Mechanistic Study of the Conversion of Superoxide to Oxygen and Hydrogen Peroxide in Carbon Nanoparticles.

abstract

• Hydrophilic carbon clusters (HCCs) are oxidized carbon nanoparticles with a high affinity for electrons. The electron accepting strength of HCCs, employing the efficient conversion of superoxide (O2(-)) to molecular oxygen (O2) via single-electron oxidation, was monitored using cyclic voltammetry and electron paramagnetic resonance spectroscopy. We found that HCCs possess O2 reduction reaction (ORR) capabilities through a two-electron process with the formation of H2O2. By comparing results from aprotic solvents to those obtained from ORR activity in aqueous media, we propose a mechanism for the origin of the antioxidant and superoxide dismutase mimetic properties of poly(ethylene glycolated) hydrophilic carbon clusters (PEG-HCCs).

authors

• Kent, Thomas

published proceedings

• ACS Appl Mater Interfaces

author list (cited authors)

• Jalilov, A. S., Zhang, C., Samuel, E., Sikkema, W., Wu, G., Berka, V., ... Tour, J. M.

citation count

• 34

complete list of authors

• Jalilov, Almaz S||Zhang, Chenhao||Samuel, Errol LG||Sikkema, William KA||Wu, Gang||Berka, Vladimir||Kent, Thomas A||Tsai, Ah-Lim||Tour, James M

publication date

• June 2016

publisher

• American Chemical Society (ACS)  Publisher

published in

• ACS Applied Materials & Interfaces  Journal

keywords

• Antioxidant
• Carbon Nanoparticles
• Oxidation
• Oxygen Reduction
• Superoxide

PubMed Central ID

• 27245481

Digital Object Identifier (DOI)

• 10.1021/acsami.6b03502

start page

• 15086

end page

• 15092

volume

• 8

issue

• 24

URL

• http://dx.doi.org/10.1021/acsami.6b03502