Published August 1, 2007 | Version v1
Journal article Metadata-only

X-ray induced photoelectrochemistry on TiO2

Creators

  • 1. Synchrotron Radiation Research Center, Japan Atomic Energy Agency, 1-1-1 Koto Sayo-cho, Hyogo 679-5148 (Japan)
  • 2. Institute of Industrial Science, University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8505 (Japan)
  • 3. PRESTO, Japan Science and Technology Agency (JST), 4-1-8 Honcho Kawaguchi-shi, Saitama 332-0012 (Japan)
  • 4. Advanced Materials Laboratory, National Institute for Materials Science, 1-1-1 Koto, Mikazuki-cho, Hyogo 679-5148 (Japan)
  • 5. Kanagawa Academy of Science and Technology, Sakado, Takatsu-ku, Kawasaki-shi, Kanagawa 213-0012 (Japan)

Description

The electrochemical behaviour of TiO2 under X-ray irradiation was studied. Under X-ray irradiation a current, a negative shift in the rest potential, and electrochemical oxidation and decomposition of [FeII(CN)6]4- were clearly observed. The incident photon-current conversion efficiency and energy conversion efficiency was 400-2000% and 0.2-2%, respectively, depending on sample conditions. These results show that the photoelectrochemical reactions were promoted by X-rays with a high incident photon-current conversion efficiency. The photocurrent and photopotential were observed above 4.965 keV, which corresponds to the Ti-K edge, indicating that electron-hole pairs are formed during the relaxation process of the excited Ti atoms

Additional details

Identifiers

DOI
10.1016/j.electacta.2007.05.011;
PII
S0013-4686(07)00659-7;

Publishing Information

Journal Title
Electrochimica Acta
Journal Volume
52
Journal Issue
24
Journal Page Range
p. 6938-6942
ISSN
0013-4686
CODEN
ELCAAV

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
39009679
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
ELECTROCHEMISTRY; ELECTRONS; ENERGY CONVERSION; HOLES; IRRADIATION; KEV RANGE 01-10; OXIDATION; PHOTONS; TITANIUM OXIDES; X RADIATION
Descriptors DEC
BOSONS; CHALCOGENIDES; CHEMICAL REACTIONS; CHEMISTRY; CONVERSION; ELECTROMAGNETIC RADIATION; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; IONIZING RADIATIONS; KEV RANGE; LEPTONS; MASSLESS PARTICLES; OXIDES; OXYGEN COMPOUNDS; RADIATIONS; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS

Optional Information

Copyright
Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.