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Surface plasmon-enhanced photochemical reactions on noble metal nanostructures

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  • Special Issue Heterogeneous Catalysis Theory
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Abstract

Nanoscale noble metals can exhibit excellent photochemical and photophysical properties, due to surface plasmon resonance (SPR) from specifically collective electronic excitations on these metal surfaces. The SPR effect triggers many new surface processes, including radiation and radiationless relaxations. As for the radiation process, the SPR effect causes the significant focus of light and enormous enhancement of the local surface optical electric field, as observed in surface-enhanced Raman spectroscopy (SERS) with very high detection sensitivity (to the single-molecule level). SERS is used to identify surface species and characterize molecular structures and chemical reactions. For the radiationless process, the SPR effect can generate hot carriers, such as hot electrons and hot holes, which can induce and enhance surface chemical reactions. Here, we review our recent work and related literature on surface catalytic-coupling reactions of aromatic amines and aromatic nitro compounds on nanostructured noble metal surfaces. Such reactions are a type of novel surface plasmon-enhanced chemical reaction. They could be simultaneously characterized by SERS when the SERS signals are assigned. By combining the density functional theory (DFT) calculations and SERS experimental spectra, our results indicate the possible pathways of the surface plasmon-enhanced photochemical reactions on nanostructures of noble metals. To construct a stable and sustainable system in the conversion process of the light energy to the chemical energy on nanoscale metal surfaces, it is necessary to simultaneously consider the hot electrons and the hot holes as a whole chemical reaction system.

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  1. State Key Laboratory of Physical Chemistry of Solid Surfaces; Department of Chemistry, College of Chemistry and Chemical Engineering, Collaborative Innovation Center of Chemistry for Energy Materials, Xiamen University, Xiamen, 361005, China

    De-Yin Wu, Meng Zhang, Liu-Bin Zhao, Yi-Fan Huang, Bin Ren & Zhong-Qun Tian

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  1. De-Yin Wu
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  2. Meng Zhang
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Wu, DY., Zhang, M., Zhao, LB. et al. Surface plasmon-enhanced photochemical reactions on noble metal nanostructures. Sci. China Chem. 58, 574–585 (2015). https://doi.org/10.1007/s11426-015-5316-y

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