Mechanism of oxygen releasing of copper ferrite in the formation of the corresponding oxygen-deficient compound  

作　　者：ZHANG Ping YU Bo ZHANG Lei 

机构地区：[1]Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing 102201,China

出　　处：《Science China Chemistry》2009年第1期101-108,共8页中国科学（化学英文版）

基　　金：Supported by the National Defense Fundamental Research Fund (Grant No. A1420080145)

摘　　要：Copper ferrite is a promising material for hydrogen production through thermochemical water splitting. In this work, the cation distribution of copper ferrite and the corresponding oxygen-deficient compound of spinel structure was analyzed based on the crystal structural chemistry theory. The mechanism of oxygen releasing of CuO, Fe2O3, CuFe2O4 and metal (M=Ni, Mn or Zn) doped copper ferrite in the process of temperature rising was investigated by differential thermal analysis-thermogravimetry (DTA-TG). By combining the theoretical analysis with experimental results, the mechanism of oxygen releasing of copper ferrite is proposed, which is different from that of other ferrites. For copper ferrite, the oxygen releasing caused by Cu(II)→Cu(I) plays a predominant role, while for other ferrites, the oxygen releasing resulting from Fe(III)·Fe(II) is dominant.Copper ferrite is a promising material for hydrogen production through thermochemical water splitting.In this work,the cation distribution of copper ferrite and the corresponding oxygen-deficient compound of spinel structure was analyzed based on the crystal structural chemistry theory.The mechanism of oxygen releasing of CuO,Fe2O3,CuFe2O4 and metal(M=Ni,Mn or Zn) doped copper ferrite in the proc-ess of temperature rising was investigated by differential thermal analysis-thermogravimetry(DTA-TG).By combining the theoretical analysis with experimental results,the mechanism of oxygen releasing of copper ferrite is proposed,which is different from that of other ferrites.For copper ferrite,the oxygen releasing caused by Cu(Ⅱ)→Cu(Ⅰ) plays a predominant role,while for other ferrites,the oxygen releas-ing resulting from Fe(Ⅲ)→Fe(Ⅱ) is dominant.

关 键 词：copper ferrite OXYGEN DEFICIENT COMPOUND crystal structural chemistry theory DTA-TG OXYGEN RELEASING MECHANISM 

分 类 号：O614.811[理学—无机化学]