Title

Sedentarism: The Effects Of Internet Use On Human Obesity In The United States

Abstract

I present here results of first principles studies of the adsorption energetics of the intermediates of the oxygen electroreduction reaction (ORR) on a Se-modified Ru(0001) surface. The calculations were performed for 1/3 and 2/3 monolayer coverage of Se, as well as for clean Ru(0001) as a reference. The binding energies of O and OH on Ru(0001) are found to decrease significantly with the presence of Se, and this effect increases with the Se coverage. The Se surface modification is found not to change the Ru local density of electronic states noticeably. However, Se atoms accept electronic charge from the surface and thus become negatively charged. As a result, they repeal electrostatically the adsorbed negatively charged O and OH intermediates and in this way reduce their binding energies. This effect provides an alternative way of tuning the reactivity of the catalyst surfaces. Since for the Ru case reduction of the O and OH binding energies makes ORR energetically favorable, Se modification dramatically improves the ORR rate on Ru. Adsorption of O 2 and coadsorption of the ORR intermediates and water have also been studied. The effect of coadsorption on the binding energies of O and OH are discussed. © 2012 American Chemical Society.

Publication Date

3-29-2012

Publication Title

Social Work in Public Health

Volume

27

Issue

12

Number of Pages

250-269

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1080/19371918.2011.542998

Socpus ID

84859757652 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84859757652

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