| 초록 |
Photoelectrochemical nitrogen reduction reaction (PEC-NRR) is the most promising candidate for ammonia synthesis because it merges the advantages of both photocatalytic and electrochemical processes. However in recent study, high stability of N2 triple bond, occurrence of a competing hydrogen evolution reaction, and recombination of electron hole pairs limit the efficiency of PEC-NRR. Herein we developed a nanohetero-junction structure of MoS2-rooted La2Zr2O7 nanofibers, which MoS2 acting to active site for NRR and La2Zr2O7 as a electron hole separator. Field emission-scanning of electron microscopy (FE-SEM), X-ray diffraction (XRD), Raman scattering, ultraviolet-visible spectroscopy (UV-vis) were utilized to investigate the material characterization of MoS2@La2Zr2O7 composites to investigate the morphology, crystal structure, chemical bonding energy, and optical properties. The morphological studies revealed that 2D MoS2 were grown in the surface of the La2Zr2O7 NFs. PEC-NRR activities of MoS2@La2Zr2O7 composite were investigated using cyclic voltammetry(CV), electrochemical impedance spectroscopy (EIS), electrochemical active surface area (ECSA), open-circuit voltage decay (OCVD), PL emission curve, and transient photocurrent responses in 0.1 M KOH electrolyte in N2 condition and compared with the sole MoS2 or La2Zr2O7 catalyst. |
