Florent Yang, Michael Lublow, Steven Orthmann, Christoph Merschjann, Tobias Tyborski, Marin Rusu, Michael Kanis, Arne Thomas, Rosa Arrigo, Michael Haevecker, Thomas Schedel-Niedrig
Very recently, it has been shown that an abundant material, polymeric carbon
nitride, can produce hydrogen from water under visible-light irradiation in the
presence of a sacrificial donor [1]. We will present here the preparation and
characterization of graphitic carbon nitride (g-C3N4) films on semiconducting
substrates by thermal condensation of dicyandiamide precursor under inert gas
conditions. Structural and surface morphological studies of the carbon nitride
films suggest a high porosity of g-C3N4 thin film consisting of a network of
nanocrystallites. Photo-electrochemical investigations show upon cathodic
polarization light-induced hydrogen evolution for a wide range of proton
concentrations in the aqueous electrolyte. Additionally, Synchrotron radiation
based photoelectron spectroscopy has been applied to study the
surface/near-surface chemical composition of the utilized g-C3N4 film
photocathodes. For the first time it is shown that g-C3N4 films can be
successfully applied as photoelectrochemical material for light induced
hydrogen evolution.
[1]X. Wang, K. Maeda, A. Thomas, K. Takanabe, G. Xin, J. M. Carlsson, K.
Domen, M. Antonietti, Nature Mat. 2009, 8, 76-80.
View original:
http://arxiv.org/abs/1202.3266
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