Lv Yujing, Zhang Wei, Gu Quan, Gao Ziwei
Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Xi'an Key Laboratory of Organometallic Material Chemistry, School of Chemistry and Chemical Engineering, Shaanxi Normal University, No. 620, West Chang'an Avenue Chang'an District, Xi'an, 710119, P.R. China.
Chemistry. 2023 Jan 9;29(2):e202202678. doi: 10.1002/chem.202202678. Epub 2022 Nov 14.
Promoting charge separation, constructing active sites, and improving the utilization of metal atoms are very important for the design of efficient photocatalysts. A simultaneous loading of Ni P cocatalysts on the inner and outer surfaces of mesoporous P-doped carbon nitride hollow nanospheres (PCNHS) to construct a Ni P@PCNHS@Ni P photocatalyst is reported. Ni P cocatalysts loading provides enough active sites on both the inner and outer surfaces for proton reduction, and the formed heterojunctions simultaneously promote the migration and separation of the photogenerated charges on the inner and outer surfaces. The photocatalytic reaction proceeds simultaneously on the inner and outer surfaces of Ni P@PCNHS@Ni P, which leads to a significantly improved photocatalytic water splitting performance and enhanced atomic utilization. Notably, the hydrogen evolution rate of Ni P@PCNHS@Ni P is 2.4 times higher than that of Pt-loaded PCNHS. The findings guide the design of hollow nanostructured composites with high-boosting photocatalytic performance.
促进电荷分离、构建活性位点以及提高金属原子利用率对于高效光催化剂的设计至关重要。本文报道了一种在介孔磷掺杂氮化碳空心纳米球（PCNHS）的内表面和外表面同时负载Ni P助催化剂，以构建Ni P@PCNHS@Ni P光催化剂的方法。Ni P助催化剂的负载在内表面和外表面都提供了足够的质子还原活性位点，并且形成的异质结同时促进了内表面和外表面光生电荷的迁移和分离。光催化反应在Ni P@PCNHS@Ni P的内表面和外表面同时进行，这导致光催化水分解性能显著提高，原子利用率增强。值得注意的是，Ni P@PCNHS@Ni P的析氢速率比负载Pt的PCNHS高2.4倍。这些发现为设计具有高提升光催化性能的中空纳米结构复合材料提供了指导。
