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Issue 10, 2013
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Quantification of photocatalytic hydrogen evolution

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Abstract

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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Publication details

The article was received on 27 Dec 2012, accepted on 17 Jan 2013 and first published on 29 Jan 2013


Article type: Paper
DOI: 10.1039/C3CP50168J
Citation: Phys. Chem. Chem. Phys., 2013,15, 3466-3472
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    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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