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Remarkable production of naphthalene and benzene is found in the dehydrocondensation of methane under nonoxidative conditions on Co-and Fe-modified Mo/HZSM-5 catalysts at 973 K and 1 atm pressure of methane.

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A combined XRD and XPS study showed that the Au1/ZSM-5 zeolite (Au 4f7p,5p = 85.6 and 89.2 eV) can be prepared by spontaneous monolayer dispersion of AuCl3 in ZSM-5 followed by reductive carbonylation with CO at 343 K. The in-situ FTIR shows that the intrazeolite Aul in ZSM-5 provides Aul carbonyl (YCO = 2170 cm-') and nitrosyl ( y~o = 1817 cm-l) on chemisorption of CO (5-350 Torr) and N O (5-50 Torr) at 300 K, respectively. The interaction of CO and NO on Au1/ZSM-5 results in surface intermediates such as Au1(N0)2 NO = 1837 and 1741 cm-l) and AuIN02 (1620 and 1302 cm-l), which are catalytically active in NO reduction with CO producing N2O and C02 at 293-373 K.

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MgO-Si02 (molar ratio = 1 : 1) prepared from ethyl orthosilicate and magnesium nitrate and promoted with 0.1 vvt% NazO exhibited a high catalytic activity (100%) and selectivity (87%) for formation of buta-1,3-diene at 350 "C.