A5077308626- Hydrocarbon exploration and reservoir analysis
- Zeolite Catalysis and Synthesis
- Catalysis and Hydrodesulfurization Studies
- MXene and MAX Phase Materials
- Hydraulic Fracturing and Reservoir Analysis
- Supercapacitor Materials and Fabrication
- Layered Double Hydroxides Synthesis and Applications
- NMR spectroscopy and applications
- Polyoxometalates: Synthesis and Applications
- 2D Materials and Applications
- Thermal and Kinetic Analysis
- Advanced battery technologies research
- X-ray Diffraction in Crystallography
- Catalytic Processes in Materials Science
- Graphene research and applications
- Catalysis and Oxidation Reactions
- Metal-Organic Frameworks: Synthesis and Applications
- Extraction and Separation Processes
- Advancements in Battery Materials
- Lanthanide and Transition Metal Complexes
- Aortic Disease and Treatment Approaches
- Coronary Interventions and Diagnostics
- Additive Manufacturing and 3D Printing Technologies
- Crystal Structures and Properties
- Coal Properties and Utilization
Washington State University
2019-2025
Los Alamos National Laboratory
2019-2025
Lawrence Livermore National Laboratory
2023-2025
New Mexico State University
2020
MXenes, most commonly transition metal carbides, are a family of two-dimensional (2D) materials with promising potential in, among other applications, supercapacitors and batteries. MXenes synthesized by etching aluminum or gallium layers in its parent MAX phase directly HF situ formation using fluoride salt strong acid. A undesired byproduct MXene synthesis is AlF3·3H2O. To relieve from AlF3·3H2O impurity, it important to elucidate the factors that drive formation. Here, we dually deduce...
MXenes are ultra-thin two-dimensional layered early transition-metal carbides and nitrides with potential applications in various emerging technologies, such as energy storage, water purification, catalysis. synthesized from the parent MAX phases different etching agents [hydrofluoric acid (HF) or fluoride salts a strong acid] by selectively removing more weakly bound crystalline layer of Al Ga replaced surface groups (-O, -F, -OH, etc.). Ti3C2Tx MXene CoF2/HCl has heterogeneity due to...
Abstract Compared with batteries, the advantages of capacitive energy storage include high power, fast charging kinetics, and long cycling stability. Owing to their layered structure tunable transition metal charge, double hydroxides (LDHs) have great potential be applied as pseudocapacitor materials. Here, a systematic experimental study is reported on impact Ni/Al ratio structure, morphology, ion transport interlayer phenomena, performance NiAl‐LDH supercapacitor electrode materials, in...
The Negev desert in Israel is home to large quantities of organic-rich, shallow marine sedimentary lithologies that could potentially accommodate the disposal spent nuclear fuel. Previous thermal analyses carbonates have focused on industrially relevant considerations such as natural gas and oil extraction or pyrolysis for recovering hydrocarbon fuels. This study addresses evolution organic-rich carbonate, siliceous, phosphorite rocks associated chemical, mineralogical, microstructural...
In this study, we investigate the curing reaction kinetics and degree of cross-linking LL50, a polydimethylsiloxane (PDMS)-based polymer, using isothermal heat flow calorimetry (HFC). developed by Lawrence Livermore National Laboratory, is two-part addition-curing liquid silicone rubber for direct-ink-writing additive manufacturing. The process, driven platinum-catalyzed hydrosilylation reaction, was monitored under conditions at various temperatures. We kinetic model to predict rate extent...
Molten salt reactors (MSRs) are a promising alternative to conventional nuclear as they may offer more efficient fuel utilization, lower waste generation, and improved safety. The state of knowledge the properties liquid salts is far from complete. In order develop MSR concept, it essential fundamental understanding thermodynamic properties, including heat capacities (Cp) enthalpies mixing (ΔHmix), molten at operating conditions. Historically, Cp values were determined by drop-calorimetry or...
Unconventional oil and gas from shale formations have emerged as some of the fastest growing energy resources in United States, providing both cleaner to consumers reducing nation's reliance on imports. To properly harness these important natural resources, nanopore structure associated shales must be fully understood, particularly under hydraulic fracturing conditions, where they are exposed overburden compressive hydrostatic fluid pressures. The current study uses small-angle neutron...
Small-diameter vascular grafts perform poorly as arterial bypasses. We developed a cell-free, resorbable graft intended to remodel in situ into living vessel. The consisted of soft electrospun poly(glycerol sebacate) (PGS) core, PGS prepolymer (pPGS) coating, and reinforcing poly(ε-caprolactone) (PCL) sheath. core contained 4.37 ± 1.95 μm fibers had porosity 66.4 3.2%, giving it large pores encourage cellular infiltration pro-healing macrophages. sheath 6.63 0.89 80.5 2.1%. vitro testing...
Defining the energetic landscape of pseudocapacitive materials such as transition metal layered double hydroxides (LDHs) upon redox-site enrichment is essential to harnessing their power for effective energy storage. Here, coupling acid solution calorimetry, in situ XRD, and DRIFTS, we demonstrate that Ni/Al ratio increases, both as-made (hydrated) dehydrated NiAl-LDH samples are less stable evidenced by enthalpies formation. Moreover, higher specific capacity at an intermediate 3 enabled...
Low-temperature anaerobic methane conversion to methanol (MTM) using copper ion-exchanged mordenite (Cu-MOR) as the catalyst and water sole source of oxygen is promising for sustainable utilization methane. Integrating in situ calorimetric, spectroscopic, structural methodologies, we report a systematic study on energetics water-cationic species-framework guest-host interactions function loading several mordenites relevant low-temperature MTM. Notably, near-zero coverage hydration enthalpy...
Understanding the stability of porous materials, especially metal–organic frameworks (MOFs), is central to defining their applications in gas storage, separation, and catalysis. Herein, integrating high-temperature drop combustion calorimetry as well simultaneous thermal situ structural analyses, we performed a comprehensive study on thermodynamic, thermal, stabilities MOF air. A family MIL-53 (Al1–xCrx) with systematically tuned metal contents was intentionally chosen considering unique...
Shale rock is a complex geochemical system, which contains inorganic minerals and organic matter (e.g., kerogen), of the latter possesses porous, high-molecular-weight carbon structures. The pores within hold majority recoverable unconventional oil natural gas. also provides possible source hydrocarbon fuel upon pyrolysis. To promote engineering developments in recovery using heating methods, it essential to have fundamental understanding nature thermal behavior shale. Consequently, we...
Once confined in zeolites, carbides of inexpensive transition metals, such as molybdenum (Mo) and tungsten (W), exhibit similar catalytic activity platinum group noble metals. Thus far, the intrinsic thermodynamic properties their relations with local interfacial phenomena carbide–zeolite heterogeneous materials have rarely been explored. Here, employing high temperature oxide melt solution calorimetry, for first time, we determined energetics carbide (Mo2C) formation under confinement...
Abstract Zeolites with encapsulated transition metal species are extensively applied in the chemical industry as heterogenous catalysts for favorable kinetic pathways. To elucidate energetic insights into formation of subnano‐sized molybdenum trioxide (MoO 3 ) encapsulated/confined zeolite Y (FAU) from constituent oxides, we performed a systematic experimental thermodynamic study using high‐temperature oxide melt solution calorimetry major tool. Specifically, enthalpy each MoO /FAU is less...
Cobalt(II) fluoride (α-CoF2) has potential for application as a high-performance electrode material in lithium-ion batteries. α-CoF2 is synthesized by the thermal heat treatment of CoF2·4H2O, commonly an aqueous environment. There exists disagreement literature upon mechanism, intermediate hydration states, and temperatures reaction. Here, we resolve this discontinuity using integrated structural, thermogravimetric, calorimetric analyses to elucidate dehydration pathway CoF2·4H2O both ex...
Many material properties of the insensitive high explosive TATB (1,3,5-triamino-2,4,6- trinitrobenzene) exhibit pronounced anisotropy due to its graphitic-like layered crystal packing structure. This structure evokes a mental schema in which layers form nanoscopic channels, but very little is known regarding permeability lattice by small molecules. We use molecular dynamics (MD) simulations obtain predictions for diffusion molecules through single crystal. An approach fit classical MD force...
Defining the energetic landscape of pseudocapacitive materials such as transition metal layered double hydroxides (LDHs) upon redox site enrichment is essential to harness their power for effective energy storage. Here, coupling acid solution calorimetry, in situ XRD, and DRIFTS, we demonstrate that Ni/Al ratio increases, both as-made (hydrated) dehydrated NiAl-LDH samples are less stable evidenced by enthalpies formation. Moreover, higher specific capacity at intermediate 3 enabled water –...
MXenes are ultra-thin two-dimensional layered early-transition metal carbides and nitrides with potential applications in various emerging technologies, such as energy storage, water purification, catalysis. synthesized from the parent MAX phase different etching agents (HF or fluoride salts a strong acid) by selectively removing more weakly bound crystalline layer of Al Ga replaced surface groups (-O, -F, -OH, etc.). Ti3C2Tx MXene CoF2/HCl has heterogeneity due to intercalated Al3+ Co2+...
Zeolites with encapsulated transition metal species are extensively applied in the chemical industry as heterogenous catalysts for favorable kinetic pathways. To elucidate energetic insights into formation of subnano-sized molybdenum trioxide (MoO3) encapsulated/confined zeolite Y (FAU) from constituent oxides, we performed a systematic experimental thermodynamic study using high temperature oxide melt solution calorimetry major tool. Specifically, enthalpy each MoO3/FAU is less endothermic...