Journal
ACS NANO
Volume 11, Issue 1, Pages 968-974Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.6b07581
Keywords
plasmonic photocatalysis; Au triangular nanoprism; hydrogen generation; in situ reaction; single-particle spectroscopy
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Funding
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) of the Japanese Government [25220806, 25288035]
- JSPS [P15073]
- Grants-in-Aid for Scientific Research [15F15073] Funding Source: KAKEN
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In situ etching of single Au triangular nanoprism (TNP) was successfully monitored by the plasmonic photo-luminescence (PL) spectra using single-particle microscopy, which provides clear results to understand the geometric and anisotropic dependence of surface plasmon resonance in Au nanostructures. Various Au nanostructures (TNP, obtuse TNP (O-TNP) and nanodisk) were obtained to synthesize anisotropic Pt-Au as plasmonic photocatalyts for hydrogen generation. Single-particle PL spectra and finite-difference time-domain simulations demonstrate that the Pt-edged Au O-TNP has larger tip area and higher plasmon enhanced electrical field for hot electron transfer and charge separation, leading to more efficient photocatalytic hydrogen generation.
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