5.64 Chemical Message
The structure defects of graphite play a determinant catalytic role in the oxygen
reduction. They in fact govern the activation energy of the transformation of O 2 to
its reduced forms O 2
− O 2
2− O
2− . Several catalytic processes may take profit from
this result, both chemical and biochemical.
5.65 The Case of Persistent Free Radicals
in the Atmosphere
Combustion and thermal processes are dominant sources of air pollution and produce toxic products, specially particulate matter (PM), polycyclic aromatic
hydrocarbons, and environmentally persistent free radicals (EPFRs) [32]. These
later generate DNA damage and induce pulmonary dysfunction. EPFRs on PM are
formed through interaction of aromatic compounds with transition metal oxides via
Fig. 5.65 ESR spectra of the indicated samples, under the reported experimental conditions [31]
156
5 The Symmetry Properties Describe the Electronic Structure …
The structure defects of graphite play a determinant catalytic role in the oxygen
reduction. They in fact govern the activation energy of the transformation of O 2 to
its reduced forms O 2
− O 2
2− O
2− . Several catalytic processes may take profit from
this result, both chemical and biochemical.
5.65 The Case of Persistent Free Radicals
in the Atmosphere
Combustion and thermal processes are dominant sources of air pollution and produce toxic products, specially particulate matter (PM), polycyclic aromatic
hydrocarbons, and environmentally persistent free radicals (EPFRs) [32]. These
later generate DNA damage and induce pulmonary dysfunction. EPFRs on PM are
formed through interaction of aromatic compounds with transition metal oxides via
Fig. 5.65 ESR spectra of the indicated samples, under the reported experimental conditions [31]
156
5 The Symmetry Properties Describe the Electronic Structure …