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Materials 2016, 9(4), 279; doi:10.3390/ma9040279

Fabrication of Pt/Ti/TiO2 Photoelectrodes by RF-Magnetron Sputtering for Separate Hydrogen and Oxygen Production

1
Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, Milano 20133, Italy
2
Dipartimento di Chimica, Università degli Studi di Pavia, viale Taramelli 16, Pavia 27100, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Klara Hernadi
Received: 3 February 2016 / Revised: 31 March 2016 / Accepted: 5 April 2016 / Published: 8 April 2016
(This article belongs to the Special Issue Advancement of Photocatalytic Materials 2016)
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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. View Full-Text
Keywords: photocatalytic hydrogen production; water splitting; TiO2 thin film; RF-magnetron sputtering photocatalytic hydrogen production; water splitting; TiO2 thin film; RF-magnetron sputtering
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Chiarello, G.L.; Tealdi, C.; Mustarelli, P.; Selli, E. Fabrication of Pt/Ti/TiO2 Photoelectrodes by RF-Magnetron Sputtering for Separate Hydrogen and Oxygen Production. Materials 2016, 9, 279.

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