O(sub 2) reduction on graphite and nitrogen-doped graphite: Experiment and theory

Article Abstract:

An experimental and theoretical study of electroreduction of oxygen to hydrogen peroxide on graphite and nitrogen-doped graphite was conducted. The quantum calculations on cluster models of nitrided and non-nitrited groups show that carbon radical sites, formed adjacent on substitutional nitrogen in graphite are active for O(sub 2) electroreduction to H(sub 2)O(sub 2) through and adsorbed OOH medium.

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Reactions of biological with selenourea: Formation of redox active nanoselnium

Article Abstract:

Reactions of biological agents such as hydroxyl radicals (OH), singlet oxygen (O2), hydrogen peroxide (H2O2), and peroxynitrite (ONOO(sup-)) with selenourea are studied. The studies demonstrate that selenourea undergoes oxidation with both one-electron and two-electrons oxidants to produce elemental aelenium, which on stabilization to nanometer size, exhibits size-dependent redox activity.

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Selective oxidation of semiconducting single-wall carbon nanotubes by hydrogen peroxide

Article Abstract:

Selective oxidation of single-wall carbon nanotubes (SWCNTs) by H2O2 was conducted at varying heating times. This process was monitored by UV-vis-NIR spectroscopy resulting in a major increase in the relative absorption intensity that indicated a higher than 80% concentration of metallic SWCNTs in the final product.

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