| The human society has found itself faced with an intensively growing energy crisis,and been paying more and more serious attention to the exploitation of renewable efficient environment-friendly energy resources,among which photocatalytic water splitting prevails by its corresponding merits.However,the deficiency of production remains a significant barrier for the approach to be applied in industry,leaving the niche of efficiency enhancement to be filled.The boost of electron-hole separation and the optimization of redox pathway are often decided to be the keys to a successful water-splitting strategy,the research on which is being conducted based on the employment of chirality in this dissertation.For the enhancement of electron-hole separation,bath-flower-like cobalt-based co-catalyst for photocatalytic water splitting had been synthesized and characterized,the application of which elevated the catalytic activity by about 24 times.Then the surface of the co-catalyst concerned got chiralmodified without any external components being introduced for the manipulation of the pathway of oxidation at the equivalent anode,and the role of spin-filter and the influence to catalytic activity by chiral structures embedded in the pathway for the transmission of electrons in redox were confirmed by the comparison of hydrogen evolution efficiency.Furthermore,the feasibility of Chiral-Induced Spin Selectivity(CISS)effect to two-dimensional MOF had been investigated,the structure of which resembled the co-catalyst's fabric of significance for determining the catalytic activity.A response of its conductive properties to external magnetic fields had been authenticated.These are supposed to provide with practical references of industrial photocatalytic water splitting and to consolidate the theoretical basis concerned,by the optimization of cocatalysts possessing sound conductive properties and the manipulation of the reaction's pathway at the equivalent anode. |
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