Introduction
Bimonthly, started in 1957
Administrator
Shanxi Provincial Education Department
Sponsor
Taiyuan University of Technology
Publisher
Ed. Office of Journal of TYUT
Editor-in-Chief
SUN Hongbin
ISSN: 1007-9432
CN: 14-1220/N
Administrator
Shanxi Provincial Education Department
Sponsor
Taiyuan University of Technology
Publisher
Ed. Office of Journal of TYUT
Editor-in-Chief
SUN Hongbin
ISSN: 1007-9432
CN: 14-1220/N
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Synthesis and Electrocatalytic Oxygen Evolution Performances of CoP/Co@NPC Composites Derived from Z
DOI:
10.16355/j.cnki.issn1007-9432tyut.2020.04.011
Received:
Accepted:
abstract:
ZIF-67 nanocrystals were synthesized by hydrothermal method in benzyl alcohol system, and used as precursor templates to obtain nitrogen-doped metallic cobalt-based porous carbon materials(Co@NPC-X(X=700, 800, 900)) through heat treatment at different temperatures. CoP/Co@NPC-350 composites were obtained by further phosphating Co@NPC-800. The morphology, crystal structure, specific surface area and pore size distribution of the samples were characterized by scanning electron microscopy(SEM), transmission electron microscopy(TEM), X-ray diffraction(XRD) and nitrogen isothermal adsorption and desorption. Linear scanning voltammetry(LSV), electrochemical impedance spectroscopy(EIS), and chronopotentiometry were used to study the electrocatalytic performance and stability of the oxygen evolution reaction(OER) of the samples. The results show that the electrocatalytic performance of oxygen evolution reaction(OER) of the phosphated CoP/Co@NPC-350 was greatly improved compared with Co@NPC-800 before phosphating, even comparable to the precious metal electrocatalyst RuO2. The phosphated CoP/Co@NPC-350 exhibited a low overpotential of 281 mV at 10 mA/cm2 current density and good stability.
Keywords:
hydrothermal method; ZIF-67; phosphating; oxygen evolution reaction;