Pt�?�Ru decorated self-assembled TiO2�?�carbon hybrid nanostructure for enhanced methanol electrooxidation

Bulletin of materials science

A K Shukla¹  S Pitchumani²  K G Nishanth²  P Sridhar² 

[1] Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560 012, India$$Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560 012, IndiaSolid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560 012, India$$;CSIR-Central Electrochemical Research Institute - Madras Unit, CSIR Madras Complex, Chennai 600 113, India$$CSIR-Central Electrochemical Research Institute - Madras Unit, CSIR Madras Complex, Chennai 600 113, IndiaCSIR-Central Electrochemical Research Institute - Madras Unit, CSIR Madras Complex, Chennai 600 113, India$$

关键词: DMFC;    anode catalyst;    methanol oxidation;    Ptâ€�?�Ru;    accelerated durability test.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Porous titanium oxideâ€�?�carbon hybrid nanostructure (TiO₂â€�?�C) with a specific surface area of 350 m²/g and an average pore-radius of 21.8 Ã�? is synthesized via supramolecular self-assembly with an in situ crystallization process. Subsequently, TiO₂â€�?�C supported Ptâ€�?�Ru electro-catalyst (Ptâ€�?�Ru/TiO₂â€�?�C) is obtained and investigated as an anode catalyst for direct methanol fuel cells (DMFCs). X-ray diffraction, Raman spectroscopy and transmission electron microscopy (TEM) have been employed to evaluate the crystalline nature and the structural properties of TiO₂â€�?�C. TEM images reveal uniform distribution of Ptâ€�?�Ru nanoparticles (ð‘�??_Pt−Ru = 1.5â€�??3.5 nm) on TiO₂â€�?�C. Methanol oxidation and accelerated durability studies on Ptâ€�?�Ru/TiO₂â€�?�C exhibit enhanced catalytic activity and durability compared to carbon-supported Ptâ€�?�Ru. DMFC employing Ptâ€�?�Ru/TiO₂â€�?�C as an anode catalyst delivers a peak-power density of 91 mW/cm² at 65 °C as compared to the peak-power density of 60 mW/cm² obtained for the DMFC with carbon-supported Ptâ€�?�Ru anode catalyst operating under similar conditions.

【 授权许可】

Unknown