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中文摘要：
采用柠檬酸法合成了BaCeO3和掺杂Y^3＋的BaCe0.9Y0.1O3-δ复合氧化物,以Ru3（CO）12为前体,利用浸渍法制备了Ru/BaCeO3和Ru/BaCe0.9Y0.1O3-δ催化剂.通过X射线衍射、扫描电镜和透射电镜技术对样品进行了表征,并在固定床反应器中考察了催化剂的氨合成反应活性.结果表明,载体BaCeO3的稳定性优于BaCe0.9Y0.1O3-δ,但Ru/BaCe0.9Y0.1O3-δ催化剂的氨合成活性明显高于Ru/BaCeO3,在3.0MPa,15000h？1,425oC反应时,Ru/BaCe0.9Y0.1O3-δ催化剂上氨合成反应速率达到432.5ml/（g·h）,是Ru/BaCeO3催化剂的1.6倍.这种活性和稳定性的显著差异来自载体中Ce^4＋与Ru纳米粒子间的电子作用.
英文摘要：
Barium cerate （BaCeO3） and yttrium-doped barium cerate （BaCe0.9Y0.1O3-δ） were synthesized by the citric acid method and used as supports for Ru/BaCeO3 and Ru/BaCe0.9Y0.1O3-δ catalysts prepared by incipient wetness impregnation using Ru3（CO）12 as precursor. The supports and catalysts were characterized by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. Their catalytic properties for ammonia synthesis were evaluated in a fixed-bed reactor. The stability of BaCeO3 was superior to that of BaCe0.9Y0.1O3-δ, and the catalytic activity of Ru/BaCe0.9Y0.1O3-δ was higher than that of Ru/BaCeO3. The rate of ammonia synthesis over Ru/BaCe0.9Y0.1O3-δ was 432.5 ml/（g·h） at 3.0 MPa, 425 oC, and 15 000 h-1, which was 1.6 times higher than that of Ru/BaCeO3. The electronic interaction between Ce^4＋ and Ru nanoparticles was the key factor for the difference in catalytic activity and stability.
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