引用本文:
马惠敏, 韩富荣, 胥勃, 吴越. 十二钼磷酸(盐)在H2O2分解反应中的催化作用[J]. 应用化学,
1986, 3(1): 36-40.
Citation: Ma Huimin, Han Furong, Xu Bo, Wu Yue. ON THE CATALYTIC BEHAVIOUR OF 12-MOLYBDOPHOSPHORIC ACID IN THE DECOMPOSITION REACTION OF H2O2[J]. Chinese Journal of Applied Chemistry, 1986, 3(1): 36-40.
Citation: Ma Huimin, Han Furong, Xu Bo, Wu Yue. ON THE CATALYTIC BEHAVIOUR OF 12-MOLYBDOPHOSPHORIC ACID IN THE DECOMPOSITION REACTION OF H2O2[J]. Chinese Journal of Applied Chemistry, 1986, 3(1): 36-40.
十二钼磷酸(盐)在H2O2分解反应中的催化作用
摘要:
实验发现,十二钼磷酸对H2O2分解几乎无活性,而其盐类(Fe3+、Cu2+、Co2+、Mn2+)则都有很好的活性,认为活性种是杂多酸盐的抗衡阳离子。如在杂多酸阴离子中引入V,部份的取代钼,不仅催化剂活性随V的取代数有规律地增加,而且,动力学曲线具有S-型特征,表明反应中活性中心-阴离子中的钒和底物作用生成活性中间体。
English
ON THE CATALYTIC BEHAVIOUR OF 12-MOLYBDOPHOSPHORIC ACID IN THE DECOMPOSITION REACTION OF H2O2
Abstract:
The catalytic behaviour of 12-molybdophospboric acid and its salts in the decomposition reaction of H2O2 has been studied by comparing them with the conventional Fenton reagent.The results showed that 12-molybdophosphoric acid gives only negligible catalytica ctivity, while its salts have the activity comparable to that of the Fenton reagent. It is suggested that the active species were metallic counterions from heteropolyacid salt. The activity of 12-molybdophosphoric acid was markedly affected by substitution of Mo+6 in the polyanion by V+5 and increased regularly with the number of V+5 substituted. For the decomposition reaction of H2O2 by 12-molybdophosphoric acid a S-shaped kinetic curvewas given rather than a parabolic one as in the case of Fenton reagent. The S-shaped curve is characteristic of branch chain reaction and indicates the formation of more active intermediate as a result of the reaction betwcen V+5 in the active center of polyanion and the substracte.
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