In situ surface engineering of ultrafine Ni2P nanoparticles on cadmium sulfide for robust hydrogen evolution
In situ surface engineering of ultrafine Ni2P nanoparticles on cadmium sulfide for robust hydrogen evolution
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硫化镉上超细 Ni2P 纳米颗粒的原位表面工程可实现稳健的析氢
DOI：
10.1039/c8cy00519b
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发表时间：
2018
影响因子：
5
通讯作者：
Yanhui Ao
中科院分区：
文献类型：
--
作者：
Junfang Wang;Peifang Wang;Jun Hou;Jin Qian;Chao Wang;Yanhui Ao
探索可见光驱动的低成本半导体材料用于分水，对克服化石燃料消耗和全球日益恶化的污染的缺点大有可为。本文首次报道了用简单的溶剂热法和进一步的表面磷化处理在硫化镉纳米棒上原位生长出分散良好的超细Ni2P纳米颗粒。优化组成的Ni2P-CDS杂化材料的平均析氢速率为34.9mmolh−1g−1，约为纯CDS的23倍。光催化活性的显著提高归因于分散良好的Ni2P超细助催化剂与硫化镉纳米棒之间的紧密界面，有利于光生电子的转移和分离，从而提高了光催化性能。特别是，由于转移路径的缩短，分散良好的超细Ni2P助催化剂的引入有利于光激发电子的捕获和随后质子的还原生成氢气。此外，所制备的杂化材料在可见光照射下具有良好的析氢稳定性。
Exploring visible light-driven, low-cost semiconductor materials for water-splitting holds great promise to overcome the drawbacks of fossil fuel consumption and worsening worldwide pollution. Here we report the in situ growth of well-dispersed ultrafine Ni2P nanoparticles on CdS nanorods by a simple solvothermal method and a further surface phosphatization treatment for the first time. The as-synthesized Ni2P–CdS hybrid with optimal composition showed an average hydrogen evolution rate of 34.9 mmol h−1 g−1, which was about 23 times higher than that of pure CdS. The dramatically enhanced photocatalytic activity can be ascribed to the intimate interface between the well-dispersed ultrafine Ni2P cocatalysts and the CdS nanorods, which was favorable for the photogenerated electrons’ transfer and separation which promoted the photocatalytic performance. Specifically, the introduction of well-dispersed ultrafine Ni2P cocatalysts was favorable for the trapping of photoexcited electrons and the subsequent reduction of protons to produce H2 because of the shortened transfer path. Furthermore, the as-prepared hybrids exhibited good stability for hydrogen evolution under visible light irradiation.