article entitled “O-, N-Atoms-Coordinated Mn Cofactors within a Graphene Framework as Bioinspired Oxygen Reduction Reaction Electrocatalysts” was published in Advanced Materials on May 28th with PhD candidate YANG Yang being the first-author and Profs. CHENG Qianwang and WANG Hui being the correspondents.
Field emission scanning electron microscopy of the catalyst (left) and the optimized Mn-N3O1 structure (potential active site) with ORR intermediate states O*, OH* and OOH* (right) / Images from YANG Yang
The research was supported by the National Natural Science, the Fundamental Research Funds for the Central Universities, the CAS/SAFEA International Partnership Program for Creative Research Teams and the Hefei Science Center CAS and a Most Grant.
(Written by XU Yunfei, edited by HUANG Danning,USTC News Center)
On May 11, the Nature Publishing Group released Nature Publishing Index 2010 China, remarking “a dramatic rise in the quality of research being published by China”. University of Science and Technology of China is ranked 3rd of TOP 10 Institutions in Index 2010 China.
This article came from News Center of USTC.