Enhanced performance of non-PGM catalysts in air operated PEM-fuel cells
| Autor: | Tao Xu, Heather M. Barkholtz, Lina Chong, Di-Jia Liu, Zachary B. Kaiser |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Renewable Energy
Sustainability and the Environment Chemistry Catalyst support Inorganic chemistry Energy Engineering and Power Technology Proton exchange membrane fuel cell 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Direct-ethanol fuel cell 01 natural sciences Cathode 0104 chemical sciences Catalysis law.invention Fuel Technology law Specific surface area 0210 nano-technology Triple phase boundary Zeolitic imidazolate framework |
| Zdroj: | International Journal of Hydrogen Energy. 41:22598-22604 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2016.08.193 |
| Popis: | A non-platinum group metal (non-PGM) oxygen reduction catalyst was prepared from “support-free” zeolitic imidazolate framework (ZIF) precursor and tested in the proton exchange membrane fuel cell with air as the cathode feed. The iron nitrogen and carbon composite (Fe–N–C) based catalyst has high specific surface area decorated uniformly with active sites, which redefines the triple phase boundary (TPB) and requires re-optimization of the cathodic membrane electrode fabrication to ensure efficient mass and charge transports to the catalyst surface. This study reports an effort in optimizing catalytic ink formulation for the membrane electrode preparation and its impact to the fuel cell performance under air. Through optimization, the fuel cell areal current density as high as 115.2 mA/cm2 at 0.8 V or 147.6 mA/cm2 at 0.8 ViR-free has been achieved under one bar air. Impacts on fuel cell internal impedance and the water formation are also investigated. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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