| Autor: |
Reza Alipour Moghadam Esfahani, Keenan Black-Araujo, Peter D. Melino, Mason T. Sullivan, E. Bradley Easton |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
Results in Engineering, Vol 16, Iss , Pp 100767- (2022) |
| Druh dokumentu: |
article |
| ISSN: |
2590-1230 |
| DOI: |
10.1016/j.rineng.2022.100767 |
| Popis: |
A novel carbon-free silicon-doped niobium suboxide was synthesized and tested as an electrocatalyst support for fuel cell applications. The promising Nb0·24O0·46Si0.30 (NbOS) metal oxide support exhibits a low structural band-gap with significantly high electronic conductivity. Furthmore, the NbOS support shows high corrosion-resistance in acidic media at high potentials. Pt nanoparticles were dispersed over the NbOS support (Pt/NbOS) to create an electrocatalyst with excellent electroactivity towards the oxygen reduction reaction (ORR). Likewise, in situ electrochemical analysis, and impedance spectroscopy (EIS) confirmed remarkable durability of the Pt/NbOS catalyst when subjected to harsh accelerated stress testing (AST) condtions. The enhanced stability and electrocatalytic activity and of Pt/NbOS is attributed to the strong metal-support interaction (SMSI) between the Pt nanoparticles (NPs) and the conductive NbOS support, which were confirmed via XRD and XPS measurements. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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