Nuclear quantum effects on adsorption of H2 and isotopologues on metal ions
- Jacobs University, Bremen (Germany). School of Engineering and Science
- Univ. of Rochester, NY (United States). Department of Chemistry
- Leipzig University (Germany). Wilhelm-Ostwald-Institute of Physical and Theoretical Chemistry
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science, and Computer Science and Mathematics Division
- University of South Carolina, Columbia, SC (United States). Department of Chemistry and Biochemistry
The nuclear quantum effects on the zero-point energy (ZPE), influencing adsorption of H$$_2$$ and isotopologues on metal ions, are examined in this study using normal mode analysis of ab initio electronic structure results for complexes with 17 metal cations. To estimate for the anharmonicity, a nuclear wavepacket dynamics on the ground state electronic potential energy surfaces (PES) have been employed for complexes of Li$^+$ and Cu$$^{+2}$$ with H$$_2$$, D$$_2$$, HD. The dynamics analysis shows that incorporation of the PES anharmonicity changes the ZPE by up to 9%. Finally, the lightest metallic nuclei, Li and Be, are found to be the most 'quantum'. The largest selectivity in adsorption is predicted for Cu, Ni and Co ions.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1338543
- Journal Information:
- Chemical Physics Letters, Journal Name: Chemical Physics Letters Journal Issue: C Vol. 670; ISSN 0009-2614
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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