Metal-Free Photocatalytic Graphitic Carbon Nitride on p-Type Chalcopyrite as a Composite Photocathode for Light-Induced Hydrogen Evolution

被引：56

作者：

Yang, Florent ^{[1
]}

Lublow, Michael ^{[3
]}

Orthmann, Steven ^{[1
]}

Merschjann, Christoph ^{[1
]}

Tyborski, Tobias ^{[1
]}

Rusu, Marin ^{[1
]}

Kubala, Sven ^{[1
]}

Thomas, Arne ^{[2
]}

Arrigo, Rosa ^{[3
]}

Haevecker, Michael ^{[1
]}

Schedel-Niedrig, Thomas ^{[1
]}

机构：

[1] Helmholtz Zentrum Berlin GmbH, D-14109 Berlin, Germany

[2] Tech Univ Berlin, Inst Chem, Fak 2, D-10623 Berlin, Germany

[3] Fritz Haber Inst Max Planck Gesell, D-14195 Berlin, Germany

来源：

CHEMSUSCHEM | 2012年 / 5卷 / 07期

关键词：

carbon nitride; hydrogen; photochemistry; photoelectron spectroscopy; thin films; VISIBLE-LIGHT; SOLID-SOLUTION; WATER OXIDATION; H-2; EVOLUTION; IRRADIATION; OXYNITRIDE; REDUCTION; NM;

D O I：

10.1002/cssc.201100691

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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. We present herein the preparation and characterization of graphitic carbon nitride (g-C3N4) films on p-type semiconducting CuGaSe2 chalcopyrite thin-film substrates by thermal condensation of a dicyandiamide precursor under inert-gas conditions. Structural and surface morphological studies of the carbon nitride films suggest a high porosity of g-C3N4 thin films consisting of a network of nanocrystallites. Photoelectrochemical investigations show light-induced hydrogen evolution upon cathodic polarization 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 has been shown that g-C3N4 films coated on p-type CuGaSe2 thin films can be successfully applied as new photoelectrochemical composite photocathodes for light-induced hydrogen evolution.

引用

页码：1227 / 1232

页数：6

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