New Electrocatalysts for Electro-Oxidation of Methanol Prepared by Bönnemann´s Method

Abstract

Pt-Ru/C, Pt-Dy and Pt-Ru-Mo/C electrocatalysts prepared by Bönnemann´s method have been studied as porous thin films on high surface area carbon electrodes, in order to evaluate their electroactivity on CO desorption in PEM fuel cells. For comparison electrode precursor powders with and without thermal treatment were considered. Cyclic voltammetry showed that addition of Mo in the well-established Pt/Ru system is very promising for methanol oxidation. In order to compare the electroactivity of different catalysts a normalization procedure based on the amount of Pt was used.

Direct Alcohol Fuel Cells: A Comparative Review of Acidic and Alkaline Systems

“…have been alloyed with Pt and investigated for MOR [219][220][221][222][223][224][225]; among these, Ru has been found to be the most active. To reduce the amount of noble metals and increase the catalyst utilization, the approach of dispersing active nanoparticles onto suitable conductive supports, such as carbonaceous materials, has been used [226][227][228] (several researchers have also pursued the synthesis of multiple-component electrocatalysts such as PtRuM [229][230][231][232][233][234][235][236][237][238][239][240] and PtMO x (M = Ti, V, Mn, W, Ni, Mo, etc.) [241][242][243][244]).…”

Preparation and characterization of Pt/Pt:CeO2−xnanorod catalysts for short chain alcohol electrooxidation in alkaline media

“…2 Among the direct alcohol fuel cells (DAFCs), direct methanol fuel cells (DMFC) have been extensively studied and evaluated for vehicle transportation applications partially because of the ease of large scale industrial methanol production. 3 The biorenewable nature of ethanol and its lower toxicity make it as another attractive alternative of alcohol fuels. 4,5 Though the energy densities of ethanol is 30+% higher than that of methanol (8.01 kW h kg À1 versus 6.09 kW h kg À1 ), 6 the current efficiency of direct ethanol fuel cells reported in literature is typically less than those observed with direct methanol fuel cells.…”

Direct Methanol Fuel Cell with Extended Reaction Zone Anode

“…Nanoparticle catalysts (2 nm average size) produced by the Bönnemann method having a PtRuMo atomic composition of 1:1:1 were compared with PtRu (1:1) at ambient conditions. The Mo containing catalyst yielded a 100 mV lower methanol oxidation onset and an almost fivefold increase in mass activity at 0.6 V vs. RHE (7). Lima et al compared PtRu and PtRuMo dispersed onto polyaniline.…”