Photocatalytic hydrogen production is a technology to produce clean energy in line with the current social development. CdS is a photocatalyst with a suitable energy band structure. Ni2P is a typical co-catalyst with good electrical conductivity and promotes electron transfer. In this study, we prepared 2D/1D Ni2P/CdS composites by loading Ni2P nanosheets on CdS nanorods. By performing photoelectrochemical tests on the materials, we found that Ni2P loading helps to inhibit the photogenerated electron-hole recombination generated by CdS and improve the photogenerated carrier separation efficiency. Furthermore, the photocatalytic hydrogen production performance of Ni2P/CdS was evaluated, and it was demonstrated that the incorporation of Ni2P into the CdS structure resulted in an improvement of the photocatalytic hydrogen production. At a Ni2P loading of 10 wt%, the photocatalytic hydrogen production rate of Ni2P/CdS composites reaches a maximum value of 4.34 mmol h−1 g−1, which is 25.53 times higher than the photocatalytic hydrogen production rate of pure CdS material. Moreover, we learned from cycling experiments that Ni2P loading helps to slow down the photocorrosion phenomenon of CdS and improve the photocatalytic stability of CdS.

中文翻译：

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Ni2P 助催化剂改性 CdS 增强析氢并在可见光下保持强稳定性


光催化制氢是一种符合当前社会发展的生产清洁能源的技术。CdS 是一种具有合适能带结构的光催化剂。Ni2P 是一种典型的助催化剂，具有良好的导电性并促进电子转移。在这项研究中，我们通过在 CdS 纳米棒上加载 Ni2P 纳米片来制备 2D/1D Ni2P/CdS 复合材料。通过对材料进行光电化学测试，我们发现 Ni2P 负载有助于抑制 CdS 产生的光生电子-空穴复合，并提高光生载流子分离效率。此外，评估了 Ni2P/CdS 的光催化制氢性能，并证明将 Ni2P 掺入 CdS 结构导致光催化制氢的改善。当 Ni2P 负载量为 10 wt% 时，Ni2P/CdS 复合材料的光催化产氢速率达到最大值 4.34 mmol h−1 g−1，比纯 CdS 材料的光催化产氢速率高 25.53 倍。此外，我们从循环实验中了解到，Ni2P 负载有助于减缓 CdS 的光腐蚀现象并提高 CdS 的光催化稳定性。