A Dual Plasmonic Photoelectrode System for Visible‐Light Photocatalysis

Abstract

Plasmonic photocathodes based on plasmon‐induced charge separation (PICS) were prepared by depositing an Au nanoparticle (AuNP) ensemble on a transparent electrode and coating it with compact TiO2. Its PICS efficiency was improved by coating it further with porous TiO2 or introducing a NiO blocking layer as an underlayer of the AuNP ensemble. The former photocathode was modified further with Pt co‐catalyst nanoparticles, and combined with a PICS photoanode fabricated by depositing a AuNP ensemble on compact TiO2 and coating it with a Ni(OH)2 charge accumulation layer. The dual plasmonic photoelectrode system thus obtained exhibited a higher efficiency than the sum of the efficiencies of the single photoanode and single photocathode.

Anisotropic dual-plasmonic hetero-nanostructures with tunable plasmonic coupling effects

“…Nowadays, hetero-nanostructures with various compositions and morphologies have received scientic attention due to generated synergistic effects and promising multifunctional physicochemical properties. [1][2][3][4][5][6] Specically, noble metal-semiconductor heterostructures harnessing the phenomenon of localized surface plasmon resonance are utilized for a broad range of applications including photocatalysis, 7,8 photovoltaics, 9,10 water splitting, 11,12 optics, 13 and biomedicine. [14][15][16][17] In addition to noble metals, which support LSPRs in the visible spectral range and are traditionally used in plasmonics, 18 vacancy-doped copper chalcogenides are actively investigated for prospective utilization in multiple elds.…”

Wavelength-Dependent Selective Acceleration of CO2 Reduction and H2 Evolution Using a Plasmonic Gold Nanorod Electrode

“…Photoelectrochemical solar-to-fuel conversion has been considered as a promising strategy for achieving a sustainable society. − In addition to established semiconductor-based electrodes, plasmonic electrodes have also attracted considerable attention owing to their unique light-harvesting properties associated with localized surface plasmon resonance (LSPR). − LSPR arises from the excitation of the collective oscillation of free electrons on a noble metal nanoparticle surface upon light irradiation, and hot carriers generated upon LSPR excitation have recently been reported to accelerate electrochemical reactions. − Namely, electron transfer between a plasmonic electrode and a reaction substrate can be promoted upon LSPR excitation, leading to the enhancement of electrocatalytic current under light irradiation. Furthermore, the use of a plasmonic electrode in combination with electrocatalysts enables us to accelerate an intended reaction including energy-storing reactions such as hydrogen (H 2 ) evolution, − carbon dioxide (CO 2 ) reduction, − nitrate reduction, and oxygen evolution. ,− …”

Oxygen Vacancies Induced Plasmonic Effect for Realizing Broad‐Spectrum‐Driven Photocatalytic H2 Evolution over an S‐Scheme CdS/W18O49 Heterojunction

“…In the past decades, scientists have been committed to exploring renewable energy sources due to the increasing demand for fossil fuels and worsening environmental conditions [1–5] . As we know, H 2 energy, one of the cleanest energy sources, has been widely considered as a promising candidate to fossil fuel for solving the problem of energy crisis [6–10] .…”