Quantification of photocatalytic hydrogen evolution

被引：71

作者：

Schwarze, Michael ^{[1
]}

Stellmach, Diana ^{[2
]}

Schroeder, Marc ^{[1
]}

Kailasam, Kamalakannan ^{[1
]}

Reske, Rulle ^{[1
]}

Thomas, Arne ^{[1
]}

Schomaecker, Reinhard ^{[1
]}

机构：

[1] Tech Univ Berlin, Dept Chem, D-10623 Berlin, Germany

[2] Helmholtz Zentrum Berlin, D-14109 Berlin, Germany

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2013年 / 15卷 / 10期

关键词：

VISIBLE-LIGHT IRRADIATION; GRAPHITIC CARBON NITRIDE; WATER REDUCTION; H-2; EVOLUTION; HARD;

D O I：

10.1039/c3cp50168j

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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%.

引用

页码：3466 / 3472

页数：7

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