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Citation: Shuang Liu, Nanfang Tang, Qinghao Shang, Chuntian Wu, Guoliang Xu, Yu Cong. Superior performance of iridium supported on rutile titania for the catalytic decomposition of N₂O propellants[J]. Chinese Journal of Catalysis, ;2018, 39(7): 1189-1193. doi: 10.1016/S1872-2067(18)63077-3 shu

Superior performance of iridium supported on rutile titania for the catalytic decomposition of N₂O propellants

Shuang Liu ^a,b, ,
Nanfang Tang ^a ,
Qinghao Shang ^a,c ,
Chuntian Wu ^a ,
Guoliang Xu ^a ,
Yu Cong ^a

a Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China;
b Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China;
c University of Chinese Academy of Sciences, Beijing 100049, China

Received Date: 12 March 2018
Revised Date: 9 April 2018

Fund Project: This work was supported by the National Natural Science Foundation of China (21476229, 21376236, 21503264).

N₂O is a promising green propellant and exhibits great potential for satellite propulsion systems. It is difficult for catalytic decomposition, which is an important way to initiate the propulsion process, to occur at temperatures below 600℃ due to the high activation energy of N₂O. In this work, we report an Ir supported on rutile TiO₂ (Ir/r-TiO₂) catalyst which exhibits a fairly high activity for high-concentration N₂O decomposition. HAADF-STEM, H₂-TPR, and XPS results indicate that highly dispersed Ir particles and improved oxygen mobility on the Ir/r-TiO₂ could facilitate the decomposition of N₂O and desorption of the adsorbed oxygen. Bridge-bonded peroxide intermediates were observed with in-situ DRIFT and herein, a detailed decomposition route is proposed.
- Heterogeneous catalysis,
- Nitrous oxide,
- Catalytic decomposition,
- Iridium catalyst,
- Titania
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Superior performance of iridium supported on rutile titania for the catalytic decomposition of N₂O propellants