Search Results - "Stephens, L E"

Probing the Active Surface Sites for CO Reduction on Oxide-Derived Copper Electrocatalysts by Verdaguer-Casadevall, Arnau, Li, Christina W, Johansson, Tobias P, Scott, Soren B, McKeown, Joseph T, Kumar, Mukul, Stephens, Ifan E. L, Kanan, Matthew W, Chorkendorff, Ib

“…CO electroreduction activity on oxide-derived Cu (OD-Cu) was found to correlate with metastable surface features that bind CO strongly. OD-Cu electrodes…”
Get full text

Trends in the Electrochemical Synthesis of H2O2: Enhancing Activity and Selectivity by Electrocatalytic Site Engineering by Verdaguer-Casadevall, Arnau, Deiana, Davide, Karamad, Mohammadreza, Siahrostami, Samira, Malacrida, Paolo, Hansen, Thomas W, Rossmeisl, Jan, Chorkendorff, Ib, Stephens, Ifan E. L

“…The direct electrochemical synthesis of hydrogen peroxide is a promising alternative to currently used batch synthesis methods. Its industrial viability is…”
Get full text

Spectroelectrochemical study of water oxidation on nickel and iron oxyhydroxide electrocatalysts by Francàs, Laia, Corby, Sacha, Selim, Shababa, Lee, Dongho, Mesa, Camilo A., Godin, Robert, Pastor, Ernest, Stephens, Ifan E. L., Choi, Kyoung-Shin, Durrant, James R.

“…Ni/Fe oxyhydroxides are the best performing Earth-abundant electrocatalysts for water oxidation. However, the origin of their remarkable performance is not…”
Get full text

Enabling direct H2O2 production through rational electrocatalyst design by Siahrostami, Samira, Verdaguer-Casadevall, Arnau, Karamad, Mohammadreza, Deiana, Davide, Malacrida, Paolo, Wickman, Björn, Escudero-Escribano, María, Paoli, Elisa A., Frydendal, Rasmus, Hansen, Thomas W., Chorkendorff, Ib, Stephens, Ifan E. L., Rossmeisl, Jan

“…Future generations require more efficient and localized processes for energy conversion and chemical synthesis. The continuous on-site production of hydrogen…”
Get full text

Spectroelectrochemical Analysis of the Water Oxidation Mechanism on Doped Nickel Oxides by Rao, Reshma R, Corby, Sacha, Bucci, Alberto, García-Tecedor, Miguel, Mesa, Camilo A, Rossmeisl, Jan, Giménez, Sixto, Lloret-Fillol, Julio, Stephens, Ifan E. L, Durrant, James R

“…Metal oxides and oxyhydroxides exhibit state-of-the-art activity for the oxygen evolution reaction (OER); however, their reaction mechanism, particularly the…”
Get full text

Alloys of platinum and early transition metals as oxygen reduction electrocatalysts by Nørskov, J. K, Greeley, J, Stephens, I. E. L, Bondarenko, A. S, Johansson, T. P, Hansen, H. A, Jaramillo, T. F, Rossmeisl, J, Chorkendorff, I

“…The widespread use of low-temperature polymer electrolyte membrane fuel cells for mobile applications will require significant reductions in the amount of…”
Get full text

The Effect of Size on the Oxygen Electroreduction Activity of Mass-Selected Platinum Nanoparticles by Perez-Alonso, Francisco J., McCarthy, David N., Nierhoff, Anders, Hernandez-Fernandez, Patricia, Strebel, Christian, Stephens, Ifan E. L., Nielsen, Jane H., Chorkendorff, Ib

“…A matter of size: The particle size effect on the activity of the oxygen reduction reaction of size‐selected platinum clusters was studied. The ORR activity…”
Get full text

Pt5Gd as a Highly Active and Stable Catalyst for Oxygen Electroreduction by Escudero-Escribano, María, Verdaguer-Casadevall, Arnau, Malacrida, Paolo, Grønbjerg, Ulrik, Knudsen, Brian P, Jepsen, Anders K, Rossmeisl, Jan, Stephens, Ifan E. L, Chorkendorff, Ib

“…The activity and stability of Pt5Gd for the oxygen reduction reaction (ORR) have been studied, using a combination of electrochemical measurements,…”
Get full text

Tuning the Activity of Pt(111) for Oxygen Electroreduction by Subsurface Alloying by Stephens, Ifan E. L, Bondarenko, Alexander S, Perez-Alonso, Francisco J, Calle-Vallejo, Federico, Bech, Lone, Johansson, Tobias P, Jepsen, Anders K, Frydendal, Rasmus, Knudsen, Brian P, Rossmeisl, Jan, Chorkendorff, Ib

“…To enable the development of low temperature fuel cells, significant improvements are required to the efficiency of the Pt electrocatalysts at the cathode,…”
Get full text

Resolving optimal ionomer interaction in fuel cell electrodes via operando X-ray absorption spectroscopy by Wang, Mengnan, Zhang, Jiaguang, Favero, Silvia, Higgins, Luke J. R., Luo, Hui, Stephens, Ifan E. L., Titirici, Maria-Magdalena

“…To bridge the gap between oxygen reduction electrocatalysts development and their implementation in real proton exchange membrane fuel cell electrodes, an…”
Get full text

Is lithium the key for nitrogen electroreduction? by Westhead, Olivia, Jervis, Rhodri, Stephens, Ifan E. L.

“…Why lithium appears critical for electrochemical ammonia synthesis remains elusive The Haber-Bosch process converts nitrogen (N 2 ) and hydrogen (H 2 ) into…”
Get full text

Progress and Perspectives in Photo‐ and Electrochemical‐Oxidation of Biomass for Sustainable Chemicals and Hydrogen Production by Luo, Hui, Barrio, Jesús, Sunny, Nixon, Li, Alain, Steier, Ludmilla, Shah, Nilay, Stephens, Ifan E. L., Titirici, Maria‐Magdalena

“…Biomass is recognized as an ideal CO2 neutral, abundant, and renewable resource substitute to fossil fuels. The rich proton content in most biomass derived…”
Get full text

Toward the Decentralized Electrochemical Production of H2O2: A Focus on the Catalysis by Yang, Sungeun, Verdaguer-Casadevall, Arnau, Arnarson, Logi, Silvioli, Luca, Čolić, Viktor, Frydendal, Rasmus, Rossmeisl, Jan, Chorkendorff, Ib, Stephens, Ifan E. L

“…H2O2 is a valuable, environmentally friendly oxidizing agent with a wide range of uses from the provision of clean water to the synthesis of valuable…”
Get full text

Design of an Active Site towards Optimal Electrocatalysis: Overlayers, Surface Alloys and Near-Surface Alloys of Cu/Pt(111) by Bandarenka, Aliaksandr S., Varela, Ana Sofia, Karamad, Mohammedreza, Calle-Vallejo, Federico, Bech, Lone, Perez-Alonso, Francisco J., Rossmeisl, Jan, Stephens, Ifan E. L., Chorkendorff, Ib

“…I could never be without Cu: An active site has been designed for the catalysis of CO electroxidation. This was achieved by incorporating submonolayer amounts…”
Get full text

Tuning the activity of Pt alloy electrocatalysts by means of the lanthanide contraction by Escudero-Escribano, María, Malacrida, Paolo, Hansen, Martin H., Vej-Hansen, Ulrik G., Velázquez-Palenzuela, Amado, Tripkovic, Vladimir, Schiøtz, Jakob, Rossmeisl, Jan, Stephens, Ifan E. L., Chorkendorff, Ib

“…The high platinum loadings required to compensate for the slow kinetics of the oxygen reduction reaction (ORR) impede the widespread uptake of low-temperature…”
Get full text

Toward an Active and Stable Catalyst for Oxygen Evolution in Acidic Media: Ti-Stabilized MnO2 by Frydendal, Rasmus, Paoli, Elisa A., Chorkendorff, Ib, Rossmeisl, Jan, Stephens, Ifan E. L.

“…Catalysts are required for the oxygen evolution reaction, which are abundant, active, and stable in acid. MnO2 is a promising candidate material for this…”
Get full text

Progress and Perspectives of Electrochemical CO2 Reduction on Copper in Aqueous Electrolyte by Nitopi, Stephanie, Bertheussen, Erlend, Scott, Soren B, Liu, Xinyan, Engstfeld, Albert K, Horch, Sebastian, Seger, Brian, Stephens, Ifan E. L, Chan, Karen, Hahn, Christopher, Nørskov, Jens K, Jaramillo, Thomas F, Chorkendorff, Ib

“…To date, copper is the only heterogeneous catalyst that has shown a propensity to produce valuable hydrocarbons and alcohols, such as ethylene and ethanol,…”
Get full text

Publisher Correction: Spectroelectrochemical study of water oxidation on nickel and iron oxyhydroxide electrocatalysts by Francàs, Laia, Corby, Sacha, Selim, Shababa, Lee, Dongho, Mesa, Camilo A., Godin, Robert, Pastor, Ernest, Stephens, Ifan E. L., Choi, Kyoung-Shin, Durrant, James R.

“…An amendment to this paper has been published and can be accessed via a link at the top of the paper…”
Get full text

Minimizing the Use of Platinum in Hydrogen-Evolving Electrodes by Stephens, Ifan E.L, Chorkendorff, Ib

“…One layer is enough: A new catalyst comprising a platinum monolayer on tungsten monocarbide (WC) could lead to inexpensive and efficient (photo)electrochemical…”
Get full text

Elucidation of the Oxygen Reduction Volcano in Alkaline Media using a Copper–Platinum(111) Alloy by Jensen, Kim D., Tymoczko, Jakub, Rossmeisl, Jan, Bandarenka, Aliaksandr S., Chorkendorff, Ib, Escudero‐Escribano, María, Stephens, Ifan E. L.

“…The relationship between the binding of the reaction intermediates and oxygen reduction activity in alkaline media was experimentally explored. By introducing…”
Get full text