Cobalt molybdenum carbides as anode electrocatalyst for proton exchange membrane fuel cell

Cathode catalysts for fuel cell development: A theoretical study based on band structure calculations for tungsten nitride and cobalt tungsten nitrides

“…In previous studies, we have applied the transition metal carbides, such as bimetallic tungsten carbides [1,2] and molybdenum carbides [3,4], as anode catalysts with high activities. These transition metal carbide catalysts were not suitable as cathode catalysts.…”

Characterization and performances of cobalt–tungsten and molybdenum–tungsten carbides as anode catalyst for PEFC

“…For all the cathodes, a sheet of commercial 20% Pt/C (Electrochem Co.) was used. The MEA was prepared in-house by a previous method [13] and is briefly described as follows. A polymer-base membrane sheet (Nafion 117, DuPont Co.) was boiled in 3% aqueous hydrogen peroxide solution, deionized water, and then in 0.5 M sulfuric acid solution at 363 K before drying at 393 K in air overnight.…”

“…by a water vapor treatment. The performance of nickel-tungsten (NiWC) and cobalt-molybdenum carbides (CoMoC) was reported to be about 10% of that of a Pt/C catalyst in a single-stack fuel cell [12,13]. Their studies showed that the preparation procedure for carbides is crucial for their electrocatalytic activity because different surface species and bulk phases have been found to decisively influence the activity for HOR.…”

On the Synthesis of Molybdenum Carbide With Cobalt Addition via Gas-Solid Reactions in a Ch4/H2 Atmosphere

“…Most of these materials are also prepared with high carbon source content in the gas mixture: ≥20% for CH4 (Cheng and Huang, 2004;Nagai et al 2007;Izhar and Nagai, 2008;Izhar et al, 2009;Ma et al, 2014) or ≥10% for C2H6 (Al-Megren, 2005;AlMegren, 2007). This can produce a higher free carbon percentage in the final product and ultimately impair the catalytic process.…”