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Issue 10, 2013
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Quantification of photocatalytic hydrogen evolution

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A new photoreactor with defined irradiation geometry was developed and tested for the water reduction reaction using carbon nitride (“C3N4”) as a photocatalyst. The hydrogen evolution rate was investigated with a sun simulator (I = 1000 W m−2) in two different operation modes: circulation and stirring of the catalyst dispersion. Only in the stirred mode, where shear stress is lower, a stable hydrogen evolution rate of about 0.41 L m−2 h−1 is obtained. It is confirmed by experiments with D2O that hydrogen is obtained from the water splitting process and not by dehydrogenation of the sacrificial agent. The obtained rate results in an efficiency of <0.1% based on a reference experiment with a photovoltaic-powered electrolysis setup. The change from distilled water to tap or simulated sea water results in a lower hydrogen evolution rate of about 50%.

Graphical abstract: Quantification of photocatalytic hydrogen evolution

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Supplementary files

Article information

27 Dec 2012
17 Jan 2013
First published
29 Jan 2013

Phys. Chem. Chem. Phys., 2013,15, 3466-3472
Article type

Quantification of photocatalytic hydrogen evolution

M. Schwarze, D. Stellmach, M. Schröder, K. Kailasam, R. Reske, A. Thomas and R. Schomäcker, Phys. Chem. Chem. Phys., 2013, 15, 3466
DOI: 10.1039/C3CP50168J

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