Published 2011 | Version v1
Journal article Metadata-only

Coadsorption of CO and hydrogen on submonolayer Pt/Ru(0001) films

Creators

  • 1. Institute of Surface Chemistry and Catalysis, Ulm University, D-89069 Ulm (Germany)

Description

Due to their high CO tolerance, bimetallic Pt-Ru catalysts are an attractive electrode material for the oxidation of H2-rich fuel gases prepared by reforming of fossil fuels in low-temperature polymer electrolyte fuel cells. This makes the adsorption properties of PtRu systems an interesting topic for fundamental studies on model systems. We have investigated the coadsorption of CO and hydrogen on submonolayer Pt films deposited on the Ru(0001) surface with TPD and IRAS under UHV conditions. Adsorption of either of the two molecules on the Pt covered parts of the bimetallic surface is weaker compared to adsorption on the remaining uncovered Ru parts. Coadsorption of hydrogen and CO leads to a displacement of hydrogen from the Ru areas to the energetically less favourable Pt islands. At the same time a further weakening of the hydrogen-Pt bond is observed, which is attributed to repulsive interactions between adsorbed hydrogen and CO molecules.

Additional details

Identifiers

URL
http://www.dpg-verhandlungen.de;

Publishing Information

Journal Title
Verhandlungen der Deutschen Physikalischen Gesellschaft
Journal Issue
Dresden 2011 issue
Series
Also available as printed version: Verhandlungen der Deutschen Physikalischen Gesellschaft v. 46(1)
Journal Page Range
[1 p.]
ISSN
0420-0195
CODEN
VDPEAZ

Conference

Title
75. Annual meeting of the DPG and combined DPG Spring meeting of the condensed matter section and the section AMOP with further DPG divisions environmental physics, history of physics, microprobes, radiation and medical physics, as well as the working groups energy, equal opportunities, industry and business, information, philosophy of physics, physics and disarmament, young DPG
Dates
13-18 Mar 2011
Place
Dresden (Germany)

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
43003241
Subject category
S36: MATERIALS SCIENCE;
Resource subtype / Literary indicator
Conference
Descriptors DEI
ABSORPTION SPECTRA; ADSORPTION; BIMETALS; CARBON MONOXIDE; CHEMICAL BONDS; DESORPTION; HYDROGEN; INFRARED SPECTRA; MOLECULES; PLATINUM; PRESSURE RANGE MICRO PA; RUTHENIUM; SURFACES; THIN FILMS
Descriptors DEC
CARBON COMPOUNDS; CARBON OXIDES; CHALCOGENIDES; ELEMENTS; FILMS; METALS; NONMETALS; OXIDES; OXYGEN COMPOUNDS; PLATINUM METALS; PRESSURE RANGE; REFRACTORY METALS; SORPTION; SPECTRA; TRANSITION ELEMENTS

Optional Information

Notes
Session: O 12.3 Mo 15:30; No further information available