H-ZSM-5 loaded with silver cations (Ag/H-ZSM-5) catalyzed conversion of CH 4 to higher hydrocarbons such as C 3 H 6 in the presence of C 2 H 4 . The effect of the reaction parameters, such as reaction temperature, were examined. The maximum conversion of methane was 13.2 mol% at 673 K. The reaction of C 2 H 4 with 13 Clabelled methane ( 13 CH 4 ) yielded singly 13 C-labelled propylene ( 13 CC 2 H 6 ) and H 2 , while formation of 13 CC 2 H 6 was not observed over H-ZSM-5. These results indicate that the formation of 13 CC 2 H 6 proceeds by the reaction of C 2 H 4 with 13 CH 4 , and that the activation of 13 CH 4 proceeds on silver cations. Ag/H-ZSM-5 also catalyzed the reaction of C 3 H 6 and benzene with CH 4 to form butenes and toluene, respectively.

1H magic angle spinning NMR gave firm evidence for formation of acidic protons (4.0 ppm) and hydride species (−1.8 ppm), where the former exists as OH groups (acidic protons) and the latter has an interaction with three equivalent Ag atoms, existing as Ag3H when Ag+-exchanged A-zeolite is reduced with hydrogen. The formations of Ag3H and of acidic protons by the heterolytic dissociation of H2 over Ag3 + are reversible. The heterolytic dissociation of H2 was also observed over Ag-Y-zeolite, the silver hydride species being observed at −0.1 ppm.

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A H2-NO fuel cell was designed for the synthesis of hydroxylamine in the gas phase. The hydroxylamine produced was trapped in an aqueous solution of 113504 held in a silica-wool disk used as an electrolyte barrier for H2 and NO. Among the cathode electrocatalysts tested, iron-phthalocyanine (Fe-Pc) impregnated in graphite was the most favorable one for selective synthesis of hydroxylamine. Active carbon and carbon whiskers used to support the Fe-Pc enhanced the formation of hydroxylamine remarkably. The carbon itself slightly catalyzed the formation of N2O and NH3. Excluding the effects of the support, Fe-Pc catalyzed the electrocheinical synthesis of hydroxylamine with high selectivity (10O%). Applied voltage across the cell did not appreciably enhance the formation of hydroxylamine. The reaction under shortcircuit conditions was most favorable for the synthesis of hydroxylamine. It is suggested that the reduction of NO occurs on the Fe2 site of Fe-Pc with protons and electrons transferred from the anode. The very selective synthesis of hydroxylamine over Fe-Pc must be ascribed to an Fe2 site isolated by phthalocyanine ring. This isolation prohibits both the formation of N,O through the intramolecular elimination of 1120 from the adjacent NHO intermediates and the formation of N, and NH3 through the breaking of N-O bonds.Salts of hydroxylamine and their solutions are of great industrial importance as intermediates, particularly in the ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 130.102.42.98 Downloaded on 2015-06-20 to IP