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10金币准确翻译一段话
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Ni-supported catalysts on perovskite-type oxides have been prepared by ‘‘solid phase crystallization’’ (spc) method and tested for CO2 reforming of CH4 into synthesis gas at 850C. The Ni catalysts were obtained in situ during the reaction from the oxides as the precursors in which nickel species were homogeneously incorporated in the perovskite structure. Ni/Ca0.8Sr0.2TiO3 and Ni/BaTiO3 catalysts showed high activity as well as high sustainability among the catalysts tested. The high activity may be due to highly dispersed and stable Ni metal particles (diameter<1 nm) on the perovskite, where the nickel species thermally evolve from the cations homogeneously distributed in an inert perovskite matrix as the precursors during the reaction. Nickel species was partly incorporated in the perovskite structure by replacing the Ti site and partly separated as NiO from the structure after the calcination of the precursors, and the former species likely affords the highly dispersed Ni metal under the reducing atmosphere. The amount of NiO detected by XRD analyses was smaller on BaTiO3 than on Ca0.8Sr0.2TiO3, while that of surface Ni obtained by TGA was larger on Ca0.8Sr0.2TiO3 than on BaTiO3. It is thus likely that an incorporation of Ni was enhanced in BaTiO3 compared to Ca0.8Sr0.2TiO3, resulting in the higher dispersion of Ni metal particles on the former support. This well coincided with the activity of Ni/BaTiO3 being higher than that of Ni/Ca0.8Sr0.2TiO3 at high space velocity. The high sustainability against coke formation may be partly due to the mobile oxygen as well as due to the presence of alkaline earth metals in the perovskite supports. Oxygen mobility in the perovskite was further tested by CO2 pulse reactions, suggesting an easy migration of oxygen over the perovskite structure. It is most likely that the oxygen easily migrates from the supports to the surface of fine Ni particles, where the coke material can be oxidized into carbon oxides. |
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★ ★ ★ ★ ★ ★ ★ ★ ★ ★
小童2921(金币+2,VIP+0): 7-18 16:51
qingfeng877680(金币+3,VIP+0):MM翻译辛苦了。 7-26 11:13
zap65535(金币+2,VIP+0):专门保护美女的我特地给你补发金币 12-23 13:45
zap65535(金币+3,VIP+0):苦劳奖 12-23 13:45
小童2921(金币+2,VIP+0): 7-18 16:51
qingfeng877680(金币+3,VIP+0):MM翻译辛苦了。 7-26 11:13
zap65535(金币+2,VIP+0):专门保护美女的我特地给你补发金币 12-23 13:45
zap65535(金币+3,VIP+0):苦劳奖 12-23 13:45
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Ni-supported catalysts on perovskite-type oxides have been prepared by ‘‘solid phase crystallization’’ (spc) method and tested for CO2 reforming of CH4 into synthesis gas at 850C. 众所周知，钙钛矿型复合氧化物催化剂中的供镍催化剂是用固相结晶法合成，并通过c850 合成气系统中二氧化碳制备甲烷进行测试。 The Ni catalysts were obtained in situ during the reaction from the oxides as the precursors in which nickel species were homogeneously incorporated in the perovskite structure. 镍催化剂从潜体氧化物反应中得到的。在这种氧化物中镍均匀的混合在钙钛矿结构中。 Ni/Ca0.8Sr0.2TiO3 and Ni/BaTiO3 catalysts showed high activity as well as high sustainability among the catalysts tested. 在催化剂测试中 Ni/Ca0.8Sr0.2TiO3 和 Ni/BaTiO3 催化剂显示出高活性和高稳定性。 The high activity may be due to highly dispersed and stable Ni metal particles (diameter<1 nm) on the perovskite, where the nickel species thermally evolve from the cations homogeneously distributed in an inert perovskite matrix as the precursors during the reaction. 由于镍的高扩散性和小于1纳米的金属粒径在钙钛矿结构中该催化剂显示出高活性。在钙钛矿结构中镍热解时其阳离子均匀扩散在钙钛矿惰性母体中从而成为反应中的潜体。 不管怎么说，楼主的10个金币买四句话是可以的。所以只翻译四句。如果觉得好就加价吧！  都不容易！！ |
4楼2009-07-14 15:38:10
monitor2885
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