Decomposition of hydrazine allows the attitude and altitude control of satellite. Macroporous-mesoporous alumina supported iridium catalyst (KCMC-7) has been developed using the fast dehydration of aluminium trihydroxide and subsequent multiple impregnations. The result of data analysis suggested that the obtained alumina was rho-Al2O3 with both macro and mesopores. Significant amount of pentagonal Al sites after rehydration of rho-Al2O3 was responsible for ultra high dispersion for ultra high loading of metal around 30 wt%. The performance of the KCMC-7 measured using 4.5 N dual thruster module was satisfactory until the end of life, providing enough thrust for the attitude and altitude control of satellite in the pressure range of 50-350 psi. (C) 2011 Elsevier B. V. All rights reserved.