Synthesis of Ti4O7 Nanoparticles by Carbothermal Reduction Using Microwave Rapid HeatingReportar como inadecuado


Synthesis of Ti4O7 Nanoparticles by Carbothermal Reduction Using Microwave Rapid Heating


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Department of Engineering, Tohoku University, 6-6-07, Aoba Aramaki, Sendai 980-8579, Miyagi, Japan





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Abstract The polymer electrolyte fuel cell PEFC is an attractive power generation method from the perspective of environmental protection. Carbon is usually used as a catalyst support in PEFC, but it is oxidized under high electrical potential conditions. Ti4O7 is expected as a new catalyst support because of its high electrical conductivity and chemical resistivity. Though Ti4O7 as a catalyst support must have a high specific surface area for a high performance, it is difficult to synthesize nanostructured Ti4O7. In this research, Ti4O7 nanoparticles with a size of about 60 nm were synthesized by carbothermal reduction of TiO2 nanoparticles with polyvinylpyrrolidone carbon source using 2.45 GHz microwave irradiation. The experiment condition was at 950 °C for 30 min and the samples synthesized by conventional heating showed a grain growth. The findings of this study suggest that microwave processing can drastically reduce the total processing time for the synthesis of nanostructured Ti4O7. View Full-Text

Keywords: Ti4O7; nanoparticles; catalyst support; polymer electrolyte fuel cell; microwave heating; carbothermal reduction Ti4O7; nanoparticles; catalyst support; polymer electrolyte fuel cell; microwave heating; carbothermal reduction





Autor: Tomohiro Takeuchi, Jun Fukushima * , Yamato Hayashi and Hirotsugu Takizawa

Fuente: http://mdpi.com/



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