A5074349896- CO2 Reduction Techniques and Catalysts
- Advanced battery technologies research
- Electrocatalysts for Energy Conversion
- Ionic liquids properties and applications
- Carbon dioxide utilization in catalysis
- Carbon Dioxide Capture Technologies
- Carbohydrate Chemistry and Synthesis
- Cytokine Signaling Pathways and Interactions
- Fuel Cells and Related Materials
- Ovarian cancer diagnosis and treatment
- Electrochemical Analysis and Applications
- Chemical Synthesis and Analysis
- Ammonia Synthesis and Nitrogen Reduction
- Cancer Mechanisms and Therapy
- Green IT and Sustainability
- Glycosylation and Glycoproteins Research
- Molecular Junctions and Nanostructures
- Membrane Separation and Gas Transport
- PI3K/AKT/mTOR signaling in cancer
- Body Contouring and Surgery
- Electrical Fault Detection and Protection
- Marine and Offshore Engineering Studies
- Microbial Fuel Cells and Bioremediation
- Advancements in Solid Oxide Fuel Cells
- Catalysts for Methane Reforming
University of Toronto
2015-2024
Digital Research Alliance of Canada
2023-2024
Research and Studies Telecommunications Centre
2023
Emory University
2023
University of New Brunswick
2023
ORCID
2020
Toronto Public Health
2018-2019
Ollscoil na Gaillimhe – University of Galway
2012
University College Dublin
2005-2009
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,...
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...
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...
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 oxygen evolution reaction (OER) limits the energy efficiency of electrocatalytic systems due to high overpotential symptomatic poor kinetics; this problem worsens over time if performance OER electrocatalyst diminishes during operation. Here, a novel synthesis nanocrystalline Ni–Co–Se using ball milling at cryogenic temperature is reported. It discovered that, by anodizing structure OER, Se ions leach out original structure, allowing water molecules hydrate Ni and Co defective...
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...
Renewable CH4 produced from electrocatalytic CO2 reduction is viewed as a sustainable and versatile energy carrier, compatible with existing infrastructure. However, conventional alkaline neutral CO2-to-CH4 systems suffer loss to carbonates, recovering the lost requires input exceeding heating value of CH4. Here we pursue CH4-selective electrocatalysis in acidic conditions via coordination method, stabilizing free Cu ions by bonding multidentate donor sites. We find that hexadentate sites...
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...