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麦克默瑞提克(上海）仪器有限公司

2014/09/23 11:48

今天给大家分享的是2014年7月份《Applied Catalysis B: Environmental》上发表的一篇名为：Self-sustained combustion of carbon monoxide promoted by the Cu-Ce/ZSM-5 catalyst in CO/O₂/N₂ atmosphere

文章摘要如下：

The Cu/ZSM-5, Ce/ZSM-5 and Cu-Ce/ZSM-5 catalysts were prepared and characterized in this investigation and the catalytic activity of carbon monoxide (CO) combustion under these catalysts was determined by temperature-programmed oxidation. The activity for the CO combustion follows the decreasing order: Cu-Ce/ZSM-5 > Cu/ZSM-5 > Ce/ZSM-5, indicated by lower ignition, light-off, extinction temperature and broader hysteresis determined via both heating and cooling feeding process. The CO adsorbed on the copper sites to form Cu+–CO complexes, monodentate and bidentate carbonates was considered to be the crucial step for CO catalytic combustion. At the CO concentration ≥ 5 vol.%, the CO self-sustained combustion was achieved over the Cu-Ce/ZSM-5 catalyst. One reason is due to formation of Cu²⁺ ions incorporated into cerium oxides, which are more reducible than the copper clusters, minicrystals and bulk CuO particles. Another reason is attributable to the formation of Ce⁴⁺/Ce³⁺ redox couple, which facilitates oxygen transport on the catalyst surface.

该文章中材料表征采用的是美国麦克仪器AutoChem 2920

详情可参考下面链接：

http://www.sciencedirect.com/science/article/pii/S0926337314004056

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