催化作用
电催化剂
碳纤维
电池(电)
电化学
吡啶
材料科学
氮气
无机化学
贵金属
金属
化学
化学工程
电极
有机化学
物理化学
复合材料
冶金
功率(物理)
复合数
量子力学
工程类
物理
作者
Qing Lv,Ning Wang,Wenyan Si,Zhufeng Hou,Xiaodong Li,Xin Wang,Fuhua Zhao,Ze Yang,Yanliang Zhang,Changshui Huang
标识
DOI:10.1016/j.apcatb.2019.118234
摘要
Rational design a metal-free catalyst with well-defined structure as alternative of noble metal is highly desirable but challenging to catalyze oxygen reaction for metal–air batteries. In this report, nitrogen with a specific configuration is selectively doped into the carbon skeleton to prepare a graphdiyne-like carbon material, in which one carbon atom in every benzene ring of graphdiyne (GDY) is substituted by pyridinc N (PyN-GDY). Composed by pyridine ring and acetylenic linkers, the PyN-GDY is prepared through a bottom-up strategy using pentaethynylpyridine as the monomer. The as-synthesized PyN-GDY with “defined” molecular structure is an ideal model for addressing the intrinsic activity of active sites at molecular level. It exhibits excellent performance in both alkaline and acidic media as electrochemical catalyst for oxygen reduction reaction (ORR). The PyN-GDY-based Zn-air battery is demonstrated more active and stable than commercial Pt/C-based battery. Density functional theory calculations are used to analyze and determine the possible active sites of PyN-GDY in ORR. The precise construction of specific nitrogen doped carbon material is an effective method to produce efficient catalysts for electrocatalysis.
科研通智能强力驱动
Strongly Powered by AbleSci AI