In situ laser activation of glassy carbon electrodes

Journal Article · Sat Nov 01 04:00:00 EST 1986 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac00126a036· OSTI ID:5142493

Poon, M; McCreery, R L

Laser pulses of short duration (10 ns) and high intensity (20 MW cm/sup -2/) can increase the rate of heterogeneous electron transfer at a glassy carbon electrode by 1-3 orders of magnitude. The laser pulse may be delivered in situ, directly in the solution of interest, repeatedly if desired. The heterogeneous electron transfer rate constant, k/sup 0/, for the ferri-/ferrocyanide redox system increases from 0.004 to 0.20 cm s/sup -1/ with laser activation, resulting in the highest k/sup 0/ yet observed for this system on glassy carbon. Laser activation results in minor morphological changes to the surface, as observed by scanning electron microscopy, mainly removal of an apparent layer of carbon microparticles. The technique holds promise as a means to repeatedly activate glassy carbon electrodes in situ, thus circumventing the need for renewal or reactivation by polishing or other ex situ treatments.

• Research Organization: Ohio State Univ., Columbus
• OSTI ID: 5142493
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 58:13; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
AMINES
AROMATICS
ASCORBIC ACID
AUTONOMIC NERVOUS SYSTEM AGENTS
CARBON
CARDIOTONICS
CARDIOVASCULAR AGENTS
CATALYSIS
CATECHOLAMINES
CHEMICAL ACTIVATION
CHEMICAL ANALYSIS
CHEMICAL REACTION KINETICS
CONVERSION
CYANIDES
DATA
DOPAMINE
DRUGS
ELECTRODES
ELECTRON MICROSCOPY
ELECTRON TRANSFER
ELEMENTS
ENERGY CONVERSION
EXPERIMENTAL DATA
GLASS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INFORMATION
INORGANIC ACIDS
IRON COMPOUNDS
KINETICS
LASERS
MICROSCOPY
NEODYMIUM LASERS
NEUROREGULATORS
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PHENOLS
POLYPHENOLS
PULSES
QUANTITATIVE CHEMICAL ANALYSIS
QUINONES
REACTION KINETICS
SCANNING ELECTRON MICROSCOPY
SOLID STATE LASERS
SULFURIC ACID
SYMPATHOMIMETICS
TRANSITION ELEMENT COMPOUNDS
VITAMINS
VOLTAMETRY