TY - JOUR
T1 - Unambiguous evidence supporting the decomposition reaction of NO on two types of monovalent copper-ion in CuZSM-5 zeolite
AU - Itadani, Atsushi
AU - Kuroda, Yasushige
AU - Tanaka, Masashi
AU - Nagao, Mahiko
N1 - Funding Information:
This work was supported partly by a Grant-in-Aid for Scientific Research (Nos. 15350082 and 15550120) from the Ministry of Education, Culture, Sports, Science and Technology of Japan. One of authors (A.I.) thanks to the Research Fellowship from Okayama University.
PY - 2005/11/28
Y1 - 2005/11/28
N2 - By combining the methods of calorimetry and spectroscopy using CO as a probe molecule, we obtained the evidence supporting the decomposition reaction of NO on two types of monovalent copper-ion (Cu+) species in CuZSM-5 zeolite. These Cu+ species showed the characteristic emission bands at 21,000 and 18,500 cm-1 and, respectively, gave the CO adsorption heats of 122 and 110 kJ mol-1. Taking account of our previous EXAFS data, it was found that the former species take the two-coordinated structure involving lattice oxygen atoms, while the latter ones the three-coordinated structure. In this paper, we also emphasized the validity of our original assignment of active sites on CuZSM-5 for N2 adsorption at room temperature; three-coordinated Cu+ species adsorb N2 molecules.
AB - By combining the methods of calorimetry and spectroscopy using CO as a probe molecule, we obtained the evidence supporting the decomposition reaction of NO on two types of monovalent copper-ion (Cu+) species in CuZSM-5 zeolite. These Cu+ species showed the characteristic emission bands at 21,000 and 18,500 cm-1 and, respectively, gave the CO adsorption heats of 122 and 110 kJ mol-1. Taking account of our previous EXAFS data, it was found that the former species take the two-coordinated structure involving lattice oxygen atoms, while the latter ones the three-coordinated structure. In this paper, we also emphasized the validity of our original assignment of active sites on CuZSM-5 for N2 adsorption at room temperature; three-coordinated Cu+ species adsorb N2 molecules.
KW - CO adsorption
KW - CuZSM-5
KW - Monovalent copper-ion
KW - N adsorption
KW - NO decomposition
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U2 - 10.1016/j.micromeso.2005.07.011
DO - 10.1016/j.micromeso.2005.07.011
M3 - Article
AN - SCOPUS:27644503554
VL - 86
SP - 159
EP - 165
JO - Microporous and Mesoporous Materials
JF - Microporous and Mesoporous Materials
SN - 1387-1811
IS - 1-3
ER -