Oxygen Reduction Reaction

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Oxygen Reduction Reaction

Fuel cells are promising candidates for clean energy conversion in the quest for alternatives to conventional fossil fuel technology. The high amount of noble material, the overpotential required for the Oxygen Reduction Reaction (ORR) and the degradation of the electrocatalysts are the main issues that impair practical application. For electrocatalysis, the development of active and stable low-cost catalysts to be used as cathodes in Polymer Electrolyte Membrane Fuel Cells (PEMFCs) is a massive challenge.
The study of the ORR in the Electrocatalysis Group at the MPIE is conducted in a concerted way, by combining...

<div style="text-align: justify;">The oxygen reduction reaction (ORR) is a fundamental reaction related to various disciplines such as energy conversion, material dissolution or biology. Recently, particular interest focused on its essential role in fuel cells or lithium-air batteries. However, the mechanism of the ORR on metal surfaces remains unclear.</div>

Understanding the Mechanism of the Oxygen Reduction Reaction on Pt

The oxygen reduction reaction (ORR) is a fundamental reaction related to various disciplines such as energy conversion, material dissolution or biology. Recently, particular interest focused on its essential role in fuel cells or lithium-air batteries. However, the mechanism of the ORR on metal surfaces remains unclear.
[more]
<div style="text-align: justify;">Platinum-based electrocatalysts are still the state-of-the-art cathodes for the ORR. During the last decades, extensive investigations were performed on platinum single-crystals, in order to provide more insight into the mechanism of the ORR and the origin of the overpotential. It is well established that the activity for the ORR is ...</div>

Fundamental studies on the ORR on model surfaces and High Surface Area Catalysts (HSACs)

Platinum-based electrocatalysts are still the state-of-the-art cathodes for the ORR. During the last decades, extensive investigations were performed on platinum single-crystals, in order to provide more insight into the mechanism of the ORR and the origin of the overpotential. It is well established that the activity for the ORR is ...
[more]
<div style="text-align: justify;">Fuel cell catalyst that are made out of copper and platinum are being studied. We are preforming activity and degradation measurements with RDE, IL-TEM and ICP-MS.</div>

PtCu/C-Catalysts

Fuel cell catalyst that are made out of copper and platinum are being studied. We are preforming activity and degradation measurements with RDE, IL-TEM and ICP-MS.
[more]
<div style="text-align: justify;">Most studies on improving the stability and activity of fuel cell catalysts till now have focused on the characteristics of platinum and platinum alloy nanoparticles as electrode materials. However the support interactions between these nanoparticles and the commonly used carbon support, remain less known and understood.</div>

Role of Support for Activity and Stability of Fuel Cell Catalysts

Most studies on improving the stability and activity of fuel cell catalysts till now have focused on the characteristics of platinum and platinum alloy nanoparticles as electrode materials. However the support interactions between these nanoparticles and the commonly used carbon support, remain less known and understood.
[more]
<div style="text-align: justify;">For fast characterisation of different Pt -based catalysts for use in Polymer Electrolyte Membrane Fuel Cells (PEMFC) the Scanning Flow Cell System (SFC) is used.</div>

Fast Screening of PEMFC-Catalysts with the Scanning Flow Cell

For fast characterisation of different Pt -based catalysts for use in Polymer Electrolyte Membrane Fuel Cells (PEMFC) the Scanning Flow Cell System (SFC) is used.
[more]
 
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