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

Title: Proton diffusion and hydrogen/deuterium exchange in amorphous solid water at temperatures from 114 to 134 K

Journal Article · · Journal of Chemical Physics
DOI: https://doi.org/10.1063/5.0233755 · OSTI ID:2483841

The reaction coefficient for hydrogen/deuterium (H/D) exchange and the diffusion of hydrated excess protons within amorphous solid water (ASW) are characterized as a function of temperature. For these experiments, water films are deposited on a Pt(111) substrate at 108 K, and reactions with pre-adsorbed hydrogen atoms produce hydrated protons. Upon heating, protons diffuse within the water, and H/D exchange occurs when they encounter D2O probe molecules deposited in the films. The time-dependent concentration of D2O is monitored with infrared spectroscopy, and it indicates the protons diffusion from the substrate and establish an equilibrium distribution prior to significant H/D exchange for temperatures 114 K ≤T≤ 134 K. By controlling the distance between the D2O molecules and the substrate, we probe the distribution of protons within the film. It decays as x−2 for the examined range of x (12–52 nm) due to the electric field that develops between the diffusing protons and their image charges in the metal substrate. This agrees with the theoretical distance scaling for the equilibrated proton concentration in a dielectric near a metal boundary. From the proton concentration and the measured D2O decay rate, a lower bound for the proton diffusion coefficient ranging from 10−20 m2/s at 114 K to 10−18 m2/s at 134 K is estimated. The diffusion coefficient has an activation energy of 0.40 eV, which is comparable to energies reported for molecular translations and rotations of H2O, suggesting they may play a critical role in the proton diffusion mechanism within ASW.

Sponsoring Organization:
USDOE
OSTI ID:
2483841
Journal Information:
Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 24 Vol. 161; ISSN 0021-9606
Publisher:
American Institute of PhysicsCopyright Statement
Country of Publication:
United States
Language:
English

References (73)

Protons at Ice Surfaces journal August 2006
The Nature of Hydrated Protons on Platinum Surfaces journal November 2017
Proton Transfer 200 Years after von Grotthuss: Insights from Ab Initio Simulations journal September 2006
The Grotthuss mechanism journal October 1995
The structural characteristics of amorphous D2O ice by neutron diffraction journal December 1982
Coadsorption of water and hydrogen on Pt(100): formation of adsorbed hydronium ions journal September 1992
Diffusion-controlled reaction rates journal August 1949
Proton Transport and Related Chemical Processes of Ice journal July 2021
Role of Presolvation and Anharmonicity in Aqueous Phase Hydrated Proton Solvation and Transport journal November 2015
Picosecond Proton Transfer Kinetics in Water Revealed with Ultrafast IR Spectroscopy journal February 2018
Coupling Surface Coverage and Electrostatic Effects on the Interfacial Adlayer–Water Structure of Hydrogenated Single-Crystal Platinum Electrodes journal May 2020
Surface Charge Layer of Amorphous Solid Water with Adsorbed Acid or Base: Asymmetric Depth Distributions of H+ and OH Ions journal May 2016
Dissociation of Trifluoroacetic Acid in Amorphous Solid Water: Charge-Delocalized Hydroniums and Zundel Continuum Absorption journal June 2017
Tunneling Diffusion of Excess Protons in Amorphous Solid Water at 10 and 80 K journal January 2019
Decomposition of the Experimental Raman and Infrared Spectra of Acidic Water into Proton, Special Pair, and Counterion Contributions journal October 2017
Hydrated Excess Protons in Acetonitrile/Water Mixtures: Solvation Species and Ultrafast Proton Motions journal April 2019
Tracking Aqueous Proton Transfer by Two-Dimensional Infrared Spectroscopy and ab Initio Molecular Dynamics Simulations journal May 2019
A Streamlined Approach to Solving Simple and Complex Kinetic Systems Analytically journal November 1999
Ab Initio Molecular Dynamics Simulation of the Solvation and Transport of H3O+ and OH- Ions in Water journal April 1995
Defect Activity in Amorphous Ice From Isotopic Exchange Data: Insight into the Glass Transition journal July 1995
Proton conductivity in supercooled aqueous hydrochloric acid solutions journal April 1984
The Mechanism of Hydrated Proton Transport in Water journal December 2000
The Activation Energies of Proton Transfer Reactions in Water journal November 1964
The role of Hydrogen Bonds in Conduction by Hydrogen and Hydroxyl ions journal August 1931
The Change of the Equivalent Conductance of ions with the Temperature. journal September 1909
Resolving the Structural Debate for the Hydrated Excess Proton in Water journal November 2021
The Mechanism of the Hydrogen Ion Conduction in Liquid Light and Heavy Water Derived from the Temperature Dependence of Their Limiting Conductivities journal December 2010
Fast Proton Hopping Detection in Ice Ih by Quasi-Elastic Neutron Scattering journal May 2011
Fast and Slow Proton Transfer in Ice: The Role of the Quasi-Liquid Layer and Hydrogen-Bond Network journal April 2014
Special Pair Dance and Partner Selection: Elementary Steps in Proton Transport in Liquid Water journal August 2008
Structural Relaxation of Low-Density Amorphous Ice upon Thermal Annealing journal October 2013
The nature of the hydrated excess proton in water journal February 1999
Immobility of protons in ice from 30 to 190 K journal April 1999
Supercooled liquids and the glass transition journal March 2001
Direct visualization of concerted proton tunnelling in a water nanocluster journal February 2015
Search for a Grotthuss mechanism through the observation of proton transfer journal April 2023
Diffusion of molecules in the bulk of a low density amorphous ice from molecular dynamics simulations journal January 2015
Interconversion of hydrated protons at the interface between liquid water and platinum journal January 2019
Isotope effects on the dynamics of amorphous ices and aqueous phosphoric acid solutions journal January 2022
Proton and deuteron mobility in normal and heavy water solutions of electrolytes
  • Roberts, Noel K.; Northey, Helen L.
  • Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases, Vol. 70, Issue 0 https://doi.org/10.1039/f19747000253
journal January 1974
Diaphragm cell for high-temperature diffusion measurements. Tracer Diffusion coefficients for water to 363 K
  • Easteal, Allan J.; Price, William E.; Woolf, Lawrence A.
  • Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases, Vol. 85, Issue 5 https://doi.org/10.1039/f19898501091
journal January 1989
Prototropic charge migration in water. Part 2.—Interpretation of nuclear magnetic resonance and conductivity data in terms of model mechanisms journal January 1983
Amorphous solid water’s isotopic exchange kinetics journal August 2002
Nuclear Magnetic Resonance Study of the Proton Transfer in Water journal February 1961
Random Walks on Lattices. II journal February 1965
Self‐Diffusion of Tritium in Natural and Synthetic Ice Monocrystals journal May 1967
Proton Conductance and the Existence of the H3O· Ion journal April 1956
A Theory of Water and Ionic Solution, with Particular Reference to Hydrogen and Hydroxyl Ions journal August 1933
H/D isotopic exchange between water molecules at ice surfaces journal January 2004
Electron-stimulated production of molecular hydrogen at the interfaces of amorphous solid water films on Pt(111) journal August 2004
Dielectric relaxation time of bulk water at 136–140K, background loss and crystallization effects journal April 2005
Dissociative adsorption of hydrogen fluoride onto amorphous solid water journal September 2009
Energy barrier of proton transfer at ice surfaces journal July 2010
Diffraction pattern and structure of amorphous solid water at 10 and 77 °K journal February 1976
Communication: Proton exchange in low temperature co-mixed amorphous H 2 O and D 2 O films: The effect of the underlying Pt(111) and graphene substrates journal August 2018
Perspective: Crossing the Widom line in no man’s land: Experiments, simulations, and the location of the liquid-liquid critical point in supercooled water journal October 2018
Entropic barriers in the kinetics of aqueous proton transfer journal July 2019
The anomalous behavior of the density of water in the range 30 K < T < 373 K journal November 2007
Water's second glass transition journal October 2013
Growth rate of crystalline ice and the diffusivity of supercooled water from 126 to 262 K journal December 2016
Diffusive dynamics during the high-to-low density transition in amorphous ice journal June 2017
Nonlinear electrostatics: the Poisson–Boltzmann equation journal July 2018
Number of distinct sites visited by a resetting random walker journal May 2022
Ionicity and hydrogen affinity of water layers on metals journal October 2022
Self-dissociation and protonic charge transport in water and
  • Eigen, Manfred; De Maeyer, L.
  • Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, Vol. 247, Issue 1251, p. 505-533 https://doi.org/10.1098/rspa.1958.0208
journal October 1958
Anomalous Proton Dynamics in Ice at Low Temperatures journal October 2009
Pentagons and Heptagons in the First Water Layer on Pt(111) journal July 2010
Asymmetric Transport Efficiencies of Positive and Negative Ion Defects in Amorphous Ice journal May 2012
Amorphous Water-Ice Relaxations Measured with Soft-Landed Ions journal June 1998
Ultrafast Vibrational and Structural Dynamics of the Proton in Liquid Water journal April 2006
Dielectric properties of normal supercooled water obtained in alcohol/water mixtures journal January 1992
Formation of Glasses from Liquids and Biopolymers journal March 1995
Energiebänder der tunnelnden Überschuß-Protonen in flüssigen Säuren. Eine IR-spektroskopische Untersuchung der Natur der Gruppierungen H 5 O 2 + journal April 1968