Hydrogen Photoassisted Generation by Visible Light and an Earth Abundant Photocatalyst: Pyrite (FeS2)

被引：33
|
作者：
Barawi, Mariam [1 ,2 ]
Ferrer, Isabel J. [1 ]
Flores, Eduardo [1 ]
Yoda, Satoko [1 ]
Ares, Jose R. [1 ]
Sanchez, Carlos [1 ]
机构：
[1] Univ Autonoma Madrid, Dept Fis Mat, MIRE Grp, E-28049 Madrid, Spain
[2] Fdn Ist Italiano Tecnol, Ctr Biomol Nanotechnol, I-73010 Arnesano, LE, Italy
来源：
JOURNAL OF PHYSICAL CHEMISTRY C | 2016年 / 120卷 / 18期
关键词：
IRON PYRITE; THIN-FILMS; BAND-GAP; NATURAL PYRITE; PHOTOELECTRODES; PHOTOLYSIS; LAYER; WATER; CDS;
D O I：
10.1021/acs.jpcc.5b11482
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：
N-Type pyrite (FeS2) thin films, deposited on titanium substrates, have been synthesized and photoelectrochemically characterized. Its flat band potential has been estimated to be -0.75 +/- 0.05V vs Ag/AgCl by electrochemical impedance spectroscopy (EIS). The corresponding energy level diagram of the FeS2/electrolyte interface has been established. Profuse hydrogen flows have been produced under visible light illumination of FeS2 photoanode in a photo electrochemical cell (PEC) at different bias potentials. Their values, measured by mass spectrometry (MS), were higher than 5 mu mol H-2/min.cm(2). Hydrogen photogeneration efficiencies of similar to 8% have been reached.
引用
收藏
页码：9547 / 9552
页数：6
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