Platinum electronic structure

Bismuth has traditionally been considered a purely third body-(ensemble) type modifier [67] that exerts little influence on the platinum electronic structure, whereas... 

Determination of the Atomic and Electronic Structure of Platinum Catalysts by X-ray Absorption Spectroscopy... 

Theileis, V. and Bross, H. (2000) Relativistic modified augmented plane wave method and its application to the electronic structure of gold and platinum. Physical Review B - Condensed Matter, 62, 13338-13346. 

In the electron transfer theories discussed so far, the metal has been treated as a structureless donor or acceptor of electrons—its electronic structure has not been considered. Mathematically, this view is expressed in the wide band approximation, in which A is considered as independent of the electronic energy e. For the. sp-metals, which near the Fermi level have just a wide, stmctureless band composed of. s- and p-states, this approximation is justified. However, these metals are generally bad catalysts for example, the hydrogen oxidation reaction proceeds very slowly on all. sp-metals, but rapidly on transition metals such as platinum and palladium [Trasatti, 1977]. Therefore, a theory of electrocatalysis must abandon the wide band approximation, and take account of the details of the electronic structure of the metal near the Fermi level [Santos and Schmickler, 2007a, b, c Santos and Schmickler, 2006]. 

Interestingly, the one-electron reduced, yellow-green, species [Pt4(NH3)8(C5H4N0)4](N03)4 was also structurally characterized. The tetracation has a geometry essentially identical to that of the pentacation, the main structural variation being a significant increase of the Pt-Pt distances (Ptl-Pt2 = 2.88 A Pt2-Pt3 = 3.13 A), which agrees with the electronic structure Ptn-Ptn—Ptn—Ptn (or, formal oxidation state of each platinum atom +2.00).16... 

There are three kinds of electronic structures that may be expected for the octahedral complexes MXfl of the iron-group transition elements (and also for those of the palladium and platinum groups). -... 

A theoretical approach addresses the question of alkynes bonded to PtL2 fragments in both parallel and perpendicular geometries. With each mode of alkyne coordination there is required a different coordination geometry at platinum. The authors use the isolobal analogy to calculate the electronic structures of complexes, and propose several unknown complexes to be stable.842... 

An exact interpretation of the basic reasons for the effect of the carrier on the structure of chemisorbed CO cannot yet be advanced. Qualitatively it appears that the alumina makes it easier for the platinum to provide electrons for bonding between the CO and the surface. This is based on a comparison of several possible electronic structures of the chemisorbed CO. The bond between the surface and the carbon of the linear CO could be either a double or a single bond,... 

In the preceding sections, a number of specific instances have been reviewed in which the absorption spectra of platinum group complexes have provided information concerning the chemical behavior of the systems and the electronic structure and bonding in the compounds. Some... 

---