Abstract Exploiting visible-light-responsive photocatalysts for highly-efficient water-splitting is a very promising way to achieve the renewable hydrogen energy. To this end, the rational manipulation on the composition and structure of semiconductor nanomaterials appears extremely necessary. Herein, we construct a unique hybrid consisting of P-doped CZ0.10S-0.5P porous nano-spheres coupled with Ni2P and reduced graphene oxide (rGO) cocatalysts (CZ0.10S-0.5P@Ni2P/rGO), which exhibits an outstanding performance for H2 evolution reaction (HER) under visible-light (λ > 420 nm) irradiation. Noticeably, the CZ0.10S-0.5P@2Ni2P/1.5rGO with 2 wt%-Ni2P and 1.5 wt%-rGO delivers an exceptional HER rate of 616.8 mmol∙h−1∙g−1 (the apparent quantum efficiency reaches 77.0% at 475 nm), outperforming that of Pt-loaded CZ0.10S-0.5P and the great majority of CdS-based composites reported previously. In addition, the CZ0.10S-0.5P@2Ni2P/1.5rGO composite also presents a steady H2 generation activity under prolonged irradiation. The superior photocatalytic property of CZ0.10S-0.5P@Ni2P/rGO could be associated with the abundant active sites provided by Ni2P, excellent visible-light absorption, and effective charge transfer and separation enabled by the Schottky junctions formed between CZ0.10S-0.5P and Ni2P/rGO. The findings indicated here could promote the design and manufacture of advanced semiconductor nanostructures for sustainable energy applications.

中文翻译：

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由 Ni2P 和还原氧化石墨烯装饰的 P 掺杂 Cd1-xZnxS 多孔纳米球诱导的高效可见光驱动 H2 演化

摘要 利用可见光响应光催化剂进行高效分解水是实现可再生氢能的一条非常有前景的途径。为此，对半导体纳米材料的组成和结构进行合理操纵显得极为必要。在此，我们构建了一种独特的混合物，由 P 掺杂的 CZ0.10S-0.5P 多孔纳米球与 Ni2P 和还原氧化石墨烯 (rGO) 助催化剂 (CZ0.10S-0.5P@Ni2P/rGO) 组成，表现出优异的性能。在可见光 (λ > 420 nm) 照射下的 H2 析出反应 (HER) 性能。值得注意的是，具有 2 wt%-Ni2P 和 1.5 wt%-rGO 的 CZ0.10S-0.5P@2Ni2P/1.5rGO 提供了 616.8 mmol∙h−1∙g−1 的卓越 HER 率（表观量子效率达到 77.0%在 475 nm），优于负载 Pt 的 CZ0.10S-0。5P 和之前报道的绝大多数 CdS 基复合材料。此外，CZ0.10S-0.5P@2Ni2P/1.5rGO复合材料在长时间照射下也表现出稳定的H2生成活性。CZ0.10S-0.5P@Ni2P/rGO 优异的光催化性能可能与 Ni2P 提供的丰富活性位点、优异的可见光吸收以及 CZ0.10S-之间形成的肖特基结实现的有效电荷转移和分离有关。 0.5P 和 Ni2P/rGO。这里指出的发现可以促进用于可持续能源应用的先进半导体纳米结构的设计和制造。5P@Ni2P/rGO 可能与 Ni2P 提供的丰富活性位点、优异的可见光吸收以及由 CZ0.10S-0.5P 和 Ni2P/rGO 之间形成的肖特基结实现的有效电荷转移和分离有关。这里指出的发现可以促进用于可持续能源应用的先进半导体纳米结构的设计和制造。5P@Ni2P/rGO 可能与 Ni2P 提供的丰富活性位点、优异的可见光吸收以及由 CZ0.10S-0.5P 和 Ni2P/rGO 之间形成的肖特基结实现的有效电荷转移和分离有关。这里指出的发现可以促进用于可持续能源应用的先进半导体纳米结构的设计和制造。