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Title: Exceptional enhancement of H{sub 2} production in alkaline environment over plasmonic Au/TiO{sub 2} photocatalyst under visible light

A reaction environment modulation strategy was employed to promote the H{sub 2} production over plasmonic Au/semiconductor composites. It is shown that the fast consumption of the holes in plasmonic Au nanoparticles by methanol in alkaline reaction environment remarkably increases H{sub 2} generation rate under visible light. The photocatalytic reaction is mainly driven by the interband transition of plasmonic Au nanoparticles, and the apparent quantum efficiency of plasmon-assisted H{sub 2} production at pH 14 reaches 6% at 420 nm. The reaction environment control provides a simple and effective way for the highly efficient solar fuel production from biomass reforming through plasmonic photocatalysis in future.
Authors:
;  [1] ;  [2] ;  [1] ; ; ;  [3] ;  [4] ;  [1] ;  [2] ;  [5]
  1. Graduate School of Chemical Science and Engineering, Hokkaido University, Sapporo 060-0814 (Japan)
  2. (WPI-MANA), 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan)
  3. Environmental Remediation Materials Unit and International Center for Materials Nanoarchitectonics (WPI-MANA), 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan)
  4. TU-NIMS Joint Research Center, School of Materials Science and Engineering, Tianjin University, 92 Weijin Road, Tianjin 300072 (China)
  5. (China)
Publication Date:
OSTI Identifier:
22415245
Resource Type:
Journal Article
Resource Relation:
Journal Name: APL materials; Journal Volume: 3; Journal Issue: 10; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BIOMASS; COMPOSITE MATERIALS; ENERGY-LEVEL TRANSITIONS; GOLD; HOLES; HYDROGEN; METHANOL; MODULATION; NANOPARTICLES; PH VALUE; PHOTOCATALYSIS; PLASMONS; QUANTUM EFFICIENCY; SEMICONDUCTOR MATERIALS; TITANIUM OXIDES; VISIBLE RADIATION