A5034414320- CO2 Reduction Techniques and Catalysts
- Ionic liquids properties and applications
- Advanced Thermoelectric Materials and Devices
- Electrochemical Analysis and Applications
- Electrocatalysts for Energy Conversion
- Advanced battery technologies research
- Infrared Thermography in Medicine
- Circadian rhythm and melatonin
- Gas Sensing Nanomaterials and Sensors
- Photoreceptor and optogenetics research
- Molecular Junctions and Nanostructures
Boston College
2017-2020
Chestnut Hill College
2017
Electrocatalysis is central to the production of renewable fuels and high-value commodity chemicals. The electrolyte electrode together determine catalytic properties liquid/solid interface. In particular, cations can greatly change rates reaction selectivity many electrocatalytic processes. For this reason, careful choice cation an essential step in design interfaces with high for desired products. To make such a judicious choice, it critical understand where electric double layer reside...
The ability of copper to catalyze the electrochemical reduction CO2 has been shown greatly depend on its nanoscale surface morphology. While previous studies found evidence irreversible changes nanoparticle and thin film electrodes following electrolysis, we present here first observation reversible reconstruction electrocatalytic surfaces induced by adsorbed CO intermediate. Using attenuated total internal reflection infrared surface-enhanced Raman spectroscopies, formation metal clusters...
Surface-adsorbed CO is generally considered a reactive on-pathway intermediate in the aqueous electrochemical reduction of CO2 on Cu electrodes. Though can bind to variety adsorption sites (e.g., atop or bridge), spectroscopic studies Cu/electrolyte contact have mostly been concerned with atop-bound CO. Using surface-selective infrared (IR) spectroscopy, we investigated reactivities and coverages atop- bridge-bound polycrystalline electrode alkaline electrolytes. We show here that (1)...
Significance Many technologically interesting electrocatalytic reactions lead to a variety of products; that is, they exhibit poor product selectivity. Examples include the oxidations ammonia and methane reductions nitrogen carbon dioxide. The selectivity hinders adoption these promising technologies. Improving requires molecular-level understanding factors control reaction processes. Herein, we investigated how liquid environment impacts reduction CO ethylene, prototypical process for...
The catalytic selectivity and reactivity of an electrocatalytic interface can profoundly depend on the identity supporting electrolyte's cation. In case CO2 reduction copper electrodes, these cation effects have been utilized to suppress undesired hydrogen evolution promote formation C2 products. However, more effectively steer electrolyte/copper by cations, it is crucial reveal various physical mechanisms which cations impact properties this prototypical for reduction. Herein, we employ...
Metal electrodes with rough surfaces are often found to convert CO or CO2 hydrocarbons and oxygenates high selectivity at reaction rates in comparison their smooth counterparts. The atomic-level morphology of a electrode is likely one key factor responsible for its comparatively catalytic activity. However, few methods capable probing the structure metal under electrocatalytic conditions. As result, nuances surface that control characteristics these have remained largely unexplored. Because...
ADVERTISEMENT RETURN TO ISSUEPREVViewpointNEXTADDITION / CORRECTIONThis article has been corrected. View the notice.Surface-Adsorbed CO as an Infrared Probe of Electrocatalytic InterfacesCharuni M. GunathungeCharuni GunathungeDepartment Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United StatesMore by Charuni Gunathungehttp://orcid.org/0000-0003-1485-2469, Jingyi LiJingyi LiDepartment Lihttp://orcid.org/0000-0002-3580-7803, Xiang LiXiang...
Electrocatalytic Cu is key to the development of processes that can convert CO and CO2 hydrocarbons, nitrate ammonia. The hydrogen evolution reaction (HER) often competes with these processes. Few studies studied this on under alkaline conditions. Herein, we examined HER electrodes conditions in Na+- Cs+-containing electrolytes. We found 0.1 M solutions NaOH CsOH highest commercially available purity grades, trace impurities iron deposit electrode during electrolysis. As a result, rate...
ADVERTISEMENT RETURN TO ISSUEPREVCorrectionNEXTORIGINAL ARTICLEThis notice is a correctionCorrection to "Surface-Adsorbed CO as an Infrared Probe of Electrocatalytic Interfaces"Charuni M. GunathungeCharuni GunathungeMore by Charuni Gunathungehttp://orcid.org/0000-0003-1485-2469, Jingyi LiJingyi LiMore Lihttp://orcid.org/0000-0002-3580-7803, Xiang LiXiang Lihttp://orcid.org/0000-0001-9071-8494, and Matthias Waegele*Matthias WaegeleMore Waegelehttp://orcid.org/0000-0002-1186-7545Cite this: ACS...