Mechanistic Study of the Conversion of Superoxide to Oxygen and Hydrogen Peroxide in Carbon Nanoparticles
Source abstract
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).
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Carbon Nanotubes in Composites · Electrochemical sensors and biosensors · Catalytic Processes in Materials Science
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Hematology, Department of Internal Medicine, University of Texas Houston Medical School, Houston, Texas 77030, United States
Funding
John S. Dunn Foundation · National Institute of Neurological Disorders and Stroke
References (41)
Show source-provided references
1. 10.1016/0002-9343(91)90279-710.1016/0002-9343(91)90279-7 ↗
2. 10.1016/S1367-5931(98)80067-710.1016/S1367-5931(98)80067-7 ↗
3. Bandyopadhyay U. · Curr. Sci. · 1999 · 77 · 658
4. 10.1038/nchembio.60710.1038/nchembio.607 ↗
5. 10.1016/j.cbpa.2004.02.01110.1016/j.cbpa.2004.02.011 ↗
6. 10.1016/S0168-1656(97)01677-510.1016/S0168-1656(97)01677-5 ↗
7. 10.1007/s00018-003-3206-510.1007/s00018-003-3206-5 ↗
8. 10.1021/cr900302x10.1021/cr900302x ↗
9. 10.1021/cr500226n10.1021/cr500226n ↗
10. 10.1021/ac960626110.1021/ac9606261 ↗
11. Zhang X. · 2008
12. Zhang, J.PEM Fuel Cell Electrocatalysts and Catalyst Layers: Fundamentals and Applications;Springer-Verlag London Ltd:London, U.K., 2008; Chapter 2, pp89–135.10.1007/978-1-84800-936-3 ↗
13. 10.1039/c3ee43385d10.1039/c3ee43385d ↗
14. 10.1021/cr500356310.1021/cr5003563 ↗
15. Boulatov R. · 2009 · 63710.1002/9780470463772.ch18 ↗
16. 10.1134/S102319350709012110.1134/S1023193507090121 ↗
17. 10.1021/ic00005a05110.1021/ic00005a051 ↗
18. 10.1021/ja063283p10.1021/ja063283p ↗
19. 10.1021/ja805721p10.1021/ja805721p ↗
20. 10.1021/nn100975c10.1021/nn100975c ↗
21. 10.1021/nn204885f10.1021/nn204885f ↗
22. 10.1021/nn302615f10.1021/nn302615f ↗
23. 10.1016/j.tibtech.2014.08.00510.1016/j.tibtech.2014.08.005 ↗
24. 10.1021/cm503750210.1021/cm5037502 ↗
25. 10.1021/nn504637y10.1021/nn504637y ↗
26. 10.1002/adma.20120232110.1002/adma.201202321 ↗
27. 10.1073/pnas.141704711210.1073/pnas.1417047112 ↗
28. 10.1021/ar00072a00510.1021/ar00072a005 ↗
29. 10.1021/ar700256a10.1021/ar700256a ↗
30. 10.1073/pnas.16209559910.1073/pnas.162095599 ↗
31. 10.1021/nn100636810.1021/nn1006368 ↗
32. 10.1002/chem.20130188910.1002/chem.201301889 ↗
33. 10.1002/cber.1898031023710.1002/cber.18980310237 ↗
34. 10.1002/zaac.1937234040510.1002/zaac.19372340405 ↗
35. 10.1021/ja01539a01710.1021/ja01539a017 ↗
36. 10.1021/jp111941s10.1021/jp111941s ↗
37. 10.1016/j.carbon.2011.04.04710.1016/j.carbon.2011.04.047 ↗
38. Sawyer D. T. · 1991
39. 10.1021/ja053911n10.1021/ja053911n ↗
40. 10.1021/ac101854w10.1021/ac101854w ↗
41. 10.1002/1521-4109(200202)14:3<165::AID-ELAN165>3.0.CO;2-610.1002/1521-4109(200202)14:3<165::AID-ELAN165>3.0.CO;2-6 ↗