Nitrogen-Rich Precursors Assisted Synthesis Of Metal-Organic Framework-Derived Nanostructures As Bifunctional Catalysts For Electrochemical Sensing And Oxygen Reduction Reaction
JOURNAL OF THE ELECTROCHEMICAL SOCIETY(2021)
摘要
Exploring the structure and composition of catalysts to realize fast electron transfer in electrochemical reaction is a challenging part for the development of highly efficient electrocatalysts. Herein, nitrogen-doped carbon nanotube with encapsulated cobalt nanoparticles is synthesized via co-pyrolysis of zeolitic imidazolate framework and assisted nitrogen/carbon precursors with high N/C ratio. These precursor-dependent materials are served as catalysts for determination of hydrogen peroxide (H2O2) and oxygen reduction reaction (ORR). Electrochemical measurement results suggest a strong relationship between N-doped types and electrochemical performance. The as-proposed ZU catalyst (urea as N-rich precursor) exhibits optimal electrocatalytic performance towards ORR and H2O2 detection. Furthermore, ZU also can be a potential cathode candidate for direct borohydride fuel cell (DBFC).The synthesis strategy offers a new clue in constructing effective non-noble-metal catalysts for electrochemical applications.
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