A2B2O7 pyrochlore compounds:A category of potential materials for clean energy and environment protection catalysis

作者：Junwei Xu,Rong Xi,Xianglan Xu,Yan Zhang,Xiaohui Feng,Xiuzhong Fang,Xiang Wang

摘要：A2B2O7 pyrochlore is a kind of important functional materials for different purposes,which has been investigated extensively by crystallographers and material scientists.However,the catalytic chemistry of this type of special compounds has rarely been documented,though a few researchers have tried to synthesize some pyrochlore compounds with different chemical compositions for a variety of green energy production and air pollution control reactions in the history.With the expectation to help catalysis scientists to get better acquaintance with,and gain deeper understanding on this type of compounds as heterogeneous catalysts,the major publications over the past several decades have been screened and reviewed in this paper,based also on our own experience of studying on this type of catalytic materials.The crystalline phase transformations of the compounds with the change of the A and B site cations,the phase change’s influences on the surface and bulk properties,and their subsequent impact on the catalytic performance for different reactions have been summarized.Furthermore,the future work which needs to be performed to perceive in depth this kind of important materials as catalysts has been proposed and suggested.We trust that this short review contains valuable information,which will provide great help for people to get better cognition for A2 B2 O7 pyrochlore compounds,and assist them to develop better catalysts for various reactions.

發文機構：Key Laboratory of Jiangxi Province for Environment and Energy Catalysis

關鍵詞：A2B2O7pyrochlorecompoundsCrystallinephasechangeLatticeandsurfaceoxygenvacanciesValue-addedCH4transformationAirpollutioncontrolreactionsRareearths

分類號： TB34[一般工業技術—材料科學與工程]