Adsorption and Decomposition of Ru₃(CO)₉(CH₃CN)₃ at Platinum Surfaces:  An X-ray Photoelectron Spectroscopy and Fourier Transform-Infrared Spectroscopy Study

Abstract

A CH3CN-modified triruthenium carbonyl cluster, Ru3(CO)9(CH3CN)3 (I), has been adsorbed on platinum and platinum oxide surfaces from dichloromethane solutions. The modified surface has been characterized by X-ray photoelectron spectroscopy (XPS) and polarized grazing angle Fourier transform-infrared (FT-IR) microscopy. The proposed mechanism for the adsorption of I involves the chemisorption of the metal cluster at the platinum surface by losing the acetonitrile ligand. The original cluster, Ru3(CO)12, could not be adsorbed under the same experimental conditions used for cluster I. The cluster-modified surface was treated with hydrogen for the reduction of the cluster to its metallic state on the Pt surface. This was done at different temperatures. The XPS results show the formation of a complex Ru−RuO2−RuO3/Pt surface.

Effect of solvent on Se-modified ruthenium/carbon catalyst for oxygen reduction

“…The binding energy value was 280.1 eV, which could be ascribed to the Ru(0) species in accordance with the literature [13]. The banding energy appeared at 281.7 eV could be interpreted as a metal organic phase according to a work published by Fachini and Cabrera studying ruthenium complexes [14]. Nearly symmetrical peaks shown at about 285.0 eV were corresponding to C 1s [15].…”

Pt and Pd Nanoparticles Immobilized on Amine-Functionalized Zeolite: Excellent Catalysts for Hydrogenation and Heck Reactions

“…The general scan spectra of the previous samples showed the presence of C 1s, N 1s, Cl 2p, Pt 4f, and Pd 3d core levels with no evidence of impurities. In Figure A, the Pt 4f spectrum could be resolved into two spin−orbit pairs (spin−orbit splitting ∼3.36 eV) with 4f 7/2 binding energies (BEs) of 72 eV (curve 1 in Figure A) and 75.3 eV (curve 2 in Figure A), respectively . The low BE component at 72 eV (curve 1) corresponds to metallic Pt, while the high BE component at 75.3 eV (curve 2) is assigned to unreduced PtCl 6 2- ions, possibly bound to the surface of the Pt metal core.…”

Surface Modified Ruthenium Nanoparticles: Structural Investigation and Surface Analysis of a Novel Catalyst for Oxygen Reduction

“…On the basis of electrochemical work done by Lewerenz et al., the binding energies of ruthenium found at E B = 281.1 eV and E B = 282.7 eV can be assigned as Ru−O bonds as known from RuO 2 and RuO 3 (Figure B). The binding energy at E B = 281.7 eV can be interpreted as a metal organic phase according to a work published by Fachini and Cabrera studying ruthenium complexes such as Ru 3 (CO) 9 (CH 3 CN 3 ) 3 . Smaller peaks at binding energies higher than 285 eV can be addressed as Ru3d 5/2 peaks and C−O surface groups on carbon.…”