Search Results - "Varela, Ana Sofía"

Editorial: Electrochemistry in Latin America by Vargas‐Barbosa, Nella M., Varela, Ana‐Sofía, Martínez‐Huitle, Carlos A., Scharifker, Benjamín

“…Contributing to the field: With this Special Collection, the aim is to transcend the barriers of geography and highlight the recent work of Latin American…”
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Electrochemical CO2 Reduction: A Classification Problem by Bagger, Alexander, Ju, Wen, Varela, Ana Sofia, Strasser, Peter, Rossmeisl, Jan

“…In this work, we propose four non‐coupled binding energies of intermediates as descriptors, or “genes”, for predicting the product distribution in CO2…”
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Molecular Nitrogen–Carbon Catalysts, Solid Metal Organic Framework Catalysts, and Solid Metal/Nitrogen‐Doped Carbon (MNC) Catalysts for the Electrochemical CO2 Reduction by Varela, Ana Sofia, Ju, Wen, Strasser, Peter

“…The CO2 electrochemical reduction reaction (CO2RR) is a promising technology for converting CO2 into chemicals and fuels, using surplus electricity from…”
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Electrochemical Reduction of CO2 on Metal-Nitrogen-Doped Carbon Catalysts by Varela, Ana Sofia, Ju, Wen, Bagger, Alexander, Franco, Patricio, Rossmeisl, Jan, Strasser, Peter

“…The electrochemical CO2 reduction reaction (CO2RR) is a promising technology for converting waste CO2 into chemicals which could be used as feedstock for the…”
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Understanding activity and selectivity of metal-nitrogen-doped carbon catalysts for electrochemical reduction of CO2 by Ju, Wen, Bagger, Alexander, Hao, Guang-Ping, Varela, Ana Sofia, Sinev, Ilya, Bon, Volodymyr, Roldan Cuenya, Beatriz, Kaskel, Stefan, Rossmeisl, Jan, Strasser, Peter

“…Direct electrochemical reduction of CO 2 to fuels and chemicals using renewable electricity has attracted significant attention partly due to the fundamental…”
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Solid State Reactions: Preparation of Solid Solutions and Pure Alkaline-Earth Titanates to Study their Dependence on Vegard’s Law by Varela, Ana Sofía, García-Márquez, Alfonso

“…This laboratory experiment consists of the synthesis of two series of alkaline-earth titanates (calcium–strontium and strontium–barium) to corroborate Vegard′s…”
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Unraveling Mechanistic Reaction Pathways of the Electrochemical CO2 Reduction on Fe–N–C Single-Site Catalysts by Ju, Wen, Bagger, Alexander, Wang, Xingli, Tsai, Yulin, Luo, Fang, Möller, Tim, Wang, Huan, Rossmeisl, Jan, Varela, Ana Sofia, Strasser, Peter

“…We report a joint experimental–computational mechanistic study of electrochemical reduction of CO2 to CH4, catalyzed by solid-state Fe–N–C catalysts, which…”
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Quantification of liquid products from the electroreduction of CO2 and CO using static headspace-gas chromatography and nuclear magnetic resonance spectroscopy by Bertheussen, Erlend, Abghoui, Younes, Jovanov, Zarko P., Varela, Ana-Sofia, Stephens, Ifan E.L., Chorkendorff, Ib

“…[Display omitted] •Static headspace-gas chromatography (HS-GC) useful for ex-situ liquid product analysis.•Could complement high-performance liquid…”
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Electrochemical CO2 Reduction: Classifying Cu Facets by Bagger, Alexander, Ju, Wen, Varela, Ana Sofia, Strasser, Peter, Rossmeisl, Jan

“…For CO2 reduction reactions, the Cu catalyst is unique, as compared with other metals, because of its ability to produce a wide range of hydrocarbon and…”
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The importance of pH in controlling the selectivity of the electrochemical CO2 reduction by Varela, Ana Sofia

“…The CO2 electrochemical reduction reaction (CO2RR) is seen as a promising technology for converting waste CO2 into carbon-based chemicals using renewable…”
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Controlling the selectivity of CO2 electroreduction on copper: The effect of the electrolyte concentration and the importance of the local pH by Varela, Ana Sofia, Kroschel, Matthias, Reier, Tobias, Strasser, Peter

“…•The buffer capacity of the electrolyte determines the activity and selectivity of Cu.•Our observations are attributed to a different local pH in different…”
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Tuning the Catalytic Activity and Selectivity of Cu for CO2 Electroreduction in the Presence of Halides by Varela, Ana Sofia, Ju, Wen, Reier, Tobias, Strasser, Peter

“…In the present study we demonstrate that the activity and selectivity of copper during CO2 electrochemical reduction can be tuned by simply adding halides to…”
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Highly selective plasma-activated copper catalysts for carbon dioxide reduction to ethylene by Mistry, Hemma, Varela, Ana Sofia, Bonifacio, Cecile S., Zegkinoglou, Ioannis, Sinev, Ilya, Choi, Yong-Wook, Kisslinger, Kim, Stach, Eric A., Yang, Judith C., Strasser, Peter, Cuenya, Beatriz Roldan

“…There is an urgent need to develop technologies that use renewable energy to convert waste products such as carbon dioxide into hydrocarbon fuels. Carbon…”
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Metal-Doped Nitrogenated Carbon as an Efficient Catalyst for Direct CO2 Electroreduction to CO and Hydrocarbons by Varela, Ana Sofia, Ranjbar Sahraie, Nastaran, Steinberg, Julian, Ju, Wen, Oh, Hyung-Suk, Strasser, Peter

“…This study explores the kinetics, mechanism, and active sites of the CO2 electroreduction reaction (CO2RR) to syngas and hydrocarbons on a class of…”
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Catalyst Particle Density Controls Hydrocarbon Product Selectivity in CO2 Electroreduction on CuOx by Wang, Xingli, Varela, Ana Sofia, Bergmann, Arno, Kühl, Stefanie, Strasser, Peter

“…A key challenge of the carbon dioxide electroreduction (CO2RR) on Cu‐based nanoparticles is its low faradic selectivity toward higher‐value products such as…”
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The chemical identity, state and structure of catalytically active centers during the electrochemical CO2 reduction on porous Fe–nitrogen–carbon (Fe–N–C) materials by Leonard, Nathaniel, Ju, Wen, Sinev, Ilya, Steinberg, Julian, Luo, Fang, Varela, Ana Sofia, Beatriz Roldan Cuenya, Strasser, Peter

“…We report novel structure–activity relationships and explore the chemical state and structure of catalytically active sites under operando conditions during…”
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Tuning Catalytic Selectivity at the Mesoscale via Interparticle Interactions by Mistry, Hemma, Behafarid, Farzad, Reske, Rulle, Varela, Ana Sofia, Strasser, Peter, Roldan Cuenya, Beatriz

“…The selectivity of heterogeneously catalyzed chemical reactions is well-known to be dependent on nanoscale determinants, such as surface atomic geometry and…”
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The benefits of cycling by Varela, Ana Sofía

“…The viability of electrocatalytic CO 2 reduction as a pathway for CO 2 utilization is contingent on developing selective processes towards high-value…”
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pH Effects on the Selectivity of the Electrocatalytic CO2 Reduction on Graphene-Embedded Fe–N–C Motifs: Bridging Concepts between Molecular Homogeneous and Solid-State Heterogeneous Catalysis by Varela, Ana Sofia, Kroschel, Matthias, Leonard, Nathaniel D, Ju, Wen, Steinberg, Julian, Bagger, Alexander, Rossmeisl, Jan, Strasser, Peter

“…The electrochemical CO2 reduction reaction (CO2RR) is a promising route for converting CO2 and excess renewable energy into valuable chemicals and synthetic…”
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Degradation and mineralization of oxytetracycline in pure and tap water under visible light irradiation using bismuth oxyiodides and the effect of depositing Au nanoparticles by Durán-Álvarez, Juan C., Martínez-Avelar, Carolina, González-Cervantes, Eduardo, Gutiérrez-Márquez, Ricardo A., Rodríguez-Varela, Mario, Varela, Ana Sofía, Castillón, Felipe, Zanella, Rodolfo

“…[Display omitted] •Bismuth oxyiodide materials were synthesized varying the iodine loading.•Metallic Au nanoparticles were deposited on the surface of the…”
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