Carbon aerogel composite electrodes

Journal Article · Wed Sep 01 04:00:00 EDT 1993 · Analytical Chemistry (Washington); (United States)

DOI:https://doi.org/10.1021/ac00065a022· OSTI ID:5620277

Wang, J; Angnes, L; Tobias, H ^[1]; Roesner, R A; Hong, K C; Glass, R S; Kong, F M; Pekala, R W ^[2]

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1. New Mexico State Univ., Las Cruces, NM (United States)
2. Lawrence Livermore National Lab., CA (United States)

The electrochemical behavior and analytical performance of new vitreous carbon aerogel composite electrodes are described. These new composite electrodes rely on the unique open-cell nanostructure of aerogel materials, including their interconnected porosity, ultrafine pore sizes (<50 nm), and huge surface area. Transmission and scanning electron microscopies are used to shed useful insights into the carbon network. The enhanced diffusional flux results in a sigmoidal voltammetric response and nonlinear i vs t[sup [minus]1/2] chronoamperometric plots. The potential window is broad, and the background currents are low. Square-wave anodic stripping voltammetry at the mercury-coated carbon aerogel composite electrode is demonstrated for the quantitation of trace metals at the microgram per liter level using short deposition periods. These carbon aerogels and other aerogels present new opportunities for a wide range of electrode materials. 15 refs., 6 figs.

• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5620277
• Journal Information: Analytical Chemistry (Washington); (United States), Journal Name: Analytical Chemistry (Washington); (United States) Vol. 65:17; ISSN 0003-2700; ISSN ANCHAM
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360601 -- Other Materials-- Preparation &amp; Manufacture
360602 -- Other Materials-- Structure &amp; Phase Studies
360606 -- Other Materials-- Physical Properties-- (1992-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400* -- Electrochemistry
CARBON
CHEMICAL ANALYSIS
CHEMISTRY
COLLOIDS
COMPOSITE MATERIALS
DISPERSIONS
ELECTROCHEMISTRY
ELECTRODES
ELECTRON MICROSCOPY
ELEMENTS
EVALUATION
GELS
MATERIALS
MERCURY
METALS
MICROSCOPY
NONMETALS
POROSITY
VOLTAMETRY