Iridium-decorated multiwall carbon nanotubes and its catalytic activity with Shell 405 in hydrazine decomposition

Prasad, V and Vasanthkumar, MS (2015) Iridium-decorated multiwall carbon nanotubes and its catalytic activity with Shell 405 in hydrazine decomposition. In: JOURNAL OF NANOPARTICLE RESEARCH, 17 (10).

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Abstract

Iridium-functionalized multiwalled carbon nanotubes (Ir-MWNT) are the future catalyst support material for hydrazine fuel decomposition. The present work demonstrates decoration of iridium particle on iron-encapsulated multiwalled carbon nanotubes (MWNT) by wet impregnation method in the absence of any stabilizer. Electron microscopy studies reveal the coated iridium particle size in the range of 5-10 nm. Elemental analysis by energy dispersive X-ray diffraction confirms 21 wt% of Ir coated over MWNT. X-ray photoelectron spectroscopy (XPS) shows 4f(5/2) and 4f(7/2) lines of iridium and confirms the metallic nature. The catalytic activity of Ir-MWNT/Shell 405 combination is performed in 1 N hydrazine micro-thrusters. The thruster performance shows increase in chamber pressure and decrease in chamber temperature when compared to Shell 405 alone. This enhanced performance is due to high thermal conducting nature of MWNTs and the presence of Ir active sites over MWNTs.

Item Type:	Journal Article
Publication:	JOURNAL OF NANOPARTICLE RESEARCH
Publisher:	SPRINGER
Additional Information:	Copy right for this article belongs to the SPRINGER, VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
Keywords:	Carbon nanotubes; Iridium; Wet impregnation; Hydrazine; Micro-thruster; CNT; Nanostructured catalysts
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	05 Nov 2015 06:52
Last Modified:	05 Nov 2015 06:52
URI:	http://eprints.iisc.ac.in/id/eprint/52678

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