Electro‐oxidation of Methanol in Sulfuric Acid Electrolyte on Platinized‐Carbon Electrodes with Several Functional‐Group Characteristics

Abstract

The effect of acid/base functional-groups associated with platinized-carbon electrodes on their catalytic activity toward electro-oxidation of methanol in sulfuric acid electrolyte at 60~ is studied. Platinized-carbon electrodes with small amounts of functional groups exhibit higher catalytic activity compared to those with large concentrations of acidic/basic surface functionalities. The overpotential for methanol oxidation is minimum on electrodes of platinized carbons with pHzpc values between 6 and 7. An x-ray photoelectron spectroscopic study of various platinized carbons suggests that the acid/base surface functional-groups produce ample amounts of surface Pt-oxides and a consequent decrease in activity toward methanol oxidation.

Carbon-supported Pt–Co nanoparticles as anode catalyst for direct borohydride-hydrogen peroxide fuel cell: Electrocatalysis and fuel cell performance

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Size Effects in Electrocatalysis of Fuel Cell Reactions on Supported Metal Nanoparticles

“…For example, Shukla and co-workers established a correlation between electrocatalytic activity for the MOR and the concentration of surface functional groups [Shukla et al, 1994]. Pt nanoparticles were supported on Ketjenblack carbons with different concentrations of acid/base functional groups.…”

Development of sensitive determination method for platinum in geological materials by carbon slurry sampling graphite furnace atomic absorption spectrometry

“…The Pt 4f region consists of two groups of twin peaks. The most intensive doublet (4f 7/2 A and 4f 5/2 A) at 72.39 and 75.74 eV of binding energy is assigned to Pt(II) species [34] at the amount of about 82.3% of the total Pt adsorbed on the activated carbon. The second Pt species found at 74.02 and 77.37 eV (4f 7/2 B and 4f 5/2 B), giving about 17.7% of the total Pt is assigned to Pt(IV).…”