Zhang Kewang, Wang Cheng, Guo Siyu, Li Shujin, Wu Zhengying, Hata Shinichi, Li Jie, Shiraishi Yukihide, Du Yukou
College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
J Colloid Interface Sci. 2023 Apr 15;636:559-567. doi: 10.1016/j.jcis.2023.01.055. Epub 2023 Jan 13.
The notable surface plasmon resonance (SPR) effect of some metals has been applied to improve the efficiency of alcohol oxidation reactions, whereas the comprehensive investigation of Cu-assisted photoelectrocatalysis remains challenging. We herein successfully prepared trimetallic PdAgCu nanospheres (NSs) with abundant surface bulges for the advanced ethylene glycol oxidation reaction (EGOR) and compared them with bimetallic PdAg NSs to investigate the performance enhancement mechanism. Impressively, the as-optimized PdAgCu NSs exhibited superb mass activity and electrochemical stability. Moreover, under visible light illumination, the mass activity of PdAgCu NSs increased to 1.62 times compared to that in the dark, and in contrast, the mass activity of PdAg NSs only increased to 1.48 times that in the dark. A mechanistic study indicated that the incorporation of Cu not only strengthens the whole SPR effect of PdAgCu NSs but also further modifies the electronic structure of Pd. This work highlighted that the incorporation of Cu into PdAg NSs further enhanced the photoelectrocatalytic performance and increased noble metal atom utilization, which may provide guidance to fabricate novel and promising nanocatalysts in the field of photoelectrocatalysis.
一些金属显著的表面等离子体共振（SPR）效应已被应用于提高醇氧化反应的效率，而对铜辅助光电催化的全面研究仍然具有挑战性。我们在此成功制备了具有丰富表面凸起的三金属钯银铜纳米球（NSs）用于先进的乙二醇氧化反应（EGOR），并将它们与双金属钯银纳米球进行比较，以研究性能增强机制。令人印象深刻的是，优化后的钯银铜纳米球表现出卓越的质量活性和电化学稳定性。此外，在可见光照射下，钯银铜纳米球的质量活性相比黑暗中增加到1.62倍，相比之下，钯银纳米球的质量活性仅增加到黑暗中的1.48倍。机理研究表明，铜的掺入不仅增强了钯银铜纳米球的整体SPR效应，还进一步改变了钯的电子结构。这项工作突出了将铜掺入钯银纳米球中进一步提高了光电催化性能并提高了贵金属原子利用率，这可能为在光电催化领域制备新型且有前景的纳米催化剂提供指导。
