Characterisation and application of a novel cell for mechanistic electrochemistry at elevated temperatures

Journal article

A novel high temperature cell capable of measuring electrochemical signals up to temperatures of 115°C is reported. Characterisation of the cell has been undertaken by examining three differing systems. First the voltammetric response of a range of simple redox systems in both aqueous and non-aqueous media was recorded in order to deduce the activation energies for diffusion of these molecules. Next the steady state linear sweep voltammetric response of N,N,N′,N′-tetramethyl-p-phenylenediamine (TMPD) in dimethyl sulfoxide (DMSO) is assessed as a means of studying an inferred structural change of the solvent at elevated temperatures. A change in the activation energy for diffusion from 13 kJ mol-1 to 27 kJ mol-1 was observed as the temperature was raised. Finally, the electrochemically catalysed reaction of the radical cation TMPD+ with ascorbic acid is studied from 25°C to 107°C; the corresponding kinetic parameters are deduced.

Authors: Wildgoose, G; Lawrence, N; Coles, B; Jiang, L; Jones, T

• Publication status: Published
• Journal: PHYSICAL CHEMISTRY CHEMICAL PHYSICS
• Volume: 5
• Issue: 19
• Pages: 4219-4225
• Publication date: 2003-10-01
• DOI: 10.1039/b307900g
• EISSN: 1463-9084
• ISSN: 1463-9076
• Language: English