A New Type of Gaseous Catalysis

Gas-Phase Ion Chemistry of the Noble Gases: Recent Advances and Future Perspectives

“…An ion with m/z = 6 was also observed and assigned as HeH 2 + . Meanwhile, Lind and Bardwell 24,25 recognized the ability of noble gas ions to catalyze the polymerization of acetylene, cyanogens and hydrogen cyanide. They suggested the active role of clustering about the ionic centers and, 35 years later, a Xe(CN) 2 + complex was actually observed by mass spectrometric methods.…”

The Physical Nature of Supported Platinum

“…(arbitrary units). 1 It is seen that there is general agreement between the two methods of determining Pt dimensions including instances where H2 adsorption data indicate that the particles are too small to be "visible" in X-ray determination. The effective lower limit with our instrument was approximately 50 Á. because (1) we were using the strongest Pt diffraction line which is superimposed on a 7-Al2Og line and (2) the Pt concentration was at most 0.58%.…”

“…Introduction Studies of the influence of inert gases on chemical reactions induced in gases by the absorption of energy from highly ionizing radiation are being continued. [1][2][3][4][5][6] In the present work we have ex-…”

Studies of the initial steps in the polymerization of C2N2 induced by Xe+

“…For the The rate of radiolytic polymerization of C2N2 is known to be enhanced by noble gases approximately in proportion to the stopping power of the noble gas (1). This increase in rate has been explained in terms of an initial charge transfer reaction involving the rare gas ion for those noble gases which have a higher ionization energy than CzNz (2). Xenon has been viewed as an exception because of its relatively low ionization energy and it has been argued that the simple charge transfer theory cannot explain the observations with xenon additive (3).…”

“…Xenon has been viewed as an exception because of its relatively low ionization energy and it has been argued that the simple charge transfer theory cannot explain the observations with xenon additive (3). An alternative mechanism has been proposed in which a complex of the type [XeCIN?lf is invoked as an intermediate in a sequence of steps [ I ] to [3] [I] Xe -+ Xe' + e- [2] Xe' + C2N2 + [XCCZNZ*] ' where n and m equal 1 to 4 but 12 is not necessarily equal to tn. p = 4 -tz and q = 4 -m (1,3).…”