论文部分内容阅读
以柠檬酸络合法制备了CuCrO2 和CuCr2 O4 两相共生的Cu Cr O催化剂体系 .由于两相共生而相互作用 ,两相组成的样品中 ,样品颗粒较小 ,比表面积增大 ,催化CO O2 反应的活性提高 .当样品中n(Cu) /n(Cr) =0 7时 ,两相含量最为接近 ,显示出最高的催化活性 .CO O2 反应过程中 ,气相中的CO与样品表面的氧原子作用 .在两相共生而相互作用的过程中 ,CuCrO2和CuCr2 O4 的体相结构没有变化 .各样品催化活性的不同是由其表面性质的差异引起的 .TPR和XPS分析结果表明 :两相共生而相互作用 ,修饰了样品的表面性质 ,使样品表面含有更多的活性氧 ,提高了样品的催化活性
CuCuO and CuCr2O4 co-existed CuCuO catalyst systems were prepared by citric acid complexation method. Due to the synergistic interaction of the two phases, the sample particles in the two phases were smaller and the specific surface area increased. The reaction activity increases.When the sample n (Cu) / n (Cr) = 0 7, the two phase content is the closest, showing the highest catalytic activity.CO 2 reaction process, the CO in the gas phase and the sample surface oxygen At the same time, the phase structure of CuCrO 2 and CuCr 2 O 4 did not change during the synergistic interaction of two phases.The differences of catalytic activity of CuCrO 2 and CuCr 2 O 4 were caused by the difference of their surface properties.The results of TPR and XPS showed that the two phases Symbiosis and interaction, modified the surface properties of the sample, the sample surface contains more reactive oxygen species, increased the catalytic activity of the sample