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19 Sep 2024 • Journal Article • Chem Catalysis
Photothermal catalytic CO2 hydrogenation to methanol on Au/In2O3 nanowires
AbstractConverting CO2 into energy-rich fuels and high-value chemicals using solar energy is one of the sustainable solutions to mitigate reliance on fossil fuels, yet attaining the required conversion efficiency and selectivity to products such as methanol remains challenging. Here, we present In2O3 nanowires decorated with plasmonic Au nanoparticles with improved activity
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11 Sep 2024 • Journal Article • Journal of Materials Chemistry A
Optimization of misfit calcium cobaltite oxygen electrodes for solid oxide fuel cells through electrospinning processing
AbstractCurrent research in oxygen electrodes for Solid Oxide Fuel Cell applications underscores that the commercialization process of this technology remains severely limited by the poor oxygen reduction reaction performance of cathode materials. The misfit calcium cobalt oxide [Ca2CoO3−δ]0.62[CoO2] (CCO) presents a promising prospect in this regard, boasting fast surface-exchange
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6 Sep 2024 • Journal Article • IEEE Transactions on Artificial Intelligence
An Improved and Explainable Electricity Price Forecasting Model via SHAP-based Error Compensation Approach
AbstractForecasting errors in power markets, even as small as 1%, can have significant financial implications. However, even high-performance artificial intelligence (AI) based electricity price forecasting (EPF) models have instances when their prediction error is much higher than those shown by mean performance metrics. To date, explainable AI has been used to enhance the
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1 Sep 2024 • Journal Article • Journal of Turbomachinery
Impact of Flow Unsteadiness on Turbine Airfoil Heat Transfer via Streaming
AbstractAbstract. Thermal management of turbine airfoils is a critical design consideration, but the impact of unsteadiness on heat transfer of attached flow regions has received less attention in the literature. When turbine surfaces are subjected to unsteady zero-mean flow fluctuations, either naturally or artificially, the mean velocity around them is modified due to a
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1 Sep 2024 • Journal Article • Combustion and Flame
Large eddy simulation of plasma assisted ignition: Effects of pulse repetition frequency, number of pulses, and pulse energy
AbstractThe impacts of the pulse repetition frequency (PRF), number of pulses, and energy per pulse in a train of nanosecond discharge pulses on the ignition of a flowing lean premixed methane–air mixture are investigated using numerical simulations. A phenomenological plasma model coupled with a compressible reacting flow solver is used for these simulations. The simulation
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1 Sep 2024 • Journal Article • ChemSusChem
Studying the Effect of Operating Conditions and NO2 Cathode Contamination on PEM Fuel Cells Using Distribution Function of Relaxation Times Analysis
AbstractThe effect of NO2, an air pollutant, on the durability of polymer electrolyte membrane fuel cells (PEMFCs) and the affected electrochemical processes in the PEMFC following the contamination were investigated. In-situElectrochemical Impedance Spectroscopy (EIS) measurements were conducted on PEMFCs under different operating conditions of temperature and relative humidity
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30 Aug 2024 • Preprint • Social Science Research Network
Carbon Dioxide Sequestration Through Mineralization from Seawater: The Interplay of Alkalinity, Ph, and Dissolved Inorganic Carbon
AbstractMarine carbon dioxide removal technologies rely on the equilibration of the seawater with atmospheric CO2, where a pH increase can facilitate carbon dioxide removal either through increased absorption capacity of CO2, or precipitation of minerals. Here, we focus on explicitly defining the governing factors that influence seawater alkalinity with respect to
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29 Aug 2024 • Journal Article • ACS Organic & Inorganic Au
Anion-Exchange Membrane Oxygen Separator
AbstractAnion-exchange membranes (AEMs), known for enabling the high conductivity of hydroxide anions through dense polymeric structures, are pivotal components in fuel cells, electrolyzers, and other important electrochemical systems. This paper unveils an unprecedented utilization of AEMs in an electrochemical oxygen separation process, a new technology able to generate
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26 Aug 2024 • Journal Article • ChemSusChem
Hierarchically Porous Fe-N-C Single-atom Catalysts via Ionothermal Synthesis for Oxygen Reduction Reaction
AbstractPlatinum group metal (PGM)-free electrocatalysts have emerged as promising alternatives to replace Pt for the oxygen reduction reaction (ORR) in anion exchange membrane fuel cells (AEMFCs). However, traditional synthesis methods limit the single-atom site density due to metal agglomeration at higher temperatures. This work explores the preparation of hierarchically
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20 Aug 2024 • Journal Article • Journal of Catalysis
Correlative in situ analysis of the role of oxygen on ammonia electrooxidation selectivity on NiOOH surfaces
AbstractThe electrochemical ammonia oxidation reaction (AOR) offers a promising pathway for environmental remediation, energy conversion, and the production of value-added chemicals. Although NiOOH shows potential as an efficient catalyst for AOR, the underlying mechanism and the influence of the concurrent oxygen evolution reaction (OER) are not yet fully understood. Here, the
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