Plasmon-Mediated Oxidation Reaction on Au/p-Cu2O: The Origin of Hot Holes
| Autor: | Vitor R. R. Silveira, Erik Lewin, Jacinto Sá, Robert Bericat Vadell, Philipp Hawe |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Physical and theoretical chemistry QD450-801 plasmon hybrid system Nanotechnology 02 engineering and technology 010402 general chemistry 01 natural sciences Redox chemistry.chemical_compound Aniline Absorption (electromagnetic radiation) Plasmon Photosystem hole transfer mechanism business.industry 021001 nanoscience & nanotechnology 0104 chemical sciences Semiconductor chemistry Reagent Photocatalysis ultrafast transient spectroscopy photocatalysis 0210 nano-technology business |
| Zdroj: | Physchem; Volume 1; Issue 2; Pages: 163-175 Physchem, Vol 1, Iss 11, Pp 163-175 (2021) |
| ISSN: | 2673-7167 |
| DOI: | 10.3390/physchem1020011 |
| Popis: | More sustainable solutions are needed to produce chemicals and fuels, mainly to face rising demands and mitigate climate change. Light, as a reagent, has emerged as a route to activate small molecules, e.g., H2O, CO2, N2, and make complex chemicals in a process called photocatalysis. Several photosystems have been proposed, with plasmonic technology emerging as one the most promising technologies due to its high optical absorption and hot-carrier formation. However, the lifetime of hot carriers is unsuitable for direct use; therefore, they are normally coupled with suitable charge-accepting materials, such as semiconductors. Herein, a system is reported consisting of Au supported in p-Cu2O. The combination of p-Cu2O intrinsic photoactivity with the plasmonic properties of Au extended the system’s optical absorption range, increasing photocatalytic efficiency. More importantly, the system enabled us to study the underlying processes responsible for hot-hole transfer to p-Cu2O. Based on photocatalytic studies, it was concluded that most of the holes involved in aniline photo-oxidation come from hot-carrier injections, not from the PIRET process. |
| Databáze: | OpenAIRE |
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