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Novel carbons from the Sibunit family prepared via pyrolysis of hydrocarbons (Yermakov YI, Surovikin VF, Plaksin GV, Semikolenov VA, Likholobov VA, Chuvilin AL, Bogdanov SV (1987) React Kinet Catal Lett 33:435) possess a number of attractive properties for fuel cell applications. In this work...
The cathode catalysts in low temperature fuel cells are associated with major cell efficiency losses, because of kinetic limitations of the oxygen reduction reaction. Additionally, methanol oxidation at the cathode leads to significant lowering of the efficiency in direct methanol fuel cells,...
The determination of the surface area of Pt and Ru electrocatalyst surfaces by oxidation of adsorbed CO and by oxidation of a Cu upd layer are compared. The amount of adsorbed CO was determined mass-spectrometrically from the ionic current for CO 2 formation during an oxidative potential sweep....
Reductive annealing was chosen as a method for the syntheses of Se modified Ru/C catalysts. Initial preparation of a 20 wt% Ru/C was performed by impregnating RuCl 3 ·2H 2 O on Vulcan XC72 with subsequent conditioning using H 2 at 250 °C for 4 h. Surface treatment of Ru/C by SeO 2 followed by...
WO 3 -modified carbon-supported bi-component ruthenium–selenium, RuSe x (Ru, 20; Se, 1 wt%), nanoparticles were dispersed in the form of Nafion-containing inks on glassy carbon electrodes to produce electrocatalytic interfaces reactive towards electroreduction of dioxygen in acid medium (0.5...
This work presents a new concept for realising a reference electrode configuration in a PEM fuel cell by means of laser ablation. The laser beam is used to evaporate a small part of the electrode of a catalyst-coated membrane (CCM) to isolate the reference electrode from the active catalyst...
Cathode catalyst layers were prepared and characterized as part of membrane electrode assemblies (MEA) and catalyst coated membranes (CCM) on the basis of carbon supported methanol tolerant RuSe x catalysts. Preparation parameters varied were: catalyst loading (0.5–2 mg RuSe x cm −2 ), PTFE...
Carbon supported Ru x Se y O z catalysts were prepared from Ru 3 (CO) 12 and RuCl 3 · x H 2 O as ruthenium precursors and H 2 SeO 3 and SeCl 4 as the selenium sources. Highly active catalysts for the oxygen reduction reaction (ORR) in direct methanol fuel cells (DMFC) were obtained via a...
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