A5083773115- Fuel Cells and Related Materials
- Semiconductor materials and devices
- Electrocatalysts for Energy Conversion
- Electronic and Structural Properties of Oxides
- Hybrid Renewable Energy Systems
- Hydrogen Storage and Materials
- Membrane-based Ion Separation Techniques
- Ferroelectric and Piezoelectric Materials
- Chemical and Physical Properties of Materials
- Chemical Looping and Thermochemical Processes
- Advanced ceramic materials synthesis
- Thermal Expansion and Ionic Conductivity
- Shape Memory Alloy Transformations
- Advancements in Solid Oxide Fuel Cells
- Surface and Thin Film Phenomena
- Metal Extraction and Bioleaching
- Intermetallics and Advanced Alloy Properties
- Advanced Materials Characterization Techniques
- Advanced battery technologies research
- Nuclear materials and radiation effects
- Ion-surface interactions and analysis
- Electron and X-Ray Spectroscopy Techniques
- Magnetic and transport properties of perovskites and related materials
- nanoparticles nucleation surface interactions
- ZnO doping and properties
Sandia National Laboratories California
2023-2025
Sandia National Laboratories
2023
Oregon State University
2019-2023
Rogers (United States)
2020
University of North Texas
2018-2019
Anion exchange membrane water electrolysis (AEMWE) is an emerging technology for the low-cost production of hydrogen. However, efficiency and durability AEMWE devices currently insufficient to compete with other low-temperature technologies. The porous transport layer (PTL) a critical cell component that remains relatively unoptimized AEMWE. In this study, we demonstrate device performance significantly affected by morphology composition PTL. For Ni fiber-based PTLs ∼2 μm Co3O4 oxygen...
The A-site high-entropy perovskite oxide (La 1/6 Pr Nd Gd Sr Ba )MnO 3 with enhanced hydrogen production, phase stability, and surface oxygen exchange kinetics, offering the potential for tailoring properties in STCH application.
While anion exchange membrane water electrolyzers (AEMWEs) have achieved significant performance advances in recent decades, overpotentials remain high relative to their proton electrolyzer (PEMWE) counterparts, requiring AEMWE-specific catalyst layer design strategies further advance this technology. In work, the role of ionomer structure and quality, stability, ion conduction for supporting electrolyte-fed AEMWEs is assessed layers composed NiFe2O4 PiperION TP85 from Versogen at variable...
Hydrogen has unique advantages as an energy carrier due to its high density and abilities in long-term storage convert between chemical bonds electricity. [1] Although hydrogen currently a small role pathways, decreasing electricity prices can allow for significant growth. Anion-exchange-membrane water electrolysis (AEMWE) holds promise reaching reduced production cost targets, particularly from materials perspective, is the primary technology pathway being studied under Low Temperature...
In low temperature electrolysis, anion exchange membrane (AEM) systems combine the advantages of alkaline and proton (PEM) electrolysis in generating high purity hydrogen reducing material costs from catalysts component coatings [1]. Recent studies AEM have focused on improving cell performance, minimizing catalyst dissolution mitigating ionomer/membrane degradation with different operating conditions. Ionomers play a critical role electrode because they provide ion conductivity, enhance...
Anion exchange membrane water electrolysis (AEMWE) is a promising technology for the low-cost production of green hydrogen. However, significant improvements in components and component integration are needed to improve efficiency lifetime AEMWE devices. [1] The anode catalyst layer critical activity due large overpotentials associated with sluggish kinetics oxygen evolution reaction (OER) durability highly oxidizing environment that can lead polymer degradation. anodic overpotential be...
Anion exchange membrane water electrolyzers (AEMWE) have gained recent attention as a promising low temperature H 2 O electrolysis technology that combines the benefits of commercial liquid alkaline and proton (PEMWE), while alleviating concerns over capital cost materials criticality associated with these existing technologies. 1,2 While AEMWEs achieved significant performance advances in decades, overpotentials remain high relative to PEMWE counterparts, requiring AEMWE-specific catalyst...
The atomic-level structure of interfaces between Pt and θ-Al2O3 were studied using a combination electron microscopy first principles calculations. A model system nanoprecipitates in formed sapphire wafers via high-energy ion implantation followed by thermal annealing at 1000°C air. nanoparticles took the form tetrahedra truncated primarily bound {111}Pt facets. high prevalence these facets motivated development density functional theory (DFT) based models (111)Pt||(201)θ with six different...
Solar thermochemical hydrogen (STCH) production uses concentrated sunlight to produce using reduction/oxidation of metal oxides. Typically, the oxide is heated high temperature (>1400 o C) causing it release oxygen, then cooled a lower (<1000 in steam whereby re-oxidizes, stripping oxygen from water molecules and producing hydrogen. Due improved stability, non-stoichiometric oxides that do not change phase during STCH process are typically used, even though reversible content less than...
As an energy carrier, hydrogen has unique advantages due to its high density, ability for long-term storage, and the convert between chemical bonds electricity. [1] Although currently a small role in pathways, low-cost renewable power sources can allow significant growth. Anion exchange membrane (AEM) electrolyzers leverage several advantages, including zero-gap approach that typically improves upon efficiency of traditional alkaline systems. [2] Compared proton (PEM) electrolyzers, pH also...
The atomic-level structure of platinum/γ-alumina interfaces is characterized in a model system dense γ-alumina embedded with faceted Pt NPs produced by implantation platinum ions into sapphire followed thermal annealing air at 800°C. Aberration-corrected scanning transmission electron microscopy (STEM) was used to collect atomic-resolution images, which are compared STEM image simulations two experimentally-based bulk models Smrčok et al. and Zhou Snyder. A density functional theory (DFT)...