A5078299343- Catalytic Processes in Materials Science
- Electrocatalysts for Energy Conversion
- Advanced Chemical Physics Studies
- Surface Chemistry and Catalysis
- Catalysis and Hydrodesulfurization Studies
- Catalysis for Biomass Conversion
- Catalysis and Oxidation Reactions
- Catalysts for Methane Reforming
- nanoparticles nucleation surface interactions
- Molecular Junctions and Nanostructures
- Additive Manufacturing and 3D Printing Technologies
- Chemical and Physical Properties of Materials
- Copper-based nanomaterials and applications
- Machine Learning in Materials Science
- Polymer Nanocomposite Synthesis and Irradiation
- Surface and Thin Film Phenomena
- ZnO doping and properties
- Conducting polymers and applications
- Fuel Cells and Related Materials
- Material Properties and Applications
- Advanced Physical and Chemical Molecular Interactions
- Mechanical Engineering and Vibrations Research
Brookhaven National Laboratory
2024-2025
University of Illinois Chicago
2020-2022
Reducing iridium (Ir) catalyst loading for acidic oxygen evolution reaction (OER) is a critical strategy large-scale hydrogen production via proton exchange membrane (PEM) water electrolysis. However, simultaneously achieving high activity, long-term stability, and reduced material cost remains challenging. To address this challenge, we develop framework by combining density functional theory (DFT) prediction using model surfaces proof-of-concept experimental verification thin films...
Synchrotron-based ambient-pressure X-ray photoelectron spectroscopy (AP-XPS) was used to study the adsorption and surface chemistry of methanol on a Cu3Pd(111) model surface. The composition morphological properties pristine substrate were analyzed using combination low-energy electron diffraction (LEED), scanning tunneling microscopy (STM), ion scattering (LEIS). results showed segregation Pd toward surface, with Pd/Cu ratio close 0.5, larger value than 0.33 expected for Cu3Pd bimetallic...
To design and optimize cost-effective technologies for the capture, utilization, storage of carbon dioxide (CO2), we need fundamental knowledge control chemical interactions associated with capture conversion molecule into high-value chemicals, minerals, all kinds materials. Bulk magnesium oxide (MgO) is frequently used trapping CO2 by generation carbonates. In this study, growth reactivity MgO nanostructures on a Cu2O/Cu(111) substrate were investigated using scanning tunneling microscopy...
The hydrogenation of acrolein on the Ag(111) and Pd/Ag(111) single-atom alloy (SAA) surfaces was studied using temperature-programmed reaction spectroscopy. On Ag(111), percent conversion increased with increasing atomic hydrogen coverage. At an coverage 0.17 ML followed by a low exposure to hydrogen, highest selectivity 2-propenol reached at 19%. However, caused decrease propanal increase maximum 92%. In all cases, decreased 2-propenol. 1-propanol constant only 1%. Activity SAA were...
Reflection absorption infrared spectroscopy and temperature programmed desorption were used to study the adsorption of acrolein, its partial hydrogenation products, propanal 2-propenol, full product, 1-propanol on Ag(111) surface. Each molecule adsorbs weakly surface desorbs without reaction at temperatures below 220 K. For out-of plane bending modes are more intense than C[double bond, length as m-dash]O stretch all coverages, indicating that molecular is mainly parallel The two alcohols,...
The direct conversion of carbon dioxide (CO2) into methanol (CH3OH) via low-temperature hydrogenation is crucial for recycling anthropogenic CO2 emissions and producing fuels or high value chemicals. Nevertheless, it continues to be a great challenge due the trade-off between selectivity catalytic activity. For hydrogenation, In2O3 catalysts are known their CH3OH selectivity. Subsequent studies explored depositing metals on enhance conversion. Despite extensive research metal (M) supported...
The structures of Pd islands at three different coverages (0.028, 0.064, and 0.150 monolayer (ML)) on Ag(111) were studied room temperature with scanning tunneling microscopy (STM). While previous studies have shown that the structure composition change elevated temperatures, we found Ag atoms migrate to cover even temperature. These occupy sites in middle islands, second layer growth begins these sites. migration leads formation vacancy terraces. Upon annealing 340 K, majority are...
The efficient conversion of methane into valuable hydrocarbons, such as ethane and ethylene, at relatively low temperatures without deactivation issues is crucial for advancing sustainable energy solutions. Herein, AP-XPS STM studies show that MgO nanostructures (0.2-0.5 nm wide, 0.4-0.6 Å high) embedded in a Cu
Reflection absorption infrared spectroscopy (RAIRS) has been used to show that under pressures of 5–100 nTorr, propyne adsorbs reversibly at room temperature on the Cu(111) surface. The pressure dependence coverage, based RAIRS peak areas, was found follow a Langmuir isotherm. From fits isotherms, equilibrium constants for adsorption were determined temperatures from 300.0 307.5 K. van't Hoff plots constant, heat −120 ± 27 kJ mol–1 and an entropy change −171 88 J K–1 determined. These values...
The adsorption of acrolein and its hydrogenation products propanal, 1-propanol, 2-propenol on Cu(111) was studied by reflection absorption infrared spectroscopy (RAIRS) temperature-programmed desorption (TPD). experimental RAIR spectra were obtained adsorbing multilayers each molecule at 85 K then annealing the surface up to 200 desorb multilayer produce most stable monolayer structure surface. Each four molecules adsorbs weakly desorbs temperatures below 225 K. Compared two alcohols, have...