| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Nørskov, Jens Kehlet
Technical University of Denmark
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (32/32 displayed)
- 2023Continuous-flow electrosynthesis of ammonia by nitrogen reduction and hydrogen oxidationcitations
- 2022Reversible Atomization and Nano-Clustering of Pt as a Strategy for Designing Ultra-Low-Metal-Loading Catalystscitations
- 2020Subsurface Nitrogen Dissociation Kinetics in Lithium Metal from Metadynamicscitations
- 2020Nitride or Oxynitride? Elucidating the Composition–Activity Relationships in Molybdenum Nitride Electrocatalysts for the Oxygen Reduction Reactioncitations
- 2019Electro-Oxidation of Methane on Platinum under Ambient Conditionscitations
- 2019An electronic structure descriptor for oxygen reactivity at metal and metal-oxide surfacescitations
- 2019Efficient Pourbaix diagrams of many-element compoundscitations
- 2017Machine-learning methods enable exhaustive searches for active Bimetallic facets and reveal active site motifs for CO2 reductioncitations
- 2017Rh-MnO Interface Sites Formed by Atomic Layer Deposition Promote Syngas Conversion to Higher Oxygenatescitations
- 2017Mechanistic insights into heterogeneous methane activationcitations
- 2016Automated Discovery and Construction of Surface Phase Diagrams Using Machine Learningcitations
- 2015Surface Tension Effects on the Reactivity of Metal Nanoparticlescitations
- 2014Hydrogen adsorption on bimetallic PdAu(111) surface alloyscitations
- 2014Discovery of a Ni-Ga catalyst for carbon dioxide reduction to methanolcitations
- 2014Nanoscale limitations in metal oxide electrocatalysts for oxygen evolutioncitations
- 2013First Principles Investigation of Zinc-anode Dissolution in Zinc-air Batteriescitations
- 2013Theoretical investigation of the activity of cobalt oxides for the electrochemical oxidation of watercitations
- 2013Direct observation of the oxygenated species during oxygen reduction on a platinum fuel cell cathodecitations
- 2013Density functional theory studies of transition metal nanoparticles in catalysis
- 2012CO hydrogenation to methanol on Cu–Ni catalystscitations
- 2012Universality in Oxygen Reduction Electrocatalysis on Metal Surfacescitations
- 2011Electrical conductivity in Li2O2 and its role in determining capacity limitations in non-aqueous Li-O2 batteriescitations
- 2011Trends in Metal Oxide Stability for Nanorods, Nanotubes, and Surfacescitations
- 2010Ammonia dynamics in magnesium ammine from DFT and neutron scatteringcitations
- 2010Ammonia dynamics in magnesium ammine from DFT and neutron scatteringcitations
- 2009Combinatorial Density Functional Theory-Based Screening of Surface Alloys for the Oxygen Reduction Reactioncitations
- 2009A CATALYST, A PROCESS FOR SELECTIVE HYDROGENATION OF ACETYLENE TO ETHYLENE AND A METHOD FOR THE MANUFACTURE OF THE CATALYST
- 2008Identification of non-precious metal alloy catalysts for selective hydrogenation of acetylenecitations
- 2007Discovery of technical methanation catalysts based on computational screeningcitations
- 2007Discovery of technical methanation catalysts based on computational screeningcitations
- 2007CO methanation over supported bimetallic Ni-Fe catalysts: From computational studies towards catalyst optimizationcitations
- 2003The stability of the hydroxylated (0001) surface of alpha-Al2O3citations
Places of action
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article
Nitride or Oxynitride? Elucidating the Composition–Activity Relationships in Molybdenum Nitride Electrocatalysts for the Oxygen Reduction Reaction
Abstract
Molybdenum nitride (Mo−N) catalysts have shown promising activity and stability for the oxygen reduction reaction (ORR) in acid. However, the effect of oxygen (O) incorporation (from synthesis, catalysis, or exposure to air) on their activity remains elusive. Here, we use reactive sputtering to synthesize three compositions of thin-film catalysts and use extensive materials characterization to investigate the depth-dependent structure and incorporated O. We show that the as-deposited Mo−N films are highly oxidized both at the surface (>30% O) and in the bulk (3− 21% O) and that the ORR performance is strongly correlated with the bulk structure and composition. Activity for 4e− ORR is highest for compositions with the highest N/O and N/Mo ratio. Furthermore, H2O2 production for the films with moderate O content is comparable to or higher than the most H2O2-selective nonprecious metal catalysts in acidic electrolyte, on a moles per mass or surface area of catalyst basis. Density functional theory provides insight into the energetics of O incorporation and vacancy formation, and we hypothesize that activity trends with O/N ratios can be traced to the varying crystallite phases and their interactions with ORR adsorbates. This work demonstrates the prevalence and significance of O in metal nitride electrocatalysts and motivates further investigation into the role of O in other nonprecious metal materials.