| Compounds such as transition metal oxides and phosphides are catalysts with good electrocatalysis properties,and are widely used in new energy fields such as fuel cells and electrocatalytic water spilting.In this paper,by using ZIF-67 as a template prepared CeOx modified CoP@C nanocomposites and nitrogen-doped graphitized porous carbon fiber/cobalt-based nanocomposites.And characterized by XRD,SEM,TEM,etc.Finally,the electrochemical properties were tested by testing cyclic voltammetry and polarization curves.Using a low-temperature phosphating method,ZIF-67 as a precursor and sodium hypophosphite as a phosphorus source,a series of CeOx modified CoP@C nanocomposites were prepared by changing the ratio of Ce and Co,and they were studied for electrocatalytic water spiliting.The electrocatalytic performance of the electrolyzed electrocatalyst CeOx modified CoP@C nanocomposites increased first and then decreased with the CeOx content.When Ce/Co=1/9,the best electrocatalytic performance,electrochemical The test results show that the electrocatalytic hydrogen evolution and oxygen evolution overpotentials at 10 mA/cm~2 current density are 127 mV(vs.RHE)and313 mV(vs.RHE),respectively,and show up to 10 h.Cycle stability.ZIF-67 was spun into N-doped graphitized carbon nanofibers by electrospinning to construct a one-dimensional highly graphitized porous carbon fiber/cobalt-based nanocomposite.Then using CO2 and NH3 activating at different temperatures.After activation,a series of catalysts were obtained,and the characterization and electrocatalytic properties of these catalysts were tested.The electrochemical test results show that the CA-800 sample prepared by activation with CO2 gas at 800°C has better oxygen reduction catalytic performance,and the peak potential and half-peak potential of the catalytic oxygen reduction reach 0.95 V(vs.RHE),respectively.And 0.87 V(vs.RHE),while the electrocatalyst CA-800 has good long-term stability and resistance to methanol poisoning. |
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