Journal
MATERIALS
Volume 12, Issue 18, Pages -Publisher
MDPI
DOI: 10.3390/ma12183012
Keywords
catalysis; ferricyanide (III) reduction; plasmon resonance; gold nanoparticles; hot electrons; electron transfer; size effect
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Funding
- C'Nano IdF
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Redox reactions are of great importance in environmental catalysis. Gold nanoparticles (Au-NPs) have attracted much attention because of their catalytic activity and their localized surface plasmon resonance (LSPR). In the present study, we investigated, in detail, the reduction of ferricyanide (III) ion into a ferrocyanide (II) ion catalyzed by spherical gold nanoparticles of two different sizes, 15 nm and 30 nm, and excited at their LSPR band. Experiments were conducted in the presence (or absence) of sodium thiosulfate. This catalysis is enhanced in the presence of Au- NPs under visible light excitation. This reduction also takes place even without sodium thiosulfate. Our results demonstrate the implication of hot electrons in this reduction.
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