Gas sensing using edge-plane pyrolytic-graphite electrodes: electrochemical reduction of chlorine

Lowe, Eleanor R.; Banks, Craig E.; Compton, Richard G.
June 2005
Analytical & Bioanalytical Chemistry;Jun2005, Vol. 382 Issue 4, p1169
Academic Journal
The voltammetric responses of chlorine in aqueous acid solutions have been explored using different carbon-based electrodes. Edge-plane pyrolytic graphite has more electrochemical reversibility than glassy carbon, basal-plane pyrolytic graphite, or boron-doped diamond electrodes. A significant reduction in the overpotential is observed on the edge-plane pyrolytic-graphite electrode in contrast with the other carbon-based electrode substrates. These results suggest that edge-plane pyrolytic graphite can be optimally used as the working electrodes in Clark-cell devices for low-potential amperometric gas sensing of Cl2.


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