A5079102008- Fuel Cells and Related Materials
- Toxic Organic Pollutants Impact
- Electrocatalysts for Energy Conversion
- Groundwater flow and contamination studies
- Molten salt chemistry and electrochemical processes
- Advancements in Solid Oxide Fuel Cells
- Advanced battery technologies research
- Solid-state spectroscopy and crystallography
- Inorganic Fluorides and Related Compounds
- Atmospheric chemistry and aerosols
- Environmental Toxicology and Ecotoxicology
- Microbial bioremediation and biosurfactants
- Crystal Structures and Properties
- Water Quality and Resources Studies
- Groundwater and Isotope Geochemistry
- Hybrid Renewable Energy Systems
- Advanced Battery Materials and Technologies
- Phase-change materials and chalcogenides
- Urban Stormwater Management Solutions
- Membrane-based Ion Separation Techniques
- Air Quality and Health Impacts
- Heavy metals in environment
- Radioactive contamination and transfer
- Water Quality and Pollution Assessment
- Atmospheric and Environmental Gas Dynamics
University of Wisconsin–Milwaukee
2010-2025
Technical University of Denmark
2012-2024
Center of Research and Technologic Development in Electrochemistry
2019
Proton (United Kingdom)
2012-2014
Queensland Health
2013
University of Illinois Urbana-Champaign
2011
University of Southern California
2007-2010
University of Wisconsin–Madison
2007
Clemson University
2005
Thammasat University
1999
Polymer membranes imbibed with KOH represent a novel way to achieve ionic conductivity and show promise for alkaline electrolyzers.
Phosphoric acid doped polybenzimidazole (PBI) has emerged as one of the most promising electrolyte materials for proton exchange membrane (PEM) fuel cells operating under anhydrous conditions at temperatures up to 200 °C. The limited long-term durability electrode assemblies (MEAs) is currently hampering commercial viability technology. In present study, thermoset PBI membranes were prepared by curing inert atmosphere 350 °C prior doping. systematic characterizations with respect solubility,...
Membranes based on poly(2,2'-(m-phenylene)-5,5-bibenzimidazole) (m-PBI) can dissolve large amounts of aqueous KOH to give electrolyte systems with ion conductivity in a practically useful range. The the membrane strongly depends concentration phase, reaching about 10−1 S cm−1 or higher 15–25 wt% KOH. Herein, m-PBI membranes are systematically characterized respect performance and short-term stability as zero-gap alkaline water electrolyzer at different concentrations. Using plain uncatalyzed...
A model for the activity of radionuclides in sediments has been set up based on one‐dimensional advection‐diffusion equation. The considers sedimentation, mixing, and compaction. Observed distributions deposit‐feeding organisms, nature physical disturbances, indicate that a gaussian diffusion coefficient may be appropriate. Two‐layer models with constant respectively, upper layer are compared measured Pb 210 profiles two cores from Green Bay, Lake Michigan, it is found maximal D 0...
Proton exchange membrane steam electrolyzers suffer from insufficient catalyst activity and durability due to the slow reaction kinetics for oxygen evolution (OER) poor under harsh operating environments. Aiming at enhancement of electrode durability, composite support materials iridium oxide are synthesized via in situ phosphorization on tin doped indium possess functionalities high electronic intrinsic proton conductivity. At 130 °C a water vapor atmosphere an overall conductivity 0.72 S...
A factor analysis model with nonnegative constraints (FA) was used to apportion the sources of PAHs found in sediments Lake Calumet and surrounding wetlands southeast Chicago. Source profiles contributions, uncertainties, are determined no prior knowledge sources. The includes scaling backscaling data average PAH concentrations without sample normalization. This work is a follow-up study that chemical mass balance (CMB8.2) same set. Literature source profiles, modified based on gas/particle...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEcotoxicological assays with algae: Weibull dose-response curvesErik R. Christensen and Niels. NyholmCite this: Environ. Sci. Technol. 1984, 18, 9, 713–718Publication Date (Print):September 1, 1984Publication History Published online1 May 2002Published inissue 1 September 1984https://pubs.acs.org/doi/10.1021/es00127a014https://doi.org/10.1021/es00127a014research-articleACS PublicationsRequest reuse permissionsArticle...
Four sediment cores were collected from Lake Hartwell, SC, in 1987 and 1998 analyzed for polychlorinated biphenyl (PCB) congeners. Total PCBs ranged ∼0 to 58 μg/g. Positive matrix factorization (PMF) was applied the data sets determine PCB source profiles. Two factors determined each set. One factor resembled original estimated mixture of 80% Aroclor 1016 20% 1254 other a dechlorinated version mixture. Evidence dechlorination plateau is apparent PMF loading solutions because congener...
Nine sediment cores were collected from the Sheboygan River Inner Harbor, WI, and analyzed for polychlorinated biphenyl (PCB) congeners. Total PCBs ranged ∼0 to 161 mg/g. Positive matrix factorization (PMF) was applied PCB data set determine source profiles. Two factors determined be significant. One factor resembled original approximated mixture of 50% Aroclor 1248 1254 other a dechlorinated version mixture. An anaerobic dechlorination model profiles quantify possible pathways. It found...