ZIF-8@ZIF-67/LDH高效核壳纳米复合物的制备及其电催化性能研究

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中图分类号：TQ221；TB31 文献标志码：A

Preparation and electrocatalytic performance of ZIF-8@ ZIF67/LDH high-efficiency core-shell nanocomposite

CHEN Ying （SchoolofMaterialsand Chemistry，UniversityofShanghaiforScience andTechnology，Shanghai 2o93，China）

Abstract： The ZIF-8@ZIF-67/LDH nanocomposite was prepared by the co-precipitation method. The surface morphology， crystal structure and composition of the composite were characterized by scanning electron microscope （SEM）， X-ray diffractometer （XRD），Raman spectroscopy （Raman） and X-ray photoelectron spectroscopy （XPS）. Oxygen evolution reaction （OER）， hydrogen evolution reaction （HER） and water decomposition performance were tested by an electrochemical workstation. The results show that the required OER overpotential of the compound in 1 mol/L KOH aqueous solution is （204号 329mV （20 （η10） ， and the HER overpotential is 175mV （20 （η10） . In the double electrode system， the current density reaches 10mA/cm2 ， and the voltage required for complete water splitting is 1.761 V. After 12 hours of HER （-20mA/cm2） chronopotential stability test， the final potential only drops about 6mV from the initial potential. Combined with related characterization analysis， the high activity of the catalyst benefits from the large electrochemically active area of the core-shel structure， which provides abundant active sites for the reaction. Through the co-effect of ZIF-8 @ ZIF-67 and LDH， ZIF-8@ZIF - 67/LDH shows good OER and HER activity and excellent stability.

Keywords： core shell; ZIF-8@ZIF-67/LDH; ZIF-8@ZIF-67; electrocatalysis

氢能作为一种清洁能源，具有储量丰富且燃烧热值高等优点，是未来理想的能源载体。（剩余8910字）