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2. Although there is no evidence for a molecular chemisorbed state of hydrogen on a copper surface, H2 has been found to physisorb to Cu(100), with a binding energy of ~ 20 meV
3. J.B.A. Dumas: Ann. de Chim. et de Phys. III 8, 189 (1843)
4. H.S. Taylor: J. Am. Chem. Soc. 53, 578 (1931)
5. J.E. Lennard-Jones: Trans. Faraday Soc. 28, 333 (1932)