Microwave enhanced electrochemistry: mass transport effects and steady state voltammetry in the sub-millisecond time domain

Thermoelectrochemistry as a branch of electrochemistry like photoelectrochemistry is reviewed in an integral treatment of the subject. Especially modern thermoelectrochemistry is focused on new techniques to vary the temperature as an independent variable. This review based on a definition of modern thermoelectrochemistry includes all the classical work which contributes to the formation of modern thermoelectrochemistry, among them high-temperature electrochemistry, subcritical- and supercritical electrochemistry and in-situ electrochemical calorimetry. The main focus is on modern techniques like fast electrode heating by lasers or by alternating current as well as on heating of solution spots by microwaves and related methods. Here the state of the art in modern thermoelectrochemistry is critically reviewed for the first time.

show abstract

Microwave Activation of Electrochemical Processes at Glassy Carbon and Boron‐Doped Diamond Electrodes

Sur

Marken

Seager

et al. 2005

Electroanalysis

View full text Add to dashboard Cite

Voltammetric experiments under intense microwave field conditions have been carried out at a carbon microfiber electrode, an array of carbon microfiber electrodes, and at a boron-doped diamond electrode. For the reversible one electron redox systems Fe(CN) 3À=4À 6 and Ru(NH 3 ) 3þ=2þ 6 in aqueous KCl solution increased currents (up to 16 fold at a 33 mm diameter carbon microelectrode) and superheating (up to ca. 400 K at all types of electrodes) are observed. Electrodes with smaller diameter allow better signal enhancements to be achieved. From the missing effect of the supporting electrolyte concentration on the microwave enhanced currents, it can be concluded that effects observed at carbon electrodes (microwave absorbers) are due to the interaction of microwaves with the electrode material whereas for metal electrodes (microwave conductors) effects are dominated by the interaction of the microwaves with the aqueous dielectric. Short heat pulses can be applied by pulsing the microwave field and relatively fast temperature transients are observed for small electrodes. For the irreversible two electron oxidation of l-dopa in aqueous phosphate buffer, different types of effects are observed at glassy carbon and at boron-doped diamond. Arrays of carbon microfibers give the most reproducible and analytically useful current signal enhancements in the presence of microwaves.

show abstract

Microwave enhanced electrochemistry: mass transport effects and steady state voltammetry in the sub-millisecond time domain

Cited by 12 publications

References 27 publications

Microwaves and Electrochemistry

Microwaves and Electrochemistry

Modern Thermoelectrochemistry

Microwave Activation of Electrochemical Processes at Glassy Carbon and Boron‐Doped Diamond Electrodes

Contact Info

Product

Resources

About