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A Self‐Sacrificing Dual‐Template Strategy to Heteroatom‐Enriched Porous Carbon Nanosheets with High Pyridinic‐N and Pyrrolic‐N Content for Oxygen Reduction Reaction and Sodium Storage
Author(s) -
Wang Shuguang,
Qin Jinwen,
Zheng Lirong,
Guo Donglei,
Cao Minhua
Publication year - 2018
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.201801149
Subject(s) - materials science , heteroatom , carbon fibers , chemical engineering , porosity , template method pattern , specific surface area , amorphous solid , anode , doping , redox , nanotechnology , inorganic chemistry , catalysis , electrode , organic chemistry , chemistry , ring (chemistry) , composite material , metallurgy , optoelectronics , composite number , engineering
Controllable synthesis of 2D carbon nanosheets with high heteroatom‐doping level, large specific surface area, and hierarchically pore structure is difficult and desired. In this work, a novel and simple self‐sacrificing in situ formed dual‐template strategy is first developed to synthesize N/S codoped hierarchically porous carbon nanosheets. The in‐situ formed g ‐C 3 N 4 and amorphous ZnO act as self‐sacrificing templates on account of their thermal decomposition and evaporation at higher temperature. The N/S codoped hierarchically porous carbon nanosheets simultaneously possess high heteroatom‐doping level (N: 10.51 wt%; S: 1.71 wt%), large specific surface area (904.63 m 2 g −1 ), and abundant hierarchically porous structure. Particularly, this material possesses a high content of pyridinic‐N and pyrrolic‐N configuration (65.66%). These unique structure advantages of N/S codoped hierarchically porous carbon nanosheets contribute to high oxygen reduction electrocatalytic activity in both basic and acidic environments. Additionally, as the anode material for sodium‐ion batteries, the material also displays a high reversible capacity of 270.1 mAh g −1 at a current density of 100 mA g −1 and high stability (160.1 mAh g −1 after 2000 cycles at 1000 mA g −1 with a capacity retention of 82.3%). These results indicate a great potential of the material in energy conversion and storage applications.