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Platinum-Rhodium Alloy Electrocatalyst Activities In The Methanol Oxidation Reaction, William R. Sandorf
Platinum-Rhodium Alloy Electrocatalyst Activities In The Methanol Oxidation Reaction, William R. Sandorf
Williams Honors College, Honors Research Projects
This study evaluates the electrochemical activity of several compositions of platinum-rhodium alloys on carbon support to identify potential replacements for the expensive platinum electrocatalysts currently used in direct methanol fuel cells (DMFCs). The electrochemical active surface areas (ECSAs) of each sample were determined using cyclic voltammetry (CV) in a 0.5 M H2SO4 solution to normalize CV currents generated in the methanol oxidation reaction (MOR). The activity of five compositions was tested; Pt3Rh, Pt2Rh, PtRh, Pt2Rh, and Pt3Rh. 100 mg of each catalyst was synthesized at 10% by weight platinum …