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Title: Evidence of molecular hydrogen trapped in two-dimensional layered titanium carbide-based MXene

Journal Article · · Physical Review Materials
 [1];  [1];  [2];  [3];  [1];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States); Univ. of Maryland, College Park, MD (United States)
  3. Drexel Univ., Philadelphia, PA (United States)

Two-dimensional transition metal carbides and nitrides (MXenes) are one of the largest and fastest growing families of materials. The presence of molecular hydrogen at ambient conditions in a MXene (Ti3C2Tx, where Tx represents a surface terminating species, including O, OH, and F) material is revealed here by inelastic and elastic neutron scatterings. The inelastic neutron-scattering spectrum measured at 5 K shows a peak at 14.6 meV, presenting a clear indication of the presence of parahydrogen in the MXene synthesized using 48% hydrofluoric acid and annealed at 110°C in vacuum prior to the measurement. An increase in the measurement temperature gradually reduces the peak intensity and increases the peak width due to the mobility of the molecular hydrogen in confinement. The presence of molecular hydrogen is confirmed further from the observed elastic intensity drop in a fixed energy-window scan of elastic intensity measurements in the temperature range of 10–35 K. Using milder etching conditions, ion intercalation, or an increase in the annealing temperature all result in the absence of the trapped hydrogen molecules in MXene. Here, the results of this paper can guide the development of MXene materials with desired properties and improve our understanding of the behavior of MXenes in applications ranging from supercapacitors to hydrogen evolution reaction catalysis and hydrogen storage.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Energy Frontier Research Centers (EFRC) (United States). Fluid Interface Reactions, Structures and Transport Center (FIRST)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1376464
Alternate ID(s):
OSTI ID: 1371611
Journal Information:
Physical Review Materials, Vol. 1, Issue 2; ISSN 2475-9953
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 26 works
Citation information provided by
Web of Science

References (46)

NMR reveals the surface functionalisation of Ti 3 C 2 MXene journal January 2016
The Combined Inelastic Neutron Scattering (INS) and Solid-State DFT Study of Hydrogen-Atoms Dynamics in Kaolinite-Dimethylsulfoxide Intercalate journal February 2010
Ion Intercalation into Two-Dimensional Transition-Metal Carbides: Global Screening for New High-Capacity Battery Materials journal October 2014
Mantid—Data analysis and visualization package for neutron scattering and μ SR experiments
  • Arnold, O.; Bilheux, J. C.; Borreguero, J. M.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 764 https://doi.org/10.1016/j.nima.2014.07.029
journal November 2014
DAVE: A Comprehensive Software Suite for the Reduction, Visualization, and Analysis of Low Energy Neutron Spectroscopic Data
  • Azuah, Richard Tumanjong; Kneller, Larry R.; Qiu, Yiming
  • Journal of Research of the National Institute of Standards and Technology, Vol. 114, Issue 6 https://doi.org/10.6028/jres.114.025
journal November 2009
ADSORBED LAYERS OF D 2 , H 2 , O 2 , AND 3 He ON GRAPHITE STUDIED BY NEUTRON SCATTERING journal October 1977
Preparation and hydrogen sorption of Pd nanoparticles on Al2O3 pillared clays journal July 1998
The rotational and translational dynamics of molecular hydrogen physisorbed in activated carbon: A direct probe of microporosity and hydrogen storage performance journal November 2006
SEQUOIA: A Newly Operating Chopper Spectrometer at the SNS journal November 2010
Inelastic neutron scattering studies of hydrogen bonding in ices journal October 1996
Two-Dimensional Nanocrystals Produced by Exfoliation of Ti3AlC2 journal August 2011
A comparison of four direct geometry time-of-flight spectrometers at the Spallation Neutron Source journal April 2014
Neutron spectroscopic investigation of dynamics of water ice journal June 2002
Vibrational Density of States of Strongly H-Bonded Interfacial Water: Insights from Inelastic Neutron Scattering and Theory journal May 2014
Two-Dimensional Molybdenum Carbide (MXene) as an Efficient Electrocatalyst for Hydrogen Evolution journal August 2016
The high-flux backscattering spectrometer at the NIST Center for Neutron Research journal May 2003
Intercalation and delamination of layered carbides and carbonitrides journal April 2013
The solid molecular hydrogens in the condensed phase: Fundamentals and static properties journal April 1980
Role of Surface Structure on Li-Ion Energy Storage Capacity of Two-Dimensional Transition-Metal Carbides journal April 2014
Quantum Tunneling of Water in Beryl: A New State of the Water Molecule journal April 2016
Cation Intercalation and High Volumetric Capacitance of Two-Dimensional Titanium Carbide journal September 2013
Direct experimental access to microscopic dynamics in liquid hydrogen journal August 2002
Observation of librational modes of water molecules in single crystal hydrates by neutron scattering journal April 1970
Atomic Defects in Monolayer Titanium Carbide (Ti 3 C 2 T x ) MXene journal September 2016
Characterisation of the adsorption sites of hydrogen on Pt/C fuel cell catalysts journal May 2006
Quantum dynamics of interstitial H 2 in solid C 60 journal September 1999
Nature of the Bound States of Molecular Hydrogen in Carbon Nanohorns journal May 2007
Strong Anisotropic Dynamics of Ultra-Confined Water journal August 2014
Synthesis of Two-Dimensional Materials by Selective Extraction journal December 2014
Fabrication of Ti 3 C 2 T x MXene Transparent Thin Films with Tunable Optoelectronic Properties journal April 2016
Quasi-Elastic Neutron Scattering Studies on Clay Interlayer-Space Highlighting the Effect of the Cation in Confined Water Dynamics journal August 2008
Neutron scattering study of H2 adsorption in single-walled carbon nanotubes journal November 2001
Resolving the Structure of Ti 3 C 2 T x MXenes through Multilevel Structural Modeling of the Atomic Pair Distribution Function journal December 2015
Atomic-Scale Recognition of Surface Structure and Intercalation Mechanism of Ti 3 C 2 X journal February 2015
MXene: A New Family of Promising Hydrogen Storage Medium journal December 2013
Physisorption and ortho–para conversion of molecular hydrogen on solid surfaces journal December 2013
The effect of hydrazine intercalation on the structure and capacitance of 2D titanium carbide (MXene) journal January 2016
Adsorption and melting of hydrogen in potassium-intercalated graphite journal February 2009
2D metal carbides and nitrides (MXenes) for energy storage journal January 2017
Characteristic features of water dynamics in restricted geometries investigated with quasi-elastic neutron scattering journal February 2016
Graphene, inorganic graphene analogs and their composites for lithium ion batteries journal January 2014
Molecular H2 trapped in AlH3 solid journal September 2008
An inelastic incoherent neutron scattering study of water in small-pored zeolites and other water-bearing minerals journal May 2000
Ion-Exchange and Cation Solvation Reactions in Ti 3 C 2 MXene journal May 2016
Probing the Mechanism of High Capacitance in 2D Titanium Carbide Using In Situ X-Ray Absorption Spectroscopy journal May 2015
Effect of Metal Ion Intercalation on the Structure of MXene and Water Dynamics on its Internal Surfaces journal March 2016

Cited By (2)

From the perspectives of DFT calculations, thermodynamic modeling, and kinetic Monte Carlo simulations: the interaction between hydrogen and Sc 2 C monolayers journal January 2020
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Figures / Tables (6)