<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Baltrusaitis, Jonas</style></author><author><style face="normal" font="default" size="100%">Schuttlefield, Jennifer</style></author><author><style face="normal" font="default" size="100%">Zeitler, Elizabeth</style></author><author><style face="normal" font="default" size="100%">Grassian, Vicki H.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Carbon dioxide adsorption on oxide nanoparticle surfaces.</style></title><secondary-title><style face="normal" font="default" size="100%">Chemical Engineering Journal (Amsterdam, Netherlands)</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">carbon dioxide adsorption oxide nanoparticle surface relative humidity water</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2011</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2011///</style></date></pub-dates></dates><publisher><style face="normal" font="default" size="100%">Elsevier B.V.</style></publisher><volume><style face="normal" font="default" size="100%">170</style></volume><pages><style face="normal" font="default" size="100%">471 - 481</style></pages><isbn><style face="normal" font="default" size="100%">1385-8947</style></isbn><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">In this paper, focused on environmental nanotechnol., we review some recent results for carbon dioxide (CO2) adsorption on hydroxylated Fe2O3, γ-Al2O3, and TiO2 nanoparticle surfaces at 296 K as followed by transmission FTIR spectroscopy.  In the absence of water vapor (&lt;1% relative humidity, RH), following exposure to CO2 different species formed on the oxide surface due to the presence of adsorption sites with different basicities.  While the majority surface species on Fe2O3, γ-Al2O3 is detd. to be adsorbed bicarbonate, on TiO2 nanoparticles bidentate carbonate was more prevalent.  A carboxylate species was obsd. on TiO2 nanoparticles under dry conditions as well.  When water is present at 40% RH, the nature of the adsorbed CO2 species changed to that of solvated carbonate formation in the adsorbed water layer.  Obsd. initial adsorption rates were calcd. from time-course expts. under dry conditions and in the presence of 40% RH.  When initial adsorption rates were compared between dry and wet expts., a larger value was found for dry expts. suggesting that CO2 mols. have to compete for adsorption sites with water on these nanoparticle surfaces.  As discussed here, quantum chem. calcns. provide some addnl. insights into CO2 adsorption on hydroxylated metal oxide surfaces in the presence and absence of molecularly adsorbed water. [on SciFinder(R)]</style></abstract><issue><style face="normal" font="default" size="100%">2-3</style></issue><notes><style face="normal" font="default" size="100%">CAPLUS AN 2011:672234(Journal; Online Computer File)</style></notes></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Baltrusaitis, Jonas</style></author><author><style face="normal" font="default" size="100%">Schuttlefield, Jennifer D.</style></author><author><style face="normal" font="default" size="100%">Zeitler, Elizabeth</style></author><author><style face="normal" font="default" size="100%">Jensen, Jan H.</style></author><author><style face="normal" font="default" size="100%">Grassian, Vicki H.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Surface Reactions of Carbon Dioxide at the Adsorbed Water-Oxide Interface.</style></title><secondary-title><style face="normal" font="default" size="100%">J. Phys. Chem. CJournal of Physical Chemistry C</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">surface reaction carbon dioxide adsorbed water oxide interface</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2007</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2007///</style></date></pub-dates></dates><publisher><style face="normal" font="default" size="100%">American Chemical Society</style></publisher><volume><style face="normal" font="default" size="100%">111</style></volume><pages><style face="normal" font="default" size="100%">14870 - 14880</style></pages><isbn><style face="normal" font="default" size="100%">1932-7447</style></isbn><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">In this study, FTIR spectroscopy is used to investigate surface reactions of carbon dioxide at the adsorbed water-oxide interface.  In particular, FTIR spectra following CO2 adsorption in the presence and absence of coadsorbed water on hydroxylated nanoparticulate Fe2O3 and γ-Al2O3 at 296 K are reported.  In the absence of coadsorbed water, CO2 reacts with surface O-H groups to form adsorbed bicarbonate on the surface.  In the presence of coadsorbed water, this reaction is blocked as water hydrogen bonds to the reactive M-OH sites.  Instead, CO2 reacts with adsorbed water to yield adsorbed carbonate and protonated surface hydroxyl groups, M-OH2+, through a proposed carbonic acid intermediate.  The carbonate spectra recorded between 10 and 90% RH are nearly identical to that of carbonate adsorbed on these surfaces in the presence of the liq. water.  FTIR isotope studies show that there is extensive exchange between oxygen in adsorbed water and oxygen atoms in both adsorbed carbonate and gas-phase carbon dioxide.  On the basis of these exptl. results along with quantum chem. calcns., a mechanism is proposed for surface reactions of carbon dioxide at the adsorbed water-oxide interface. [on SciFinder(R)]</style></abstract><issue><style face="normal" font="default" size="100%">40</style></issue><notes><style face="normal" font="default" size="100%">CAPLUS AN 2007:1033025(Journal)</style></notes></record></records></xml>