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    Home > New progress in the study of photocatalysis of rare earth transition metal clusters

    New progress in the study of photocatalysis of rare earth transition metal clusters

    • Last Update: 2018-12-19
    • Source: Internet
    • Author: User
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    Professor Kong Xiangjian and Professor Long Lasheng, School of chemistry and chemical engineering, Xiamen University, have made new progress in the research of photocatalytic hydrogen production of rare earth transition metal (3d-4f) clusters The related achievements were published on the topic of "integration of lanthanide transition metal clusters onto CDs surfaces for photocatalytic hydrogen evolution" (doi: 10.1002/anie.201811211 )。 Photolysis of water is considered to be one of the effective ways to solve the environmental and energy problems Since the report of TiO 2 photodegradation materials, semiconductor materials have been widely concerned in Photodegradation of water In recent years, it has been found that loading metal nanoparticles on semiconductors can change the electronic structure of semiconductors and improve the photocatalytic performance However, it is difficult to understand the mechanism of photocatalysis at the atomic level by using polydisperse nanoparticles Metal clusters have a clear crystal structure, which is an ideal model to understand the structure-activity relationship of materials In our group, the rare earth transition metal cluster ln52ni56 (LN = EU, Gd, PR, nd) of different metals was loaded on the surface of CdS Semiconductor to effectively improve the separation efficiency of photogenerated electrons and holes, thus improving the performance of photocatalytic decomposition of water In the process of cluster loading, part of Ni 2 + in LN 52 Ni 56 clusters can be replaced by Cd 2 +, forming EU 52 Ni 56-x CD X / CdS composite system Photogenerated electrons can be transferred not only to the LUMO orbital of the cluster, but also to the rare earth Eu 3 + to form the EU 2 + catalytic active site It is this multichannel electron transfer pathway that makes eu52ni56 have higher photocatalytic performance than other rare earth homologues, reaching 33533 μ mol · H-1 · g-1 The synergistic effect between the metals provides a reference for the synthesis of efficient photocatalytic semiconductor composites The preparation of LN 52 Ni 56 cluster (source: angelw Chem Int ed.) was completed by Dr Chen Rong (first author), and Dr Yan Zhihao participated in some characterization work The work was supported by the Ministry of science and Technology (2014cb845601), the National Natural Science Foundation of China (21871224, 21673184, 21431005, 21390391 and 21721001), and the HuoYingDong foundation of the Ministry of Education (151013).
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