A tilted precursor for CO dissociation on the Fe(100) surface |
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| Affiliation: | 1. Chemistry Department, Princeton University, NJ 08544, USA;2. Exxon Research and Engineering Company, Annandale, NJ 08801, USA;3. Brookhaven National Laboratory, NSLS Department, 510E Upton, NY 11973, USA;4. Stanford Synchrotron Radiation Laboratory, Menlo Park, CA 94304, USA;1. Japan Atomic Energy Agency, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan;2. Department of Nuclear, Plasma and Radiological Engineering, University of Illinois at Urbana, Champaign, IL 61801, USA;1. SynCat@DIFFER, Syngaschem BV, P.O. Box 6336, 5600 HH Eindhoven, The Netherlands;2. SynCat@Beijing, Synfuels China Technology Co., Ltd., Huairou, Beijing 101407, PR China;3. Sasol, Group Technology, 1 Klasie Havenga street, Sasolburg 1947, South Africa;1. Science Division, Yale-NUS College, Singapore 138527, Singapore;2. Department of Chemical Engineering, KTH Royal Institute of Technology, Stockholm 10044, Sweden;3. Competence Centre for Catalysis, Chalmers University of Technology, Gothenburg 41296, Sweden;4. ICES, A*STAR, Singapore Synchrotron Light Source, Singapore 117603, Singapore;5. Materials Science and Engineering, National University of Singapore, Singapore 117575, Singapore |
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| Abstract: | Near edge X-ray absorption fine structure (NEXAFS) has been used to study the molecular orientation of the α3 state of CO on the Fe(100) surface. It is found that the molecule is tilted by 45° ± 10° with respect to the surface normal, allowing direct interaction of the oxygen end of the molecule with the iron surface. The C-O bond is found to be elongated by 0.07 ± 0.02 Å in the α3 state, relative to the other molecularly adsorbed CO states on this surface. |
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