歧化
过氧化氢
电化学
循环伏安法
化学
氧气
伏安法
氢
光化学
无机化学
催化作用
电极
有机化学
物理化学
作者
Xiaosheng Cai,Eden E. L. Tanner,Chin E. Lin,Kamonwad Ngamchuea,John S. Foord,Richard G. Compton
摘要
The reduction of hydrogen peroxide on a silver nanoparticle modified boron doped diamond electrode in a neutral solution is shown to proceed through a CE mechanism. Hydrogen peroxide undergoes a disproportionation reaction to form oxygen (and water) on the silver surface, creating a diffusion layer of oxygen, which, at a sufficiently biased electrode, is then reduced to hydrogen peroxide. Voltammetry and a full mechanistic simulation are undertaken to confirm the mechanism, showing at short times a dependence of the reductive signal on waiting time prior to voltammetric analysis reflecting the extent of the disproportionation step which occurs prior to voltammetric analysis.
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