![]() ![]() The ratio of currents in the “double layer” to those in the “hydride” region in the potentiodynamic responses of these surfaces (0.5 M H 2SO 4, 25 ☌, sweep range 0.025−0.70 V, 5 mV/s) increased as the equivalents of Ru adatoms increased. A series of Pt−Ru ad surfaces were prepared by interrupting the hydrogenation after deposition of 0.05, 0.10, 0.30, 0.32, 0.44, 0.70, and 3.5 equiv of Ru adatoms. Ru adatoms were deposited on black Pt gauze by hydrogenating Ru(COD)(η 3-C 3H 5) 2 ( 1, COD is 1,5-cyclooctadiene) over the gauze at low temperatures in hexanes solution under 1 atm of dihydrogen gas.
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