MOF Derived Catalysts for Oxygen Reduction Reaction in Proton Exchange Membrane Fuel Cell
| Autor: | Saher Saim, Xuan Shi, Muhammad Noman, Asad Ali, Noaman Khan, Mujahid Wasim Durani |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Mechanical Engineering Proton exchange membrane fuel cell 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Redox 0104 chemical sciences Catalysis Chemical engineering Mechanics of Materials Oxygen reduction reaction General Materials Science Metal-organic framework 0210 nano-technology |
| Zdroj: | Key Engineering Materials. 778:275-282 |
| ISSN: | 1662-9795 |
| DOI: | 10.4028/www.scientific.net/kem.778.275 |
| Popis: | Highly porous ZIF-67 (Zeolitic imidazole framework) has a conductive crystalline metal organic framework (MOF) structure which was served as a precursor and template for the preparation of nitrogen-doped carbon nanotubes (NCNTs) electrocatalysts. As a first step, the chloroplatinic acid, a platinum (Pt) precursor was infiltrated in ZIF-67 with a precise amount to obtain 0.12 mg.cm-2 Pt loading. Later, the infiltrated structure was calcined at 700°C in Ar:H2 (90:10 vol%) gas mixture. Multi-walled nitrogen-doped carbon nanotubes were grown on the surface of ZIF-67 crystals following thermal activation at 700°C. The resulting PtCo-NCNTs electrocatalysts were deposited on Nafion-212 solid electrolyte membrane by spray technique to study the oxygen reduction reaction (ORR) in the presence of H2/O2 gases in a temperature range of 50-70°C. The present study elucidates the performance of nitrogen-doped carbon nanotubes ORR electrocatalysts derived from ZIF-67 and the effects of membrane electrode assembly (MEA) steaming on the performance of proton exchange membrane fuel cell (PEMFC) employing PtCo-NCNTs as ORR electrocatalysts. We observed that the peak power density at 70°C was 450 mW/cm2 for steamed membrane electrode assembly (MEA) compared to 392 mW/cm2 for an identical MEA without steaming. |
| Databáze: | OpenAIRE |
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