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Boosting Photocatalytic Hydrogen Evolution Reaction Using Dual Plasmonic Antennas

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journal contribution
posted on 12.04.2021, 14:37 by Jing-Liang Yang, Yong-Lin He, He Ren, Han-Liang Zhong, Jia-Sheng Lin, Wei-Min Yang, Ming-De Li, Zhi-Lin Yang, Hua Zhang, Zhong-Qun Tian, Jian-Feng Li
Plasmon-mediated photocatalytic water splitting has attracted extensive attention due to its bright future in using visible light, but the enhancement mechanism is still unclear, and the efficiency remains low. Herein, a dual-plasmonic-antenna strategy that allows efficient generation of energetic hot electrons and strong electromagnetic fields simultaneously has been developed to boost the photocatalytic hydrogen evolution reaction (HER). Au@CdS core–shell nanoparticles are assembled on Ag@SiO2 shell-isolated nanoparticles, forming dual-plasmonic-antenna nanocomposites. Transient absorption spectroscopic experiments and electromagnetic field simulations demonstrate that both hot-electron transfer and plasmon-induced resonance energy transfer exist in this system. The Au@CdS antenna can generate energetic hot electrons to trigger the HER, while the Ag@SiO2 antenna produces strong electromagnetic fields to promote the generation and separation of hot carriers, thus significantly improving the HER performance under visible light irradiation. Such a dual-plasmonic-antenna concept overcomes the intrinsic limitation of traditional plasmonic photocatalytic materials and offers unique opportunities to develop efficient photocatalysts.