Thermochemical two-step water splitting cycles by monoclinic ZrO2-supported NiFe2O4 and Fe3O4 powders and ceramic foam devices

被引：98
作者：
Gokon, Nobuyuki [1 ]
Murayama, Hiroko [1 ]
Nagasaki, Ayumi [1 ]
Kodama, Tatsuya [1 ,2 ]
机构：
[1] Niigata Univ, Grad Sch Sci & Technol, Nishi Ku, Niigata 9502181, Japan
[2] Niigata Univ, Fac Engn, Dept Chem & Chem Engn, Nishi Ku, Niigata 9502181, Japan
来源：
SOLAR ENERGY | 2009年 / 83卷 / 04期
关键词：
Solar heat; Hydrogen production; Ferrite; Thermochemical cycle; Zirconia; Water splitting; SOLAR HYDROGEN-PRODUCTION; REDOX SYSTEM; IRON-OXIDE; PARTICLES; HEAT;
D O I：
10.1016/j.solener.2008.10.003
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
A thermochemical two-step water splitting cycle is examined for NiFe2O4 and Fe3O4 supported on monoclinic ZrO2 (NiFe2O4/m-ZrO2 and Fe3O4/m-ZrO2) in order to produce hydrogen from water at a high-temperature. The evolution of oxygen and hydrogen by m-ZrO2-supported ferrite powders was studied, and reproducible and stoichiometric oxygen/hydrogen productions were demonstrated through a repeatable two-step reaction. Subsequently, a ceramic foam device coated with NiFe2O4/m-ZrO2 powder was made and examined as a water splitting device by the direct irradiation of concentrated Xe-light in order to simulate solar radiation. The reaction mechanism of the two-step water splitting cycle is associated with the redox transition of ferrite/wustite on the surface of m-ZrO2. A hydrogen/oxygen ratio for these redox powder systems exhibited good reproducibility of approximately two throughout the repeated cycles. The foam device loaded NiFe2O4/m-ZrO2 powder was also successful with respect to hydrogen production through 10 repeated cycles. A ferrite conversion of 24-76% was obtained over an irradiation period of 30 min. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：527 / 537
页数：11
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