Self-regenerating Rh- and Pt-based perovskite catalysts for automotive-emissions control.
Self-regenerating Rh- and Pt-based perovskite catalysts for automotive-emissions control.
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DOI：
10.1002/anie.200503938
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发表时间：
2006-09
影响因子：
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通讯作者：
Hirohisa Tanaka;M. Taniguchi;M. Uenishi;Nobuhiko Kajita;Isao Tan;Y. Nishihata;J. Mizuki;K. Narita;M. Kimura;K. Kaneko
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文献类型：
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作者：
Hirohisa Tanaka;M. Taniguchi;M. Uenishi;Nobuhiko Kajita;Isao Tan;Y. Nishihata;J. Mizuki;K. Narita;M. Kimura;K. Kaneko
元素形成钙钛矿，并且当满足公差因子时，这些可以被部分替代。为了保持电中性，有三种可能的组合：A1+B5+O3，A2+B4+O3和A3+B3+O3。钛酸钡（A2+B4+O3的组合）是一种电子陶瓷，用于电容器和传感器，但不作为催化剂。LaCoO3是一种A3+B3+O3钙钛矿，其催化性能自20世纪70年代以来一直受到关注[4]，LaFe0. 95Pd0。2002年10月起，05O3作为三效催化剂在工业上应用于汽油车尾气排放控制。为了研究自再生性能，通过醇盐法制备了含有Pd、Rh或Pt的钙钛矿催化剂。[1]对氧化（O）、还原（OR）和再氧化（ORO）的样品进行X射线吸收精细结构（XAFS）测量。的X射线吸收近边结构（XANES）光谱在Rh K边（23.220 keV）的LaFe 0。95Rh0。在图1a中示出了每次处理之后的05O3，并且在图1 B中示出了Rh周围的计算的径向结构函数。当地
elements form perovskites, and these can be partially substituted when the tolerance factors are met. To maintain electroneutrality, three combinations are possible: A1+B5+O3, A2+B4+O3, and A3+B3+O3. BaTiO3 (an A2+B4+O3 combination) is an electroceramic that is used in capacitors and transducers but not as a catalyst. LaCoO3 is an A3+B3+O3 perovskite whose catalytic properties have attracted attention since the 1970s,[4] and LaFe0. 95Pd0. 05O3 has been used industrially as a three-way catalyst for gasoline automotiveemission control since October 2002. To study the self-regenerating properties, perovskite catalysts containing Pd, Rh, or Pt were prepared by the alkoxide method.[1] X-ray absorption fine structure (XAFS) measurements were carried out on samples that were oxidized (O), reduced (OR), and re-oxidized (ORO). The X-ray absorption near-edge structure (XANES) spectrum at the Rh K-edge (23.220 keV) for LaFe0. 95Rh0. 05O3 after each treatment is shown in Figure 1a, and the calculated radial structure function around Rh is shown in Figure 1 b. The local