A5077119935- Catalytic Processes in Materials Science
- Electrocatalysts for Energy Conversion
- Catalysis and Oxidation Reactions
- Nanomaterials for catalytic reactions
- Fuel Cells and Related Materials
- Advanced battery technologies research
- Electrochemical Analysis and Applications
- Advanced Photocatalysis Techniques
- Zeolite Catalysis and Synthesis
- Analytical Chemistry and Sensors
- Machine Learning in Materials Science
- Catalysis and Hydrodesulfurization Studies
- Membrane Separation and Gas Transport
- Mesoporous Materials and Catalysis
- Carbon Dioxide Capture Technologies
- Molecular Sensors and Ion Detection
- Metal-Organic Frameworks: Synthesis and Applications
- Nanocluster Synthesis and Applications
- Catalysis for Biomass Conversion
Leiden University
2020-2024
Northwestern University
2022-2024
Purdue University West Lafayette
2016-2022
University of Michigan
2015
Copper ions exchanged into zeolites are active for the selective catalytic reduction (SCR) of nitrogen oxides (NO x ) with ammonia (NH3), but low-temperature rate dependence on copper (Cu) volumetric density is inconsistent reaction at single sites. We combine steady-state and transient kinetic measurements, x-ray absorption spectroscopy, first-principles calculations to demonstrate that under conditions, mobilized Cu can travel through zeolite windows form ion pairs participate in an oxygen...
The relationships among the macroscopic compositional parameters of a Cu-exchanged SSZ-13 zeolite catalyst, types and numbers Cu active sites, activity for selective catalytic reduction (SCR) NOx with NH3 are established through experimental interrogation computational analysis materials across catalyst composition space. Density functional theory, stochastic models, characterizations demonstrate that within synthesis protocols applied here Si:Al ratios, volumetric density six-membered-rings...
CALF-20, a Zn-triazolate-based metal–organic framework (MOF), is one of the most promising adsorbent materials for CO2 capture. However, competitive adsorption water severely limits its performance when relative humidity (RH) exceeds 40%, limiting potential implementation CALF-20 in practical settings where saturated with moisture, such as postcombustion flue gas. In this work, three newly designed MOFs related to denoted NU-220, CALF-20M-w, and CALF-20M-e that feature hydrophobic...
Theory and experiment reveal relationships between observed UV-visible spectra ion exchange site types, nuclearity, finite-temperature dynamics in Cu exchanged chabazite (SSZ-13) zeolites.
Cu in aged zeolites changes structure during SCR.
The production of hydrogen via water electrolysis using renewable electricity is a promising carbon-neutral technology. In this contribution, we report insights into the evolution reaction (HER) in H2SO4 on Pt(111) and graphene-covered Pt(111), addition to electrochemical properties graphene overlayers. As-prepared overlayers are selectively permeable H+ ions electrolyte, allowing confined layer between while excluding SO42– other anions. We demonstrate that defects these as-prepared can be...
In this contribution, we synthesized three model Cu-SSZ-13 catalysts with primarily ZCuOH, Z2Cu, and extraframework CuxOy species then measured their N2O formation rates during standard selective catalytic reduction (SCR). We first present evidence that the of after sequential aqueous ion exchange calcination correlates Cu(OH)2 precipitates exchange. These are not active for SCR, unchanged apparent activation energies reaction orders demonstrate these do induce transport limitations to...
Dihydroxyacetone (DHA) and glyceraldehyde (GA)—the simplest monosaccharides in nature—are both essential building blocks organic synthesis. There have been detailed investigations on the selective production of DHA GA through platinum-catalyzed electrochemical oxidation glycerol, which is a surplus byproduct from biodiesel. However, less attention has paid to behavior themselves. Here, we report reduction at different pH platinum palladium electrodes. Palladium exhibits superior activity...
Trace impurities of nitrate and sulphate species have been detected as the cause for charge quench existing voltametric peaks appearance new voltammetric in blank voltammetry Pt(111) high-purity perchloric acid. Cyclic high concentrations HClO4 (1 M) electrolyte display anomalous reduction at 0.5 0.32 VRHE. The nitrates to nitric oxide, resulting peak VRHE, has using situ Fourier transform infrared spectroscopy. previously assigned literature specific adsorption perchlorate anions...
Trace impurities of nitrate and sulphate species have been detected as the cause for charge quench existing voltametric peaks appearance new voltammetric in blank voltammetry Pt(111) high-purity perchloric acid. Cyclic high concentrations HClO4 (1 M) electrolyte show anomalous reduction at 0.5 0.32 VRHE. The nitrates to nitric oxide, resulting peak VRHE, has using situ Fourier transform infrared spectroscopy. previously assigned literature specific adsorption perchlorate anions catalytically...
The development of industrial electrocatalysts with excellent performance in fuel cells strongly relies on the fundamental understanding governing principles catalysis from research well-defined model systems. One particularly successful strategy has been to tune surface strain and thereby modulate electronic structure energetics reaction intermediates, leading a identification catalysts improved activity. For well-known example oxygen reduction (ORR) platinum cells, previous studies...
The production of hydrogen through water electrolysis using renewable electricity is a promising carbon-neutral technology. We present insights into the evolution reaction (HER) in aqueous H 2 SO 4 (0.005 to 0.5 M) on Pt(111) and Graphene/Pt(111) under ambient temperatures pressures. Graphene was grown chemical vapor deposition (CVD) hydrocarbons [1]. Cyclic voltammograms (CV) HER currents were quantitatively benchmarked literature ensure reproducibility comparability kinetic measurements...