Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Hierarchical Ion Interactions in the Direct Air Capture of CO2 at Air/Aqueous Interfaces

Journal Article · · Journal of Chemical Physics
DOI:https://doi.org/10.1063/5.0231272· OSTI ID:2478339
 [1];  [1];  [1];  [1];  [1];  [2];  [1];  [1];  [1];  [1]
  1. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
  2. Univ. of Tennessee, Knoxville, TN (United States)

The direct air capture (DAC) of CO2 using aqueous solvents is plagued by slow kinetics and interfacial barriers that limit effectiveness in combating climate change. Functionalizing air/aqueous surfaces with charged amphiphiles shows promise in accelerating DAC; however, insight into these interfaces and how they evolve in time remains poorly understood. Specifically, competitive ion interactions between DAC reagents and reaction products feedback onto the interfacial structure, thereby modulating interfacial chemical composition and overall function. In this work, we probe the role of glycine amino acid anions (Gly-), an effective CO2 capture reagent, that promotes the organization of cationic oligomers at air/aqueous interfaces. These surfaces are probed with vibrational sum frequency generation spectroscopy and molecular dynamics simulations. Our findings demonstrate that the competition for surface sites between Gly- and captured carbonaceous anions (HCO3-, CO32-, carbamates) drives changes in surface hydration, which in turn tunes oligomer ordering. This phenomenon is related to a hierarchical ordering of anions at the surface that are electrostatically attracted to the surface and their ability to compete for interfacial water. These results point to new ways to tune interfaces for DAC via stratification of ions based on relative surface propensities and specific ion effects.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division (CSGB)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
2478339
Journal Information:
Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 16 Vol. 161; ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

References (60)

LINCS: A linear constraint solver for molecular simulations journal September 1997
Photochemically‐Driven CO2 Release Using a Metastable‐State Photoacid for Energy Efficient Direct Air Capture journal June 2023
GROMACS: Fast, flexible, and free journal January 2005
PACKMOL: A package for building initial configurations for molecular dynamics simulations journal October 2009
Effect of surfactant lengths on gas-liquid oxygen mass transfer from a single rising bubble journal January 2022
Investigations of the Hofmeister series and other specific ion effects using lipid model systems journal May 2017
Physicochemical control of solvation and molecular assembly of charged amphiphilic oligomers at air-aqueous interfaces journal September 2024
Techno-economic assessment of CO2 direct air capture plants journal July 2019
Polymers of intrinsic microporosity for energy-intensive membrane-based gas separations journal August 2018
An ab initio free energy study of the reaction mechanism and rate-limiting steps of CO2 capture by aqueous glycine journal November 2023
The Hofmeister series: salt and solvent effects on interfacial phenomena journal August 1997
Direct Capture of CO2 from Ambient Air journal August 2016
Enhanced Carbon Capture through Incorporation of Surfactant Additives journal June 2016
Direct Air Capture of CO 2 with Aqueous Amino Acids and Solid Bis-iminoguanidines (BIGs) journal November 2019
Anion Specific Effects at Negatively Charged Interfaces: Influence of Cl, Br, I, and SCN on the Interactions of Na+ with the Carboxylic Acid Moiety journal October 2021
Tracking Molecular Transport Across Oil/Aqueous Interfaces: Insight into “Antagonistic” Binding in Solvent Extraction journal May 2023
Modifying Specific Ion Effects: Studies of Monovalent Ion Interactions with Amines journal July 2024
Temperature-Dependent Chemical Functional Group Reorientation at Silicone Surfaces journal October 2021
Intermolecular Interactions at the Interface Quantified by Surface-Sensitive Second-Order Fermi Resonant Signals journal July 2015
Molecular Insights into the Role of Electronic Substituents on the Chemical Environment of the −CH 3 and >C═O Groups of Neat Liquid Monomers Using Sum Frequency Generation Spectroscopy journal October 2019
Intermolecular Interactions at the Silica–Liquid Interface Modulate the Fermi Resonance Coupling in Surface Methanol journal June 2021
Characterizing Anion Adsorption to Aqueous Interfaces: Toluene–Water versus Air–Water journal December 2021
Squeezing Out Interfacial Solvation: The Role of Hydrogen-Bonding in the Structural and Orientational Freedom of Molecular Self-Assembly journal March 2022
The Unexpected Role of Cations in the Self-Assembly of Positively Charged Amphiphiles at Liquid/Liquid Interfaces journal November 2022
Anions and Cations Affect Amino Acid Dissociation Equilibria via Distinct Mechanisms journal October 2023
Adsorption, Orientation, and Speciation of Amino Acids at Air–Aqueous Interfaces for the Direct Air Capture of CO2 journal July 2024
Hydrogen-Bond-Driven Chemical Separations: Elucidating the Interfacial Steps of Self-Assembly in Solvent Extraction journal June 2020
Chemical Feedback in the Self-Assembly and Function of Air–Liquid Interfaces: Insight into the Bottlenecks of CO2 Direct Air Capture journal March 2023
Cations Control Lipid Bilayer Memcapacitance Associated with Long-Term Potentiation journal September 2023
Synergistic Assembly of Charged Oligomers and Amino Acids at the Air–Water Interface: An Avenue toward Surface-Directed CO2 Capture journal February 2024
Antagonistic Role of Aqueous Complexation in the Solvent Extraction and Separation of Rare Earth Ions journal October 2021
Specific Ion Effects at the Air/Water Interface journal April 2006
Sum-Frequency Vibrational Spectroscopy on Water Interfaces:  Polar Orientation of Water Molecules at Interfaces journal April 2006
Mass-Transfer Enhancement or Reduction by Surfactant Presence at a Gas−Liquid Interface journal January 2009
Deblurred Observation of the Molecular Structure of an Oil−Water Interface journal March 2005
Ions Speciation at the Water–Air Interface journal May 2023
Agglomeration Drives the Reversed Fractionation of Aqueous Carbonate and Bicarbonate at the Air–Water Interface journal September 2023
Insight into the Mechanisms Driving the Self-Assembly of Functional Interfaces: Moving from Lipids to Charged Amphiphilic Oligomers journal December 2019
Physical Chemistry of Airborne Sea Salt Particles and Their Components journal December 2000
Evaluation and Reparametrization of the OPLS-AA Force Field for Proteins via Comparison with Accurate Quantum Chemical Calculations on Peptides journal July 2001
Molecular Structure of the Water−Supercritical CO 2 Interface journal December 2001
C−H Stretching Vibrations of Methyl, Methylene and Methine Groups at the Vapor/Alcohol ( n = 1−8) Interfaces journal July 2005
Probing Molecular Structures of Poly(dimethylsiloxane) at Buried Interfaces in Situ journal February 2013
Liquid Interfaces:  A Study by Sum-Frequency Vibrational Spectroscopy journal April 1999
Chain Conformation of Poly(dimethyl siloxane) at the Air/Water Interface by Sum Frequency Generation journal August 2008
Gas Separation Membrane Materials: A Perspective journal September 2014
Second-order spectral lineshapes from charged interfaces journal October 2017
Direct air capture of CO2 via aqueous-phase absorption and crystalline-phase release using concentrated solar power journal May 2018
Models and mechanisms of Hofmeister effects in electrolyte solutions, and colloid and protein systems revisited journal January 2014
Understanding specific ion effects and the Hofmeister series journal January 2022
A roadmap for achieving scalable, safe, and low-cost direct air carbon capture and storage journal January 2023
A new approach to vibrational sum frequency generation spectroscopy using near infrared pulse shaping journal March 2019
Surface sum-frequency vibrational spectroscopy of nonpolar media journal April 2015
Quantitative spectral and orientational analysis in surface sum frequency generation vibrational spectroscopy (SFG-VS) journal April 2005
Nonlinear optical studies of liquid crystal alignment on a rubbed polyvinyl alcohol surface journal October 2000
Considerations in upconversion: A practical guide to sum-frequency generation spectrometer design and implementation journal March 2022
Probing liquid/liquid interfaces at and away from equilibrium using vibrational sum frequency generation conference October 2023
Direct Air Capture of CO2 Using Solvents journal June 2022
Membrane Contactors in Industrial Applications journal March 2005
Flexible approach to vibrational sum-frequency generation using shaped near-infrared light journal January 2018

Similar Records

Adsorption, Orientation, and Speciation of Amino Acids at Air–Aqueous Interfaces for the Direct Air Capture of CO2
Journal Article · Wed Jul 03 00:00:00 EDT 2024 · Langmuir · OSTI ID:2438886

Self-Assembled Oligomers Facilitate Amino Acid-Driven CO2 Capture at the Air–Aqueous Interface
Journal Article · Tue Jan 28 23:00:00 EST 2025 · Journal of Physical Chemistry. B · OSTI ID:2538300

Chemical Feedback in the Self-Assembly and Function of Air–Liquid Interfaces: Insight into the Bottlenecks of CO2 Direct Air Capture
Journal Article · Tue Mar 21 00:00:00 EDT 2023 · ACS Applied Materials and Interfaces · OSTI ID:1973348

Related Subjects