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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >A Z-type heterojunction of bimetal sulfide CuNi2S4 and CoWO4 for catalytic hydrogen evolution
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A Z-type heterojunction of bimetal sulfide CuNi2S4 and CoWO4 for catalytic hydrogen evolution

机译：二金属硫化物CUNI2S4和COWO4催化氢进化的Z型异质结

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摘要

Research into catalytic materials that convert light energy into chemical energy by decomposing water still faces great difficulties. CuNi2S4 has attracted public attention due to its unique morphology; however, its high electron-hole recombination rate and weak charge separation efficiency limit its use in the field of catalysis. Herein, CoWO4 material is synthesized in situ on a CuNi2S4 surface by a hydrothermal method; the Z-type heterointerface constructed by the surface contact of the two materials under fusion shows a huge promotion effect on the catalytic ability. The performance (3754.3 mu mol g(-1) h(-1)) of the composite material (CW/CNS-12%) reached 42 and 6 times those of the two monomer materials, respectively, and the excellent catalytic ability of the composite is also reflected in its long-term stability. The experimental data proves that the modification of CuNi2S4 by building a heterostructure can improve the specific surface area of the material and the amount of carriers it generates. The charge transfer caused by the existence of the heterojunction hinders the recombination of carriers and holes; fluorescence and electrochemical characterization further confirms the charge transfer process in the Z-type heterojunction. This research provides new insights to promote catalytic performance by building heterostructures between monomer materials.
机译：通过分解水将光能转化为化学能的催化材料仍面临巨大的困难。由于其独特的形态，CUNI2S4引起了公众的关注;然而，其高电子 - 空穴重组率和弱电荷分离效率限制其在催化领域的使用。这里，通过水热法在CUNI2S4表面上原位合成CowO 4材料;由融合下两种材料的表面触点构成的Z型异渗面积显示出对催化能力的巨大促进作用。复合材料（CW / CNS-12％）的性能（3754.3μmolg（-1）H（-1））分别达到两种单体材料的42和6倍，以及优异的催化能力复合材料也反映在其长期稳定性。实验数据证明，通过构建异质结构的CUNI2S4的改变可以改善材料的比表面积和它产生的载体量。异质结引起的电荷转移阻碍了载体和孔的重组;荧光和电化学表征进一步证实了Z型异质结中的电荷转移过程。本研究提供了通过在单体材料之间建立异质结构来促进催化性能的新见解。

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