Chemistry of bimetallic and alloys surfaces [electronic resource].
- Published
- Washington, D.C. : United States. Dept. of Energy, 1991.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy. - Physical Description
- Pages: (6 pages) : digital, PDF file
- Additional Creators
- University of Southern California, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
Access Online
- Restrictions on Access
- Free-to-read Unrestricted online access
- Summary
- We have continued our work on elucidating the underlying principles that govern chemical reactions occurring on bimetallic and alloy surfaces. Our goal is to aid in the atomic level explanation of the reactivity and selectivity of alloy and bimetallic cluster catalysts and to provide a fundamental basis for the design of new catalysts with improved performance. Our approach is to use a battery of surface science methods to obtain fundamental data on the thermochemistry and kinetics of the adsorption and reaction of molecules on extensively characterized, single-crystal bimetallic surfaces. We measure changes in chemisorption bond strength, adsorption site distributions, and hydrocarbon fragment stability and reactivity and correlate these results with the geometric and electronic structure of the metal atoms on the surface. Often, our aim is to carefully design experiments that isolate the several factors (e.g., ensemble and ligand effects) that control surface chemistry and catalysis on bimetallic and alloy surfaces in order to better understand the importance of each contribution. In the past 18 months, we have continued to study how alkali promoters strongly affect the reactions of hydrocarbons on Pt and Ni surfaces by altering the electronic structure and inducing significant site-blocking effects. We have shown that bismuth coadsorption provides benchmark data on ensemble sizes required for chemical reactions on Pt and Ni surfaces. Surface alloys of Sn/Pt are being used for detailed probing of ensemble sizes and also reactive site requirements. 22 refs.
- Report Numbers
- E 1.99:doe/er/14117-t2
doe/er/14117-t2 - Subject(s)
- Other Subject(s)
- Carbon
- Adsorption
- Ethylene
- Dehydrogenation
- Hydrogen
- Nickel
- Sorptive Properties
- Platinum
- Bismuth Additions
- Electron Diffraction
- Potassium Additions
- Progress Report
- Tin Additions
- Alkenes
- Alloys
- Bismuth Alloys
- Chemical Reactions
- Coherent Scattering
- Diffraction
- Document Types
- Elements
- Hydrocarbons
- Metals
- Nonmetals
- Organic Compounds
- Platinum Metals
- Potassium Alloys
- Scattering
- Sorption
- Surface Properties
- Tin Alloys
- Transition Elements
- Note
- Published through SciTech Connect.
10/18/1991.
"doe/er/14117-t2"
"DE92004337"
Koel, B.E. - Funding Information
- FG03-90ER14117
View MARC record | catkey: 14396690