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研究了2:18磷钼杂多酸(盐)(Dawson结构)对H_2O_2分解反应的催化行为。实验结果表明,H_6(P_2Mo_(18)O_(62))和1:12磷钼杂多酸H_3(PMo_(12)O_(40))相同,对H_2O_2分解无活性,而其盐类(Fe~(3+)、Cu~(2+))则有很好的催化活性,但对H_2O_2分解的动力学行为不同于1:12磷钼杂多酸盐,符合二级动力学反应关系式。这可能和这两种结构中抗衡阳离子所处环境不同有关。杂多酸阴离子中引入V,部份取代钼后所得实验结果与1:12磷钼钒杂多酸完全相同,表明引入的钒离子在两种结构中不仅有相同的环境而且是催化剂的活性种。
The catalytic behavior of 2:18 phosphomolybdic acid (salt) (Dawson structure) on the decomposition of H_2O_2 was studied. The experimental results showed that H_6 (P_2Mo_ (18) O_ (62)) was the same as PMo_ (12) O_ (40) 1:12 and had no activity on H_2O_2 decomposition, (3 +), Cu 2+) have good catalytic activity, but the kinetic behavior of H 2 O 2 decomposition is different from 1:12 phosphomolybdic acid heteropolyacid salt, which is in accordance with the second-order kinetic reaction. This may be related to the differences in the environment in which the counterions are located in the two structures. The introduction of V into the heteropolyacid anion and the partial substitution of molybdenum gave the same experimental results as 1:12 phosphomolybdovanadophosphoric acid, indicating that the introduced vanadium ions not only have the same environment but also the active species of the catalyst in both structures .