Harnessing infrared photons for photoelectrochemical hydrogen generation. A PbS quantum dot based "quasi-artificial leaf"
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Other documents of the author: Trevisan, Roberto; Rodenas, Pau; González Pedro, Victoria; Sima, Cornelia; S. Sánchez, Rafael; Barea, Eva M; Mora-Sero, Ivan; Fabregat-Santiago, Francisco; Giménez Juliá, Sixto
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comunitat-uji-handle2:10234/2507
comunitat-uji-handle3:10234/6973
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Title
Harnessing infrared photons for photoelectrochemical hydrogen generation. A PbS quantum dot based "quasi-artificial leaf"Author (s)
Date
2013Publisher
American Chemical SocietyISSN
1948-7185Bibliographic citation
TREVISAN, Roberto, et al. Harnessing Infrared Photons for Photoelectrochemical Hydrogen Generation. A PbS Quantum Dot Based “Quasi-Artificial Leaf”. The Journal of Physical Chemistry Letters, 2013, vol. 4, no 1, p. 141-146.Type
info:eu-repo/semantics/articlePublisher version
http://pubs.acs.org/doi/abs/10.1021/jz301890mVersion
info:eu-repo/semantics/acceptedVersionSubject
Abstract
Hydrogen generation by using quantum dot (QD) based heterostructures has emerged as a promising strategy to develop artificial photosynthesis devices. In the present study, we sensitize mesoporous TiO2 electrodes with ... [+]
Hydrogen generation by using quantum dot (QD) based heterostructures has emerged as a promising strategy to develop artificial photosynthesis devices. In the present study, we sensitize mesoporous TiO2 electrodes with in-situ-deposited PbS/CdS QDs, aiming at harvesting light in both the visible and the near-infrared for hydrogen generation. This heterostructure exhibits a remarkable photocurrent of 6 mA·cm-2, leading to 60 mL·cm-2·day-1 hydrogen generation. Most importantly, confirmation of the contribution of infrared photons to H 2 generation was provided by the incident-photon-to-current- efficiency (IPCE), and the integrated current was in excellent agreement with that obtained through cyclic voltammetry. The main electronic processes (accumulation, transport, and recombination) were identified by impedance spectroscopy, which appears as a simple and reliable methodology to evaluate the limiting factors of these photoelectrodes. On the basis of this TiO 2/PbS/CdS heterostructrure, a "quasi-artificial leaf" has been developed, which has proven to produce hydrogen under simulated solar illumination at (4.30 ± 0.25) mL·cm-2·day -1 [-]
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The Journal of Physical Chemistry Letters (2013), vol. 4, no 1Rights
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