The mechanism of electrochemical reduction of hydrogen peroxide on silver nanoparticles. Issue 3 (20th December 2017)

• Record Type: Journal Article
• Authors: Cai, Xiaosheng; Tanner, Eden E. L.; Lin, Chuhong; Ngamchuea, Kamonwad; Foord, John S.; Compton, Richard G.
• Is Part Of: Physical chemistry chemical physics. Volume 20:Issue 3(2017)
• Page Start: 1608
• Page End: 1614
• Publication Date: 2017-12-20
• Subjects: Chemistry, Physical and theoretical -- Periodicals; 541.3
• DOI: 10.1039/c7cp07492a
• Languages: English
• ISSNs: 1463-9076

Abstract

Abstract : Reduction of hydrogen peroxide on silver nanoparticle modified electrodes in the neutral solution proceeds through a CE mechanism. Abstract : 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.