Lattice Oxygen Transfer in Fluorite-Type Oxides Containing Ce, Pr, and/or Tb
Lattice Oxygen Transfer in Fluorite-Type Oxides Containing Ce, Pr, and/or Tb
复制标题
DOI：
10.1006/jssc.2000.8913
复制
发表时间：
2000-11
影响因子：
5.4
通讯作者：
Z. Kang;L. Eyring
中科院分区：
文献类型：
--
作者：
Z. Kang;L. Eyring
例如，在用于处理废气、从气体混合物如空气中提取纯氧或从含氢化合物如水或甲烷中提取氢的三元催化剂（TWC）中，需要氧转移能力（OTC）。在与萤石相关的材料中探索了这种性质，其化学式为Ce 1− x − y − z − p Pr x Tb y M z R p O 2− x（x + y + z >0.5），其中M是金属，特别是Zr、Ti、V、Mo、W、Nb、Mn、Cu、Cr、Fe、Ni、Co、Ta和Bi，其中R是另一种稀土元素。这些氧化物的OTC是萤石相关结构的特性和Ce、Pr和/或Tb的可变化合价所固有的。这种氧化物在还原和氧化条件下可以具有OTC性质，而没有任何重构相变。OTC数据的一些二元，三元和四元氧化物含有Ce，Pr，或Tb进行了讨论。
Abstract Oxygen transfer capacity (OTC) is needed, for example, in three-way catalysts (TWC) for treatment of exhaust gases, extraction of pure oxygen from gaseous mixtures such as air, or the extraction of hydrogen from hydrogen-containing compounds such as water or methane. This property is explored in fluorite-related materials of the formula Ce 1− x − y − z − p Pr x Tb y M z R p O 2− x ( x + y + z >0.5) in which M is a metal, especially Zr, Ti, V, Mo, W, Nb, Mn, Cu, Cr, Fe, Ni, Co, Ta, and Bi, and in which R is another rare-earth element. The OTC of these oxides is inherent in the characteristics of fluorite-related structures and the variable valency of Ce, Pr, and/or Tb. Such oxides can have the OTC property under reducing and oxidizing conditions without any reconstructive phase transitions. OTC data of some binary, ternary, and quaternary oxides containing Ce, Pr, or Tb are discussed.