A5081847229- CO2 Reduction Techniques and Catalysts
- Ionic liquids properties and applications
- Advanced battery technologies research
- Electrocatalysts for Energy Conversion
- Carbon Dioxide Capture Technologies
- Carbon dioxide utilization in catalysis
- Electrochemical Analysis and Applications
- Mental Health and Patient Involvement
- Chemical Looping and Thermochemical Processes
- Green IT and Sustainability
- Interprofessional Education and Collaboration
- Catalysis and Oxidation Reactions
- Molecular Junctions and Nanostructures
- Primary Care and Health Outcomes
- Telemedicine and Telehealth Implementation
- Ammonia Synthesis and Nitrogen Reduction
- Catalysts for Methane Reforming
- Innovations in Concrete and Construction Materials
- Advanced Chemical Sensor Technologies
- Microbial Fuel Cells and Bioremediation
- COVID-19 and Mental Health
- Aluminum Alloys Composites Properties
- Social Work Education and Practice
- Healthcare innovation and challenges
- Electronic and Structural Properties of Oxides
University of Toronto
2018-2024
Rogers (United States)
2021-2022
California State University, East Bay
2021-2022
Boston University
2021-2022
New York City Department of Health and Mental Hygiene
2021
VA Boston Healthcare System
2021
Yale University
2021
University of New Brunswick
2018-2020
Toronto Public Health
2018-2019
Carbon dioxide (CO2) electroreduction could provide a useful source of ethylene, but low conversion efficiency, production rates, and catalyst stability limit current systems. Here we report that copper electrocatalyst at an abrupt reaction interface in alkaline electrolyte reduces CO2 to ethylene with 70% faradaic efficiency potential -0.55 volts versus reversible hydrogen electrode (RHE). Hydroxide ions on or near the surface lower reduction carbon monoxide (CO)-CO coupling activation...
Electrolysis offers an attractive route to upgrade greenhouse gases such as carbon dioxide (CO2) valuable fuels and feedstocks; however, productivity is often limited by gas diffusion through a liquid electrolyte the surface of catalyst. Here, we present catalyst:ionomer bulk heterojunction (CIBH) architecture that decouples gas, ion, electron transport. The CIBH comprises metal superfine ionomer layer with hydrophobic hydrophilic functionalities extend ion transport from tens nanometers...
The electroreduction of CO<sub>2</sub> to CO is a promising strategy utilize emissions while generating high value product.
The electrochemical conversion of CO2 produces valuable chemicals and fuels. However, operating at high reaction rates locally alkaline conditions that convert reactant into cell-damaging carbonate salts. These salts precipitate in the porous cathode structure, block transport, reduce efficiency, render electrolysis inherently unstable. We propose a self-cleaning reduction strategy with short, periodic reductions applied voltage, which avoids saturation prevents salt formation. demonstrate...
The carbon dioxide reduction reaction (CO2RR) presents the opportunity to consume CO2 and produce desirable products. However, alkaline conditions required for productive CO2RR result in bulk of input being lost bicarbonate carbonate. This loss imposes a 25% limit on conversion multicarbon (C2+) products systems that use anions as charge carrier—and overcoming this is challenge singular importance field. Here, we find cation exchange membranes (CEMs) do not provide locally conditions,...
The electrochemical reduction of carbon monoxide is a promising approach for the renewable production carbon-based fuels and chemicals. Copper shows activity toward multi-carbon products from CO reduction, with reaction selectivity favoring two-carbon products; however, efficient conversion to higher such as n-propanol, liquid fuel, has yet be achieved. We hypothesize that copper adparticles, possessing high density under-coordinated atoms, could serve preferential sites n-propanol...
Abstract In alkaline and neutral MEA CO 2 electrolyzers, rapidly converts to (bi)carbonate, imposing a significant energy penalty arising from separating the anode gas outlets. Here we report electrolyzer uses bipolar membrane (BPM) convert (bi)carbonate back , preventing crossover; that surpasses single-pass utilization (SPU) limit (25% for multi-carbon products, C 2+ ) suffered by previous neutral-media electrolyzers. We employ stationary unbuffered catholyte layer between BPM cathode...
A hydrated ionomer catalyst support layer, capable of slowing oxygen transport, enables the generation multi-carbon products from pressurized, oxygen-containing, dilute carbon dioxide feedstocks.
Abstract The electrochemical conversion of CO 2 to methane provides a means store intermittent renewable electricity in the form carbon-neutral hydrocarbon fuel that benefits from an established global distribution network. stability and selectivity reported approaches reside below technoeconomic-related requirements. Membrane electrode assembly-based reactors offer known path stability; however, highly alkaline conditions on cathode favour C-C coupling multi-carbon products. In...
Alkali hydroxide systems capture CO2 as carbonate; however, generating a pure stream requires significant energy input, typically from thermal cycling to 900°C. What is more, the subsequent valorization of gas-phase into products presents additional requirements and system complexities, including managing formation (bi)carbonate in an electrolyte separating unreacted downstream. Here, we report direct electrochemical conversion CO2, captured form carbonate, multicarbon (C2+) products. Using...
Over a broad range of operating conditions, many CO2 electroreduction catalysts can maintain selectivity toward certain reduction products, leading to materials and surfaces being categorized according their products; here we ask, is product truly property the catalyst? Silver among best electrocatalysts for CO in aqueous electrolytes, where it reaches near-unity selectivity. We consider hydrogenations oxygen carbon atoms via two proton-coupled-electron-transfer processes as chief...
The electrochemical reduction of carbon dioxide (CO2RR) to chemical feedstocks, such as ethylene (C2H4), is an attractive means mitigate emissions and store intermittent renewable electricity. Much research has focused on improving CO2 electrolysis cell efficiency; less attention been paid the downstream purification outlet product streams. In this work, we model use mature separation technologies part overall production polymer-grade C2H4 from CO2. We find that removal most energy-intensive...
Carbon dioxide (CO2) electrolysis powered with renewable electricity can help close the carbon cycle by converting emissions into chemicals and fuels. Two key advancements are required to bridge technological gaps for industrial implementation: pilot plant demonstrations detailed performance data; chemical engineering process models built tested lab- pilot-scale data. Here, we develop a semi-empirical electrolyzer model in Aspen Custom Modeler which is trained on 5 cm2 lab-scale CO2...
Electrocatalytic CO2 reduction offers a means to produce value-added multi-carbon products and mitigate emissions. However, the stability of electrolyzers for C2+ has not exceeded 200 h—well below that CO- H2-producing electrolyzers—and most stable systems employ low-conductivity substrates incompatible with scale. Current gas diffusion electrodes (GDEs) become filled salt precipitate electrolyte, which limits availability at catalyst beyond 30 h. We develop GDE architecture is resistant...
Membrane electrode assembly (MEA) electrolyzers can perform stable, high-rate carbon dioxide (CO2) electroreduction for renewable fuels and chemicals, thereby realizing effective utilization to mitigate anthropogenic CO2 emissions. Here, we present a numerical, multiphysics model, computationally intensified 60-fold with machine learning analysis of computational experimental data, address the most urgent systems challenges in MEA electrolyzers: mitigating carbonate liquid product crossover...
In a direct carbonate electrolysis system, CO 2 diffusion layer enabled the production of CO-rich syngas.