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

Title: Mechanism of Fe(II) Chemisorption on Hematite(001) Revealed by Reactive Neural Network Potential Molecular Dynamics

Journal Article · · Journal of Physical Chemistry Letters

Atomic-scale understanding of important geochemical processes including sorption, dissolution, nucleation, and crystal growth is difficult to obtain from experimental measurements alone and would benefit from strong continuous progress in molecular simulation. To this end, we present a reactive neural network potential-based molecular dynamics approach to simulate the interaction of aqueous ions on mineral surfaces in contact with liquid water, taking Fe(II) on hematite(001) as a model system. We show that a single neural network potential predicts rate constants for water exchange for aqueous Fe(II) and for the exergonic chemisorption of aqueous Fe(II) on hematite(001) in good agreement with experimental observations. The neural network potential developed herein allows one to converge free energy profiles and transmission coefficients at density functional theory-level accuracy outperforming state-of-the-art classical force field potentials. This suggests that machine learning potential molecular dynamics should become the method of choice for atomistic studies of geochemical processes.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division (CSGB)
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
2500913
Report Number(s):
PNNL-SA--207725
Journal Information:
Journal of Physical Chemistry Letters, Journal Name: Journal of Physical Chemistry Letters Journal Issue: 4 Vol. 16; ISSN 1948-7185
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

References (51)

Hematite Photoanodes for Water Oxidation: Electronic Transitions, Carrier Dynamics, and Surface Energetics journal April 2021
Solar Water Splitting: Progress Using Hematite (α-Fe2O3) Photoelectrodes journal March 2011
MDAnalysis: A toolkit for the analysis of molecular dynamics simulations journal April 2011
Adsorption of Mg2+ and K+ on the kaolinite (0 0 1) surface in aqueous system: A combined DFT and AIMD study with an experimental verification journal February 2021
Inner-Helmholtz potential development at the hematite (α-Fe2O3) (001) surface journal August 2011
Four Generations of High-Dimensional Neural Network Potentials journal March 2021
Oxide– and Silicate–Water Interfaces and Their Roles in Technology and the Environment journal May 2023
Iron Atom Exchange between Hematite and Aqueous Fe(II) journal June 2015
Systematic Parametrization of Divalent Metal Ions for the OPC3, OPC, TIP3P-FB, and TIP4P-FB Water Models journal June 2020
Electric Field Effects on Water and Ion Structure and Diffusion at the Orthoclase (001)–Water Interface journal April 2023
Structure and Dynamics of Aqueous Electrolytes at Quartz (001) and (101) Surfaces journal April 2024
SBH10: A Benchmark Database of Barrier Heights on Transition Metal Surfaces journal September 2017
Resolving Iron(II) Sorption and Oxidative Growth on Hematite (001) Using Atom Probe Tomography journal February 2018
Structure and Dynamics of the Liquid–Water/Zinc-Oxide Interface from Machine Learning Potential Simulations journal December 2018
Water Breakup at Fe2O3–Hematite/Water Interfaces: Influence of External Electric Fields from Nonequilibrium Ab Initio Molecular Dynamics journal July 2021
Unraveling the Surface Reactivity of Pristine and Ti-Doped Hematite with Water journal November 2021
Fast Interconversion of Hydrogen Bonding at the Hematite (001)–Liquid Water Interface journal March 2016
Proton-Transfer Mechanisms at the Water–ZnO Interface: The Role of Presolvation journal March 2017
Structure and dynamics of hydrated ions journal May 1993
Inorganic and Bioinorganic Solvent Exchange Mechanisms journal June 2005
Constrained Density Functional Theory and Its Application in Long-Range Electron Transfer journal May 2006
Spectroscopic Evidence for Fe(II)−Fe(III) Electron Transfer at the Iron Oxide−Water Interface journal September 2004
Fe(II) Sorption on Hematite:  New Insights Based on Spectroscopic Measurements journal January 2007
Electron and Hole Mobilities in Bulk Hematite from Spin-Constrained Density Functional Theory journal March 2022
Interplay between Facets and Defects during the Dissociative and Molecular Adsorption of Water on Metal Oxide Surfaces journal January 2023
Insights into the Mechanism of Fe(II) Adsorption and Oxidation at Fe–Clay Mineral Surfaces from First-Principles Calculations journal October 2013
Computational Molecular Simulation of the Oxidative Adsorption of Ferrous Iron at the Hematite (001)–Water Interface journal April 2015
Electron Transport in Pure and Doped Hematite journal April 2011
Microbiological evidence for Fe(III) reduction on early Earth journal September 1998
Universal machine learning for the response of atomistic systems to external fields journal October 2023
Machine learning the electric field response of condensed phase systems using perturbed neural network potentials journal September 2024
Solar hydrogen production with semiconductor metal oxides: new directions in experiment and theory journal January 2012
Neural network molecular dynamics simulations of solid–liquid interfaces: water at low-index copper surfaces journal January 2016
Facet-selective adsorption of Fe( ii ) on hematite visualized by nanoscale secondary ion mass spectrometry journal January 2019
Free energy of proton transfer at the water–TiO 2 interface from ab initio deep potential molecular dynamics journal January 2020
Nanosecond solvation dynamics of the hematite/liquid water interface at hybrid DFT accuracy using committee neural network potentials journal January 2022
Long-range proton and hydroxide ion transfer dynamics at the water/CeO2 interface in the nanosecond regime: reactive molecular dynamics simulations and kinetic analysis journal January 2024
Transition path sampling of water exchange rates and mechanisms around aqueous ions journal September 2009
Atom-centered symmetry functions for constructing high-dimensional neural network potentials journal February 2011
Statistical mechanics of isomerization dynamics in liquids and the transition state approximation journal January 1978
Maximally resolved anharmonic OH vibrational spectrum of the water/ZnO(101¯0) interface from a high-dimensional neural network potential journal June 2018
SchNet – A deep learning architecture for molecules and materials journal June 2018
Committee neural network potentials control generalization errors and enable active learning journal September 2020
Insights into lithium manganese oxide–water interfaces using machine learning potentials journal December 2021
Transition rate theory, spectral analysis, and reactive paths journal April 2022
Machine learning potentials for complex aqueous systems made simple journal September 2021
Water dissociation at the water–rutile TiO 2 (110) interface from ab initio-based deep neural network simulations journal January 2023
Ferrous Fe(II) hydration in a 1 molal heavy water solution of iron chloride journal January 1992
Linked Reactivity at Mineral-Water Interfaces Through Bulk Crystal Conduction journal March 2008
Toward New Uses for Hematite journal April 2008
MDAnalysis: A Python Package for the Rapid Analysis of Molecular Dynamics Simulations conference January 2016