The catalytic activity measurement for the NO+CO reaction over CuO/CeO\-2/\%γ\%\|Al\-2O\-3 catalysts at a low\|temperature(200 ℃) shows that the activity is strongly related to ceria loading amount, and both surface...The catalytic activity measurement for the NO+CO reaction over CuO/CeO\-2/\%γ\%\|Al\-2O\-3 catalysts at a low\|temperature(200 ℃) shows that the activity is strongly related to ceria loading amount, and both surface dispersed ceria species and crystalline CeO\-2 shows a significant enhancement on the activity. The effect of ceria species is contributed to their promoting the reduction of copper oxide species.展开更多
Copper(Ⅱ) oxides powder catalysts were prepared by three different methods,thermal decomposition,solid phase reaction and chemical precipitation.The phase,surface structure,morphology,particle size and catalytic acti...Copper(Ⅱ) oxides powder catalysts were prepared by three different methods,thermal decomposition,solid phase reaction and chemical precipitation.The phase,surface structure,morphology,particle size and catalytic activity of the powder for H 2O 2 decomposition were investigated by XRD,SEM,FT IR and the surface area measurement techniques.These studies revealed that high low sequence of catalytic activity of powder prepared by three different methods is opposite from their surface area,and that catalytic activity of the powder is principally related to its surface structure and active compositions.展开更多
文摘The catalytic activity measurement for the NO+CO reaction over CuO/CeO\-2/\%γ\%\|Al\-2O\-3 catalysts at a low\|temperature(200 ℃) shows that the activity is strongly related to ceria loading amount, and both surface dispersed ceria species and crystalline CeO\-2 shows a significant enhancement on the activity. The effect of ceria species is contributed to their promoting the reduction of copper oxide species.
文摘利用机械混合及化学复合两种混合方式制备出用于微生物燃料电池(MFC)阴极的Mn O_2与活性炭导电材料的混合催化剂,混合质量比分别为1∶3,1∶1和3∶1。将以各催化剂制作的碳布阴极置于空气阴极MFC中运行,利用线性扫描伏安法测试碳布阴极的性能。研究表明,两种混合催化剂均在混合质量比为1∶1时具有最佳性能;化学复合催化剂MFC的最大功率密度达到336 m W/m^2,是单纯使用Mn O_2粉末时的2.51倍,优于机械混合的催化剂。
文摘Copper(Ⅱ) oxides powder catalysts were prepared by three different methods,thermal decomposition,solid phase reaction and chemical precipitation.The phase,surface structure,morphology,particle size and catalytic activity of the powder for H 2O 2 decomposition were investigated by XRD,SEM,FT IR and the surface area measurement techniques.These studies revealed that high low sequence of catalytic activity of powder prepared by three different methods is opposite from their surface area,and that catalytic activity of the powder is principally related to its surface structure and active compositions.
