Highly stable precious metal-free cathode catalyst for fuel cell application
| Autor: | Geoffrey McCool, Sam McKinney, Michael J. Workman, Kateryna Artyushkova, Alexey Serov, Barr Halevi, Thomas Stephenson, Henry Romero, Plamen Atanassov |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Energy Engineering and Power Technology Nanotechnology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 7. Clean energy 01 natural sciences Durability 0104 chemical sciences Corrosion Catalysis Membrane Chemical engineering X-ray photoelectron spectroscopy Electrode Degradation (geology) Electrical and Electronic Engineering Physical and Theoretical Chemistry 0210 nano-technology Layer (electronics) |
| Zdroj: | Journal of Power Sources. 327:557-564 |
| ISSN: | 0378-7753 |
| Popis: | A platinum group metal-free (PGM-free) oxygen reduction reaction (ORR) catalyst engineered for stability has been synthesized using the sacrificial support method (SSM). This catalyst was comprehensively characterized by physiochemical analyses and tested for performance and durability in fuel cell membrane electrode assemblies (MEAs). This catalyst, belonging to the family of Fe-N-C materials, is easily scalable and can be manufactured in batches up to 200 g. The fuel cell durability tests were performed in a single cell configuration at realistic operating conditions of 0.65 V, 1.25 atmgauge air, and 90% RH for 100 h. In-depth characterization of surface chemistry and morphology of the catalyst layer before and after durability tests were performed. The failure modes of the PGM-free electrodes were derived from structure-to-property correlations. It is suggested that under constant voltage operation, the performance loss results from degradation of the electrode pore structure, while under carbon corrosion accelerated test protocols the failure mode is catalyst corrosion. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect