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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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Stephens, Ifan Erfyl Lester
Imperial College London
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2018Scalable Synthesis of Carbon-Supported Platinum–Lanthanide and −Rare-Earth Alloys for Oxygen Reductioncitations
- 2017New Platinum Alloy Catalysts for Oxygen Electroreduction Based on Alkaline Earth Metalscitations
- 2016Exploring the Lanthanide Contraction to Tune the Activity and Stability of Pt
- 2015Synchrotron Based Structural Investigations of Mass-Selected PtxGd Nanoparticles and a Gd/Pt(111) Single Crystal for Electrochemical Oxygen Reduction
- 2015Controlling the Activity and Stability of Pt-Based Electrocatalysts By Means of the Lanthanide Contraction
- 2015What Is the Optimum Strain for Pt Alloys for Oxygen Electroreduction?
- 2014Oxygen Evolution on Model Well-Characterised Mass-Selected Nanoparticles of RuOx
- 2014Understanding the Oxygen Reduction Reaction on a Y/Pt(111) Single Crystal
- 2014Iron-Treated NiO as a Highly Transparent p-Type Protection Layer for Efficient Si-Based Photoanodescitations
- 2011Tuning the Activity of Pt(111) for Oxygen Electroreduction by Subsurface Alloyingcitations
Places of action
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article
Tuning the Activity of Pt(111) for Oxygen Electroreduction by Subsurface Alloying
Abstract
To enable the development of low temperature fuel cells, significant improvements are required to the efficiency of the Pt electrocatalysts at the cathode, where oxygen reduction takes place. Herein, we study the effect of subsurface solute metals on the reactivity of Pt, using a Cu/Pt(111) near-surface alloy. Our investigations incorporate electrochemical measurements, ultrahigh vacuum experiments, and density functional theory. Changes to the OH binding energy, ΔEOH, were monitored in situ and adjusted continuously through the subsurface Cu coverage. The incorporation of submonolayer quantities of Cu into Pt(111) resulted in an 8-fold improvement in oxygen reduction activity. The most optimal catalyst for oxygen reduction has an ΔEOH ≈ 0.1 eV weaker than that of pure Pt, validating earlier theoretical predictions.