Iron-containing yttria-stabilized zirconia system for two-step thermochemical water splitting

被引：36

作者：

Gokon, Nobuyuki ^{[1
]}

Minno, Takayuki ^{[1
]}

Nakamuro, Yumiko ^{[1
]}

Kodama, Tatsuya ^{[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：

JOURNAL OF SOLAR ENERGY ENGINEERING-TRANSACTIONS OF THE ASME | 2008年 / 130卷 / 01期

关键词：

solar chemistry; concentrated solar heat; solar hydrogen; thermochemical water splitting; redox metal oxide;

D O I：

10.1115/1.2807197

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：

An iron-containing yttria-stabilized zirconia (YSZ) or Fe-YSZ was found to be a promising working redox material for the thermochemical two-step water-splitting cycle. The Fe-YSZ was formed by a high-temperature reaction between YSZ doped with more than 8 mol % Y2O3 and Fe3O4 supported on the YSZ at 1400 degrees C in an inert atmosphere. The formed Fe-YSZ reacted with steam to generate hydrogen at 1000 degrees C. The oxidized Fe-YSZ was reactivated by a thermal reduction at 1400 degrees C in an inert atmosphere. The alternative O-2 and H-2 generations in the repeated two-step reactions and the X-ray diffraction and chemical analysis studies on the solid materials indicated that the two-step water splitting was associated with a redox transition between Fe2+-Fe3+ ions in the cubic YSZ lattice.

引用

页数：6

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