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A Dual Plasmonic Photoelectrode System for Visible‐Light Photocatalysis
Author(s) -
Nishi Hiroyasu,
Miyake Koji,
Kao KunChe,
Tatsuma Tetsu
Publication year - 2020
Publication title -
chemnanomat
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.947
H-Index - 32
ISSN - 2199-692X
DOI - 10.1002/cnma.201900751
Subject(s) - photocathode , plasmon , photocatalysis , materials science , nanoparticle , coating , layer (electronics) , optoelectronics , non blocking i/o , electrode , nanotechnology , catalysis , chemistry , physics , biochemistry , quantum mechanics , electron
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 TiO 2 . Its PICS efficiency was improved by coating it further with porous TiO 2 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 TiO 2 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.