DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Similarities and differences between potassium and ammonium ions in liquid water: a first-principles study

Journal Article · · Physical Chemistry Chemical Physics. PCCP
DOI: https://doi.org/10.1039/c9cp06163k · OSTI ID:1767695
 [1];  [2]; ORCiD logo [3];  [4]; ORCiD logo [3];  [2]; ORCiD logo [2]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); OSTI
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. Yale Univ., New Haven, CT (United States)
  4. Yale Univ., New Haven, CT (United States); Technion-Israel Institute of Technology, Haifa (Israel)

Understanding ion solvation in liquid water is critical in optimizing materials for a wide variety of emerging technologies, including water desalination and purification. Here, we report a systematic investigation and comparison of solvated K+ and NH4+ using first-principles molecular dynamics simulations. Our simulations reveal a strong analogy in the solvation properties of the two ions, including the size of the solvation shell as well as the solvation strength. On the other hand, we find that the local water structure in the ion solvation is significantly different; specifically, NH4+ yields a smaller number of water molecules and a more ordered water structure in the first solvation shell due to the formation of hydrogen bonds between the ion and water molecules. Finally, our simulations indicate that a comparable solvation strength of the two ions is a result of an interplay between the nature of ion–water interaction and number of water molecules that can be accommodated in the ion solvation shell.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). The Center for Enhanced Nanofluidic Transport (CENT); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC52-07NA27344; SC0019112
OSTI ID:
1767695
Report Number(s):
LLNL-JRNL-798202
Journal Information:
Physical Chemistry Chemical Physics. PCCP, Journal Name: Physical Chemistry Chemical Physics. PCCP Journal Issue: 4 Vol. 22; ISSN 1463-9076
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

References (69)

Hindered transport of large molecules in liquid-filled pores journal September 1987
The Importance of Dehydration in Determining Ion Transport in Narrow Pores journal March 2012
Influence of ion size and charge in nanofiltration journal August 1998
Optimization algorithm for the generation of ONCV pseudopotentials journal November 2015
Structural and electronic properties of aqueous NaCl solutions from ab initio molecular dynamics simulations with hybrid density functionals journal June 2014
Removal of ammonium from greywater using natural zeolite journal August 2011
Activation behavior for ion permeation in ion-exchange membranes: Role of ion dehydration in selective transport journal June 2019
Simultaneous and Mn2+ removal from drinking water using a biological aerated filter system: Effects of different aeration rates journal October 2013
Separation of monovalent and divalent ions from aqueous solution by electrodialysis and nanofiltration journal March 2004
Investigating Protein Folding and Unfolding in Electrospray Nanodrops Upon Rapid Mixing Using Theta-Glass Emitters journal December 2014
Role of Ionic Charge Density in Donnan Exclusion of Monovalent Anions by Nanofiltration journal February 2018
Using Ultramicroporous Carbon for the Selective Removal of Nitrate with Capacitive Deionization journal June 2019
Solvation Energy of Ions in Polymers: Effects of Chain Length and Connectivity on Saturated Dipoles near Ions journal March 2017
Effects of Dielectric Inhomogeneity and Electrostatic Correlation on the Solvation Energy of Ions in Liquids journal May 2018
Water Film Adsorbed on the α-Al 2 O 3 (0001) Surface: Structural Properties and Dynamical Behaviors from First-Principles Molecular Dynamics Simulations journal January 2016
Salt Solutions in Carbon Nanotubes: The Role of Cation−π Interactions journal March 2016
Insights on the Alumina–Water Interface Structure by Direct Comparison of Density Functional Simulations with X-ray Reflectivity journal October 2018
Critical Knowledge Gaps in Mass Transport through Single-Digit Nanopores: A Review and Perspective journal May 2019
Local and Global Effects of Dissolved Sodium Chloride on the Structure of Water journal March 2017
Quantum Dynamics and Spectroscopy of Ab Initio Liquid Water: The Interplay of Nuclear and Electronic Quantum Effects journal March 2017
Integrating Ab Initio Simulations and X-ray Photoelectron Spectroscopy: Toward A Realistic Description of Oxidized Solid/Liquid Interfaces journal December 2017
First-Principles Simulations of Liquid Water Using a Dielectric-Dependent Hybrid Functional journal May 2018
Effect of Ions on the Structure of Water: Structure Making and Breaking journal March 2009
First Principles Simulations of the Infrared Spectrum of Liquid Water Using Hybrid Density Functionals journal March 2011
Structural and Vibrational Properties of Liquid Water from van der Waals Density Functionals journal August 2011
Halide, Ammonium, and Alkali Metal Ion Parameters for Modeling Aqueous Solutions journal August 2006
Experimental Energy Barriers to Anions Transporting through Nanofiltration Membranes journal February 2013
Not Ions Alone:  Barriers to Ion Permeation in Nanopores and Channels journal November 2004
A Controllable Molecular Sieve for Na + and K + Ions journal February 2010
Ab Initio Simulation of Rotational Dynamics of Solvated Ammonium Ion in Water journal December 1999
Aqueous Solvation of Ammonia and Ammonium: Probing Hydrogen Bond Motifs with FT-IR and Soft X-ray Spectroscopy journal August 2017
Absolute Hydration Free Energy Scale for Alkali and Halide Ions Established from Simulations with a Polarizable Force Field journal February 2006
Molecular Simulation Analysis and X-ray Absorption Measurement of Ca 2+ , K + and Cl - Ions in Solution journal November 2006
Hydration of Sodium, Potassium, and Chloride Ions in Solution and the Concept of Structure Maker/Breaker journal December 2007
Designing Carbon Nanotube Membranes for Efficient Water Desalination journal February 2008
Intrinsic Ion Selectivity of Narrow Hydrophobic Pores journal May 2009
Absolute Hydration Entropies of Alkali Metal Ions from Molecular Dynamics Simulations journal July 2009
Accurate first-principles structures and energies of diversely bonded systems from an efficient density functional journal June 2016
Modelling heterogeneous interfaces for solar water splitting journal January 2017
A new lattice Monte Carlo simulation for dielectric saturation in ion-containing liquids journal January 2015
Ab initio molecular dynamics study of an aqueous NaCl solution under an electric field journal January 2016
Ionic diffusion and proton transfer in aqueous solutions of alkali metal salts journal January 2017
Stability of hydrolytic arsenic species in aqueous solutions: As 3+ vs. As 5+ journal January 2018
Quantifying the hydration structure of sodium and potassium ions: taking additional steps on Jacob's Ladder journal January 2020
Thermodynamics of solvation of ions. Part 5.—Gibbs free energy of hydration at 298.15 K journal January 1991
Water and ion transport through functionalised carbon nanotubes: implications for desalination technology journal January 2011
On rotational dynamics of an NH4+ ion in water journal May 2003
Towards an assessment of the accuracy of density functional theory for first principles simulations of water journal January 2004
Towards an assessment of the accuracy of density functional theory for first principles simulations of water. II journal September 2004
Canonical sampling through velocity rescaling journal January 2007
The individual and collective effects of exact exchange and dispersion interactions on the ab initio structure of liquid water journal August 2014
Structure and dynamics of aqueous solutions from PBE-based first-principles molecular dynamics simulations journal October 2016
Equilibration and analysis of first-principles molecular dynamics simulations of water journal March 2018
Structural, electronic, and dynamical properties of liquid water by ab initio molecular dynamics based on SCAN functional within the canonical ensemble journal April 2018
Ensemble first-principles molecular dynamics simulations of water using the SCAN meta-GGA density functional journal October 2019
Ion exclusion by sub-2-nm carbon nanotube pores journal June 2008
The influence of geometry, surface character, and flexibility on the permeation of ions and water through biological pores journal March 2004
Ion Solvation in Liquid Mixtures: Effects of Solvent Reorganization journal December 2012
Strongly Constrained and Appropriately Normed Semilocal Density Functional journal July 2015
Generalized Gradient Approximation Made Simple journal October 1996
Electronic structure of aqueous solutions: Bridging the gap between theory and experiments journal June 2017
Fast Mass Transport Through Sub-2-Nanometer Carbon Nanotubes journal May 2006
The Future of Seawater Desalination: Energy, Technology, and the Environment journal August 2011
Enhanced water permeability and tunable ion selectivity in subnanometer carbon nanotube porins journal August 2017
Molecular recognition of organic ammonium ions in solution using synthetic receptors journal January 2010
The Individual and Collective Effects of Exact Exchange and Dispersion Interactions on the Ab Initio Structure of Liquid Water text January 2014
Strongly Constrained and Appropriately Normed Semilocal Density Functional preprint January 2015
Molecular recognition of organic ammonium ions in solution using synthetic receptors. text January 2010
Quantifying the hydration structure of sodium and potassium ions: taking additional steps on Jacob's Ladder text January 2020