Options
Direct and broadband plasmonic charge transfer to enhance water oxidation on a gold electrode
Citation Link: https://doi.org/10.15480/882.3462
Publikationstyp
Journal Article
Publikationsdatum
2021-02-23
Sprache
English
TORE-URI
Enthalten in
Volume
15
Issue
2
Start Page
3188
End Page
3200
Citation
ACS Nano 15 (2): 3188-3200 (2021-02-23)
Publisher DOI
Scopus ID
PubMed ID
33496564
Publisher
American Chemical Society
Plasmonic photocatalysis via hot charge carriers suffers from their short lifetime compared with the sluggish kinetics of most reactions. To increase lifetime, adsorbates on the surface of a plasmonic metal may create preferential states for electrons to be excited from. We demonstrate this effect with O adsorbates on a nanoporous gold electrode. Nanoporous gold is used to obtain a broadband optical response, to increase the obtained photocurrent, and to provide a SERS-active substrate. Only with adsorbates present, we observe significant photocurrents. Illumination also increases the adsorbate coverage above its dark potential-dependent equilibrium, as derived from a two-laser in situ SERS approach. Density functional theory calculations confirm the appearance of excitable states below the Fermi level. The photocurrent enhancement and broadband characteristics reveal the potential of the plasmonic approach to improve the efficiency of photoelectrochemical water splitting.
Schlagworte
Chemical interface damping
Density functional theory
Hot electron
Hot hole
Nanoporous gold
Photoelectrocatalysis
Surface-enhanced Raman spectroscopy
DDC Class
600: Technik
620: Ingenieurwissenschaften
Projekt(e)
Funding Organisations
Publication version
publishedVersion
Loading...
Name
acsnano.0c09776.pdf
Size
3.5 MB
Format
Adobe PDF