以铜修饰氰桥配位聚合物复合玻碳电极（Cu CME）为工作电极,利用阴极溶出伏安法检测H2O2。实验结果证明,该复合修饰电极是对H2O2有较好的感应,检测H2O2有较明显的峰形,操作简单快捷。在最佳的实验条件下,H2O2的峰电流值和其浓度在0.5-16...以铜修饰氰桥配位聚合物复合玻碳电极（Cu CME）为工作电极,利用阴极溶出伏安法检测H2O2。实验结果证明,该复合修饰电极是对H2O2有较好的感应,检测H2O2有较明显的峰形,操作简单快捷。在最佳的实验条件下,H2O2的峰电流值和其浓度在0.5-160 m M的范围内呈双对数的线性关系,线性相关系数达到0.9986。此外,该复合修饰电极在灵敏度,重现性和稳定性等方面都有很好的性能。展开更多
Twelve samples of Co-Cu/AI2O3 were prepared by impregnating AI2O3 with cobalt salt followed by copper salt or vice versa. The composition of the prepared samples varied in the molar ratios 1:1, 1:2 and 1:3 with respec...Twelve samples of Co-Cu/AI2O3 were prepared by impregnating AI2O3 with cobalt salt followed by copper salt or vice versa. The composition of the prepared samples varied in the molar ratios 1:1, 1:2 and 1:3 with respect to CuO.CoO or CoO:CuO, while Al2O3 content was kept at about 13-15 mol. The prepared solids were calcined at different temperatures and the products were characterized by means of XRD-analysis. The catalytic activity of the calcined solids was tested in H2O2 decomposition. The XRD-analysis revealed that the sequence of impregnation affects much the structure of the samples. The loading of alumina with cobalt followed by copper salts produced sample with structure differs from that for sample firstly treated with copper followed by cobalt salts. XRD- analysis showed the formation of crystalline spinel Co1-x Cux AI2O4 with nearly the same crystal structure as CoAI2O4 even with high copper content. The examination of catalytic activity of these samples showed that catalysts with Co-loaded over Cu were more active than catalysts with Cu loaded over Co. In all cases the double oxides loaded over AI2O3 were more active than the single oxide over AI2O3.展开更多
文摘以铜修饰氰桥配位聚合物复合玻碳电极（Cu CME）为工作电极,利用阴极溶出伏安法检测H2O2。实验结果证明,该复合修饰电极是对H2O2有较好的感应,检测H2O2有较明显的峰形,操作简单快捷。在最佳的实验条件下,H2O2的峰电流值和其浓度在0.5-160 m M的范围内呈双对数的线性关系,线性相关系数达到0.9986。此外,该复合修饰电极在灵敏度,重现性和稳定性等方面都有很好的性能。
文摘Twelve samples of Co-Cu/AI2O3 were prepared by impregnating AI2O3 with cobalt salt followed by copper salt or vice versa. The composition of the prepared samples varied in the molar ratios 1:1, 1:2 and 1:3 with respect to CuO.CoO or CoO:CuO, while Al2O3 content was kept at about 13-15 mol. The prepared solids were calcined at different temperatures and the products were characterized by means of XRD-analysis. The catalytic activity of the calcined solids was tested in H2O2 decomposition. The XRD-analysis revealed that the sequence of impregnation affects much the structure of the samples. The loading of alumina with cobalt followed by copper salts produced sample with structure differs from that for sample firstly treated with copper followed by cobalt salts. XRD- analysis showed the formation of crystalline spinel Co1-x Cux AI2O4 with nearly the same crystal structure as CoAI2O4 even with high copper content. The examination of catalytic activity of these samples showed that catalysts with Co-loaded over Cu were more active than catalysts with Cu loaded over Co. In all cases the double oxides loaded over AI2O3 were more active than the single oxide over AI2O3.
