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Nuclear quantum effects on adsorption of H2 and isotopologues on metal ions

Journal Article · · Chemical Physics Letters
 [1];  [2];  [3];  [4];  [5]
  1. Jacobs University, Bremen (Germany). School of Engineering and Science
  2. Univ. of Rochester, NY (United States). Department of Chemistry
  3. Leipzig University (Germany). Wilhelm-Ostwald-Institute of Physical and Theoretical Chemistry
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science, and Computer Science and Mathematics Division
  5. 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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Cited By (5)

Theoretical assessment of the nuclear quantum effects on polymer crystallinity via perturbation theory and dynamics journal September 2018
An assessment of strategies for the development of solid-state adsorbents for vehicular hydrogen storage journal January 2018
Snowball formation for Cs + solvation in molecular hydrogen and deuterium journal January 2019
Entangled trajectories Hamiltonian dynamics for treating quantum nuclear effects journal April 2018
Accurate global adiabatic potential energy surface for the ground state of AlH 2 + by extrapolation to the complete basis set limit journal August 2019

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