Fabrication of Pt/Ti/TiO2 Photoelectrodes by RF-Magnetron Sputtering for Separate Hydrogen and Oxygen Production
Academic Article
Publication Date:
2016
Citation:
Fabrication of Pt/Ti/TiO2 Photoelectrodes by RF-Magnetron Sputtering for Separate Hydrogen and Oxygen Production / G.L. Chiarello, C. Tealdi, P. Mustarelli, E. Selli. - In: MATERIALS. - ISSN 1996-1944. - 9:4(2016), pp. 279.1-279.10. [10.3390/ma9040279]
abstract:
Evolution of pure hydrogen and oxygen by photocatalytic water splitting was attained
from the opposite sides of a composite Pt/Ti/TiO2 photoelectrode. The TiO2 films were prepared
by radio frequency (RF)-Magnetron Sputtering at different deposition time ranging from 1 up to
8 h and then characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and
ultraviolet-visible-near infrared (UV-vis-NIR) diffuse reflectance spectroscopy. The photocatalytic
activity was evaluated by incident photon to current efficiency (IPCE) measurements and by
photocatalytic water splitting measurements in a two-compartment cell. The highest H2 production
rate was attained with the photoelectrode prepared by 6 h-long TiO2 deposition thanks to its high
content in the rutile polymorph, which is active under visible light. By contrast, the photoactivity
dropped for longer deposition time, because of the increased probability of electron-hole recombination
due to the longer electron transfer path.
from the opposite sides of a composite Pt/Ti/TiO2 photoelectrode. The TiO2 films were prepared
by radio frequency (RF)-Magnetron Sputtering at different deposition time ranging from 1 up to
8 h and then characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and
ultraviolet-visible-near infrared (UV-vis-NIR) diffuse reflectance spectroscopy. The photocatalytic
activity was evaluated by incident photon to current efficiency (IPCE) measurements and by
photocatalytic water splitting measurements in a two-compartment cell. The highest H2 production
rate was attained with the photoelectrode prepared by 6 h-long TiO2 deposition thanks to its high
content in the rutile polymorph, which is active under visible light. By contrast, the photoactivity
dropped for longer deposition time, because of the increased probability of electron-hole recombination
due to the longer electron transfer path.
IRIS type:
01 - Articolo su periodico
Keywords:
photocatalytic hydrogen production; water splitting; TiO2 thin film; RF-magnetron sputtering
List of contributors:
G.L. Chiarello, C. Tealdi, P. Mustarelli, E. Selli
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