Direct decomposition of nitrogen monoxide on (Ho, Zr, Pr)(2)O3+delta Catalysts

作者：Tsujimoto Soichiro; Nishimura Chiya; Masui Toshiyuki; Imanaka Nobuhito^*

来源：Catalysis Communications, 2014, 43: 84-87.

DOI：10.1016/j.catcom.2013.09.013

• Direct NO decomposition
• C-type cubic structure
• Rare earth oxide
• Coexisting gas resistance

C-type cubic holmium oxide (Ho2O3), which has a large number of basic sites, was employed as a host material for NO decomposition catalysts, and zirconium and praseodymium ions were introduced into the lattice to increase the surface area and to control O-2 desorption ability of Ho2O3, respectively. The highest catalytic activity was obtained for (Ho0.87Zr0.05Pr0.08)(2)O3.05+delta, on which the NO conversion to N-2 was as high as 71% at 900 degrees C in the absence of coexisting gases (NO/He atmosphere). The catalytic activity was maintained at a high conversion ratio even in the presence of the coexisting gases; the Ny yields of 50% and 47% were obtained even in the presence of 5 vol% O-2 and CO2, respectively.

• 出版日期2014-1-5