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Catalytic Single-Particle Nano-Impacts: Theory and Experiment. Poly(vinylferrocene)-Modified Graphene Nanoplatelet Mediated l‑Cysteine Oxidation

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journal contribution
posted on 17.08.2016, 00:00 by Qianqi Lin, Chuhong Lin, Haoyu Wu, Christopher Batchelor-McAuley, Richard G. Compton
The theory of catalytic nano-impacts is developed specifically for the case of a single particle in contact with an electrode for a short period of time in which it mediates electron transfer to or from a species in homogeneous solution. The theory is applied to impacts of chemically modified graphene nanoplatelets in which the immobilized ferrocene/ferrocenium couple is used to mediate the oxidation of l-cysteine in aqueous solution. Theory and experiment are in good agreement, and the catalytic rate constant is found to be (2.4 ± 1.2) × 103 M–1 s–1.