| Investigating the oxygen evolution reaction of TiO2 nano tube synthesized chemically in acidic medium using electrochemical impedance spectroscopy |
| کد مقاله : 1036-CNF (R1) |
| نویسندگان |
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پردیس نادراصلی *1، محمد محمدی تقی آبادی2، محمد ژیانی3، هایده بلالی دهکردی4 1دانشگله صنعتی اصفهان 2گروه آموزشی شیمی فیزیک ، دانشکده علوم پایه ، دانشگاه تربیت مدرس ، تهران ، ایران 3گروه آموزشی شیمی فیزیک ، دانشکده شیمی ، دانشگاه صنعتی اصفهان ، اصفهان ، ایران 4دانشگاه صنعتی اصفهان |
| چکیده مقاله |
| In this research the effort is reducing platinum-group-metals (PGM) loading of the anodic catalyst, which are Ir and Ru oxides that show the highest activity toward OER in acidic media, using high surface area supported catalysts or multi-metal oxide catalysts. Titanium or tin oxide supports are possible alternatives to lower the noble metal catalyst loading without reduction of the catalyst performance. Ti-based materials are frequently considered as catalyst support and in this research, we used KOH for Hydrothermal treatment to synthesize a nano tube structural material. The hydrothermal synthesis covers the process of crystal growth, crystal transformation, phase equilibrium, and finally leads to fine to ultra-fine crystals. [1]–[4] Combining cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) techniques appears a promising strategy to find a fine Ti-based material catalyst support. The CV results show that the formation of TiO2 nano tube lower the integral of the CV curve which lead to lower double layer capacitance in comparison of TiO2 P25. But the EIS results show that nano tubes have lower charge transfer resistance which shows higher support conductivity and with increasing potential, resistance decreases. These results show good conductivity and can helps the catalyst activity. |
| کلیدواژه ها |
| OER, TiO2 nanotube, Catalyst support, Hydrothermal TNT. |
| وضعیت: چکیده برای ارائه به صورت پوستر پذیرفته شده است |