In a computational study we addressed the adsorption of uranyl UO(2)(2+) on solvated (110) and (010) edge surfaces of pyrophyllite, applying a density functional approach to periodic slab models. We explored bidentate adsorption complexes on various partially deprotonated adsorption sites: octahedral Al(O,OH), tetrahedral Si(O,OH), and mixed AlO-SiO. Aluminol sites were determined to be most fa...

A water oxidation catalyst generated via electrodeposition from aqueous solutions containing phosphate and Co(2+) (Co-Pi) has been studied by in situ X-ray absorption spectroscopy. Spectra were obtained for Co-Pi films of two different thicknesses at an applied potential supporting water oxidation catalysis and at open circuit. Extended X-ray absorption fine structure (EXAFS) spectra indicate t...

[Pt15(CO)30]2was synthesized by reductive carbonylation of HzPtCls in the channels of FSM-16 modified with NEt4CI. The platinum clusters in the channels whose diameter was 28 A were characterized by Pt edge EXAFS as well as FT-IR. UV-vis spectroscopy, and TEM measurements. After exposure of H2PtCldNEt&VFSM-16 to CO + H20 at 323 K, Pt carbonyl clusters were selectively produced. The Pt Lm edge E...

Cesium adsorption on the clay minerals vermiculite and montmorillonite is described as a function of surface coverage using extended X-ray adsorption fine structure spectroscopy (EXAFS). Cesium (Cs) possessed a variable coordination environment consisting of Cs-O distances between 3.2 and 4.3 A; however, disorder typical of the Cs coordination environments prevented the resolution of all oxygen...