A highly durable N-enriched titanium nanotube suboxide fuel cell catalyst support
| Autor: | Holly M. Fruehwald, Jacquelyn G. Egan, Nadia O. Laschuk, Olena V. Zenkina, Mason Thomas Sullivan, Iraklii I. Ebralidze, E. Bradley Easton, Reza Alipour Moghadam Esfahani |
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| Rok vydání: | 2020 |
| Předmět: |
Suboxide
Nanotube Materials science Process Chemistry and Technology Catalyst support Oxide chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Catalysis 0104 chemical sciences chemistry.chemical_compound chemistry Chemical engineering Molybdenum Surface modification 0210 nano-technology General Environmental Science Titanium |
| Zdroj: | Applied Catalysis B: Environmental. 263:118272 |
| ISSN: | 0926-3373 |
| DOI: | 10.1016/j.apcatb.2019.118272 |
| Popis: | Reduced bandgap metal oxide materials are consider an alternative to carbon black supports for fuel cell catalysts. Here we report a unique N-enriched titanium nanotube suboxide doped with molybdenum (TNTS-Mo) fuel cell catalyst support. The support was prepared by the surface modification of a TNTS-Mo with a terpyridine (TPY) ligand, yielding TPY/TNTS-Mo. We have deposited Pt onto this support and evaluated its activity and stability. The Pt/TPY/TNTS-Mo catalyst was subjected to stringent accelerated stress tests (AST) designed to induce catalyst degradation similar to automotive operation and startup-shutdown conditions. The Pt/TPY/TNTS-Mo was compared with Pt/TNTS-Mo and a benchmark carbon supported Pt catalyst (Pt/C). These stability protocols confirmed that TPY modification greatly enhances the stability and durability of the Pt nanoparticles via strong metal support interaction (SMSI). In addition, the covalently attached TPY layer stabilizes the doped metal oxide supports itself, preventing changes in its surface state and composition at high potentials. |
| Databáze: | OpenAIRE |
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