CATALYTIC DECOMPOSITION OF HYDROGEN PEROXIDE BY METALS AND ALLOYS OF PLATINUM GROUP
CATALYTIC DECOMPOSITION OF HYDROGEN PEROXIDE BY METALS AND ALLOYS OF PLATINUM GROUP
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DOI：
10.1016/0021-9517(69)90326-1
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发表时间：
1969-01-01
影响因子：
7.3
通讯作者：
MCKEE, DW
中科院分区：
文献类型：
--
作者：
MCKEE, DW
稀过氧化氢水溶液的催化分解已经在一些VIII族金属和二元合金上进行了研究，包括钯-金。在27 °下测量作为催化剂组成和溶液pH的函数的动力学。在中性溶液中，第VIII 3族金属的比活度一般大于第VIII 2族金属，比活度（单位表面积）大小顺序为Pt > Os > Ir > Pd > Ru > Rh。Pt <$Pd、Pt <$Ru和Pt <$Rh的合金显示出介于组成金属之间的活性。Pt <$Ir和Pd <$Au的合金在中间合金组合物中表现出最大活性。的动力学强烈依赖于溶液的pH值，在10-11的pH值的速率上升到一个尖锐的最大值，根据自由基链机制的分解。
The catalytic decomposition of dilute aqueous solutions of hydrogen peroxide has been studied on a number of Group VIII metals and binary alloys, including palladium-gold. The kinetics were measured at 27 ° as a function of catalyst composition and pH of the solution. In neutral solution, the activity of the individual metals of Group VIII3was generally greater than those of Group VIII2, the order of specific activity (per unit surface area) decreasing in the sequence Pt > Os > Ir > Pd > Ru > Rh. Alloys of PtPd, PtRu and PtRh showed activities intermediate between those of the constituent metals. Alloys of PtIr and PdAu exhibited maximum activities at intermediate alloy compositions. The kinetics depended strongly on the pH of the solutions, the rate rising to a sharp maximum at pH values of 10–11, in accordance with the radical-chain mechanism for the decomposition.