摘要
Porous single crystals have the characteristics of long-range ordering structure and large specific surface area,which will significantly enhance their electrochemical performance.Here,we report a method different from the conventional porous single crystal growth method.This method is to directly convert single crystal precursors Co_(3)O_(4) and Fe_(3)O_(4) into Co_(2)N and Fe_(2)N,and then further reduces them to porous single crystals Co and Fe particles under H2/Ar atmosphere.The removal of O^(2–)in the lattice channel at the pressure of 25~300 torr and the temperature of 300~600℃ will promote nitridation of the single-crystalline Co–O and Fe–O frames,and further remove N^(3–)in H2/Ar atmosphere and recrystallize as Co and Fe.These porous single crystals exhibit enhanced electrochemical properties due to their structural coherence and highly active surface.We demonstrated that the aminobenzene yield was up to 91%and the selectivity reached 92%in the electrochemical reduction of nitrobenzene.
作者
ZHANG Fei-Yan
XIE Kui
张飞燕;谢奎(College of Chemistry and Materials Science,Fujian Normal University,Fuzhou 350007,China;Key Laboratory of Design&Assembly of Functional Nanostructures,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China)
基金
supported by the Natural Science Foundation of China(91845202,21750110433)
Dalian National Laboratory for Clean Energy(DNL180404)
Strategic Priority Research Program of Chinese Academy of Sciences(XDB2000000)。
