Assoc. Prof. Lun Pan
Tianjin University, China
Metal defects modulation for photo/electrocatalysis
Photo/electro-catalysis has been regarded as a promising strategy for hydrogen production and high-value-added chemicals synthesis, in which the activity of photocatalyst depends significantly on their electronic structures. Using ZnO, TiO2, Co3O4, Mn3O4 as models, we develop a controllable method to tune the metal defects in crystal and the further electronic structures. The presence of metal defects changes the charge density and valence band edge of metal oxides, shows inherent p-type conductivity with high charge mobility, and room-temperature ferromagnetism. Importantly, the metal defects lead to the obvious electron spin polarization, which promotes the efficiency of charge separation and surface reaction via the parallel alignment of electron spin orientation, and shows very high photo/electrocatalytic activity. Notably, we further observed the positive effect of external magnetic fields on photocatalytic activity of spin-polarized TiO2, attributed to the enhanced electron-spin parallel alignment. This work may create the opportunity for tailoring the spin-dependent electronic structures in metal oxides.
Photocatalysis, photoelectrochemical catalysis, high-density biofuels
Dr. Lun Pan from Tianjin University (China) mainly focuses on the design and synthesis of functional photocatalysts; their related modulation of morphology and surface defects; and their applications in photocatalysis, such as photocatalytic isomerization, hydrogen generation, and environmental remediation. He has published 90 research papers in the journals of Nature Commun., JACS, Adv. Mater., Nano Energy, Adv. Sci., Adv. Energy Aci., ACS Nano, ACS Catal., etc.