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Studies of exsolution and catalytic activity of metal nanocatalysts from parent perovskite

机译：研究的出溶作用和催化活性金属nanocatalysts父钙钛矿

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The synthesis of metal nanocatalysts exsolved from A-site deficient lanthanum strontium titanate (La0.4Sr0.4)(NixTi1-x)O3-gamma (LST, x = 0, LSTN, x = 0.06, 0.25 and 0.5) perovskites and their catalytic properties are presented. These perovskites were doped in the B-site with varying amounts of nickel to obtain a stable perovskite structure (LSTN) theoretically. The exsolution of metal was investigated under different conditions to control particle nucleation. Results on the catalytic activity of the metal-exsolved material in repetitive redox cycles showed that the LSTN materials catalyze the production of H-2 and CO in the half-cycle of reduction and oxidation, respectively, while the LST material could not. The macroscopic result obtained was complemented by in situ infrared studies at a molecular level. Our studies indicated that the LSTN materials are promising solid oxygen carriers for the conversion of methane in a novel process with highly efficient gas separation. The insights developed here were beneficial for the design of other materials capable of exsolution and for the applications of these materials ranging from catalysis, fuel cells, and beyond.
机译：的合成金属nanocatalysts exsolved一个网站缺乏镧钛酸锶(La0 4Sr0。4)(NixTi1-x) O3-gamma (LST, x = 0, LSTN,x = 0.06, 0.25和0.5)钙钛矿和他们催化性能。钙钛矿和不同掺杂在b区域大量的镍获得一个稳定的钙钛矿结构(LSTN)理论上。金属在不同条件下进行控制粒子成核。metal-exsolved材料的催化活性在重复的氧化还原循环显示LSTN材料催化h2和CO的生产著重的还原和氧化反应,分别在1号材料不能。宏观的结果是补充通过原位红外研究在分子水平上。我们的研究表明,LSTN材料承诺的固体氧载体转换过程和甲烷的小说高效气体分离。这里开发的设计是有益的其他材料的出溶作用和能力这些材料的应用范围催化、燃料电池和超越。

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