A5062626413- Control Systems and Identification
- Fault Detection and Control Systems
- Advanced Control Systems Optimization
- Probabilistic and Robust Engineering Design
- Numerical Methods and Algorithms
- Catalytic Processes in Materials Science
- Earthquake Detection and Analysis
- Catalysis and Oxidation Reactions
- Optimal Experimental Design Methods
- Advanced Multi-Objective Optimization Algorithms
- Ionosphere and magnetosphere dynamics
- Seismic Waves and Analysis
- Crystallization and Solubility Studies
- Radioactive element chemistry and processing
- X-ray Diffraction in Crystallography
- Methane Hydrates and Related Phenomena
- Target Tracking and Data Fusion in Sensor Networks
- Geophysics and Gravity Measurements
- Advanced battery technologies research
- Advanced NMR Techniques and Applications
- Electrocatalysts for Energy Conversion
- Zeolite Catalysis and Synthesis
- Nanomaterials for catalytic reactions
- Advanced Battery Materials and Technologies
- NMR spectroscopy and applications
Pacific Northwest National Laboratory
2016-2025
Environmental Molecular Sciences Laboratory
2016-2025
Battelle
2012-2024
Technische Universität Berlin
2024
Williams (United States)
2024
William & Mary
2024
John Wiley & Sons (United States)
2016-2022
Government of the United States of America
2022
Kaiser Permanente Center for Health Research
2022
Kaiser Permanente
2022
The hydrothermal stability of Cu/SSZ-13 SCR catalysts has been extensively studied, yet atomic-level understanding changes to the zeolite support and Cu active sites during aging are still lacking. In this work, via utilization spectroscopic methods including solid-state 27Al 29Si NMR, EPR, DRIFTS, XPS, together with imaging elemental mapping using STEM, detailed kinetic analyses, theoretical calculations DFT, various species, two types isolated CuOx clusters, were precisely quantified for...
Abstract Nonaqueous redox flow batteries hold the promise of achieving higher energy density because broader voltage window than aqueous systems, but their current performance is limited by low material concentration, cell efficiency, cycling stability, and density. We report a new nonaqueous all‐organic battery based on high concentrations materials, which shows significant, comprehensive improvement in performance. A mechanistic electron spin resonance study reveals that choice supporting...
This survey of model-based fault diagnosis focuses on those methods that are applicable to aerospace systems. To highlight the characteristics models, generic non-linear dynamical modelling from flight mechanics is recalled and a unifying representation sensor actuator faults presented. An extensive bibliographical review supports description key points detection rely analytical redundancy. The approaches best suit constraints field emphasized recommendations for future developments in...
The ability to predict the solubility and stability of lithium polysulfide is vital in realizing longer lasting lithium-sulfur batteries. Herein we report combined experimental computational analyses understand dissolution mechanism species an aprotic solvent medium. Multinuclear NMR, variable temperature ESR sulfur K-edge XAS reveal that exchange between molecules constitutes first step process. Lithium leads de-lithiated ions (Sn(2-)) which subsequently form highly reactive free radicals...
Lithium sulfur (Li-S) battery has been regaining tremendous interest in recent years because of its attractive attributes such as high gravimetric energy, low cost and environmental benignity. However, it is still not conclusively known how polysulfide ring/chain participates the whole cycling whether discharge charge processes follow same pathway. Herein, we demonstrate direct observation radicals by using situ electron paramagnetic resonance (EPR) technique. Based on concentration changes...
Engineering suitable redox molecules In a flow battery, catholyte and anolyte are stored in separate tanks, pumps used to circulate the fluids into stack with electrodes separated by thin membrane. Such batteries ideal for large-scale grid storage applications; however, currently limited. Feng et al. “molecular engineering” modify an inexpensive precursor (9-fluorenone) as basis organic-based battery (see Perspective Hu Liu). The authors tested series of variant which reactions involve...
Redox-active organic materials (ROMs) have shown great promise for redox flow battery applications but generally encounter limited cycling efficiency and stability at relevant material concentrations in nonaqueous systems. Here we report a new heterocyclic anolyte molecule, 2,1,3-benzothiadiazole, that has high solubility, low potential, fast electrochemical kinetics. Coupling it with benchmark catholyte ROM, the demonstrated significant improvement cyclable cell efficiencies compared to...
The prion protein (PrP) binds Cu2+ in its N-terminal octarepeat domain. This unusual domain is comprised of four or more tandem repeats the fundamental sequence PHGGGWGQ. Previous work from our laboratories demonstrates that at full copper occupancy, each HGGGW segment a single Cu2+. However, several recent studies suggest low occupancy favors different coordination modes, possibly involving imidazoles histidines adjacent octapeptide segments. investigated here using combination X-band EPR,...
SAPO-34 molecular sieves are synthesized using various structure directing agents (SDAs). Cu-SAPO-34 catalysts prepared via aqueous solution ion exchange (IE). Catalysts characterized with surface area/pore volume measurements, temperature programmed reduction (TPR), electron paramagnetic resonance (EPR), and nuclear magnetic (NMR) spectroscopies. Catalytic properties examined standard ammonia selective catalytic (NH3–SCR) oxidation reactions. During IE, different samples undergo extent of...
A method is described which exactly characterizes the set of all values parameter vector a linear model that are consistent with bounded errors on measurements. It provides parameterized expression this set, can be used for robust control design or optimizing any criterion over set. This approach based new variant double description determining edges polyhedral cone. in real time and suitable context implementation computer. Whenever measurement modifies characterization updated. The...