Quantification of photocatalytic hydrogen evolution

  • Schwarze M
  • Stellmach D
  • Schroeder M
 et al. 
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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

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  • Michael Schwarze

  • Diana Stellmach

  • Marc Schroeder

  • Kamalakannan Kailasam

  • Rulle Reske

  • Arne Thomas

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