Interaction of oxygen with three commercial activated carbons (GX203, P1400 and MEED50 supplied by PICA USA Inc., with BET surface areas of 1000, 1150 and 2000 m2/g respectively) is investigated using 9 GHz electron spin resonance (ESR) spectroscopy. All three carbons give a single ESR line with g = 2.0028(3), but the linewidth ΔH and the spin concentration Ns, are strongly affected by exposure to oxygen. The ESR parameters (g, ΔH, Ns) are measured for different partial pressures of oxygen. For the highly evacuated samples, δH ? 1.2 Oe and Ns ? 1019/gm and these results are interpreted in terms of uncompensated surface dangling bonds. Oxygen exposure broadens the line and reduces Ns, in direct relation to the surface areas of the carbons and the effect is reversible. Possible effects of the paramagnetic oxygen on dangling bonds are discussed.
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F. Rodriguez-Reinoso and A. Linares-Solano in Chemistry and Physics of Carbon, Vol. 21 edited by P. A. Thrower (Marcel Dekker, NY 1989) pp 1–146.
M. Smisek and S. Cemy; Active Carbon Manufacture, Properties and Applications (Elsevier, NY 1970). 369
M. S. Dresselhaus, A. W. P. Fung, A. M. Rao, S. L. diVittorio, K. Kuriyama, G. Dresselhaus, and M. Endo, Carbon 30, 1065 (1992).
A. Manivannan, M. Chirila, N. C. Giles and M. S. Seehra, Carbon 37, 1741 (1991).
M. M. Ibrahim and M. S. Seehra, Amer. Chem. Soc. Fuel Chem. Preprints 37, 1131 (1992).
M. S. Seehra and B. Ghosh, J. Anal. Appl. Pyrolysis 13, 209 (1988).
I. C. Lewis and L. S. Singer in Chemistry and Physics of Carbon Vol. 17, edited by P. L. Walker Jr., and P. A. Thrower (Marcel Dekker, NY 1981) pp 1–88.
L. Petrakis and D. W. Grandy in Free Radicals in Coals and Synthetic Fuels (Elsevier, NY, 1983).
H. L. Retcofsky, J. M. Stark and R. A. Friedel, Anal. Chem. 40, 1699 (1968).
M. S. Seehra and M. M. Ibrahim in Catalysis Vol. 12 (The Royal Soc. of Chemistry U.K. 1996) pp 302–320.
B. G. Silbernagel, L. A. Gebhard and G. R. Cyrkacz in Magnetic Resonance: Introduction, Advanced Topics and Applications to Fossil Energy, edited by L. Petrakis and P. Fraissard (D. Reidel Publishing Co., Dordrecht, 1984) pp 645–653.
M. Che and A. J. Tench, Adv. Catal. 32, 1 (1983).
N.-B. Wong, Y. B. Taarit and J. H. Lunsford, J. Chem. Phys. 60, 2148 (1974).
M. Boudart, A. J. Delbouille, E. G. Derouane, V. Indovina and A. B. Walters, J. Am. Chem. Soc. 94, 6622 (1972).
H. C. Foley, M. Stevens, M. Acharya and M. Kane, Mat. Res. Soc. Symp. Proc. (MRS 1997) Vol. 454, pp 3–8.
G. He, R. A. Shankar, M. Chzhan, A. Samouilov, P. Kuppusamy, and J. L. Zweier, Proc. Natl. Acad. Sci. 96, 4586 (1999).
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Manivannan, A., Punnoose, A. & Seehra, M.S. Interaction of Oxygen with Nanophase Carbons Investigated by Electron Spin Resonance Spectroscopy. MRS Online Proceedings Library 593, 365–370 (1999). https://doi.org/10.1557/PROC-593-365