Constructing 1D CdS nanorod composites with high photocatalytic hydrogen production by introducing the Ni-based cocatalysts
Constructing 1D CdS nanorod composites with high photocatalytic hydrogen production by introducing the Ni-based cocatalysts
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DOI：
10.1016/j.catcom.2018.11.010
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发表时间：
2019-02
影响因子：
3.7
通讯作者：
Huaqiang Zhuang;Zhenping Cai;Wentao Xu;Xiaoyan Zhang;Mianli Huang;Xuxu Wang
中科院分区：
文献类型：
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作者：
Huaqiang Zhuang;Zhenping Cai;Wentao Xu;Xiaoyan Zhang;Mianli Huang;Xuxu Wang
通过在CdS纳米棒表面固定Ni基助催化剂，构建了NiO/CdS、NiS/CdS和Ni（OH）2/CdS等一维CdS纳米棒复合材料。研究了CdS复合材料光催化水溶液中乳酸重整制氢的性能，其中Ni（OH）2/CdS复合材料表现出最佳的光催化活性。可见，Ni（OH）2助催化剂可以提供一个合适的位置来促进光生电子的转移和更多的活性中心。此外，LSV曲线的结果表明，较高的光催化活性是由于较小的起始过电位，这可以加速质子还原成H2。本工作对镍类助催化剂提高光催化活性的机理提供了一个全面的理解。
Various 1D CdS nanorod composites (e.g. NiO/CdS, NiS/CdS and Ni(OH)2/CdS) were constructed by anchoring Ni-based cocatalysts on the surface of CdS nanorods. Photocatalytic reforming of lactic acid in aqueous medium for hydrogen generation using CdS composites was investigated, and Ni(OH)2/CdS sample displayed the best activity. Evidently, Ni(OH)2cocatalyst can offer a suitable potential position to boost the transfer of photo-generated electrons and much more active sites. Furthermore, the result of LSV curves discloses that the higher photocatalytic activity is due to the smaller onset overpotential, which can accelerate the reduction of protons into H2. This work provides a full comprehension of the mechanism that Ni species cocatalysts improve photocatalytic activity.