Work

Sum Frequency Generation Vibrational Spectroscopy of Pyridine Hydrogenation on Platinum Nanoparticles

Year: 2008

Type: article

Abstract: Pyridine hydrogenation in the presence of a surface monolayer consisting of cubic Pt nanoparticles stabilized by tetradecyltrimethylammonium bromide (TTAB) was investigated by sum frequency generation (SFG) vibrational spectroscopy using total internal reflection (TIR) geometry. TIR-SFG spectra analysis revealed that a pyridinium cation (C 5 H 5 NH + ) forms during pyridine hydrogenation on the Pt nanoparticle surface, and the NH group in the C 5 H 5 NH + cation becomes more hydrogen bound with the increase of the temperature. In addition, the surface coverage of the cation decreases with the increase of the temperature. An important contribution of this study is the in situ identification of reaction intermediates adsorbed on the Pt nanoparticle monolayer during pyridine hydrogenation.

Source: The Journal of Physical Chemistry C

DOI: 10.1021/jp801583q

Authors: Kaitlin M. Bratlie, Kyriakos Komvopoulos, Gabor A. Somorjai

Institutions: Lawrence Berkeley National Laboratory, University of California, Berkeley

Language: English

Topic: Spectroscopy and Quantum Chemical Studies

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: U.S. Department of Energy, Industrial Technology Research Institute, Basic Energy Sciences, Brain Injury Research Center