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The anodic oxidation of oxalic acid on Au

Steven C. Mueller

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Abstract

The anodic oxidation of oxalic acid on Au has been studied at 80°C in aqueous media. The reaction rate was measured as a function of potential, oxalic acid concentration, pH, and temperature in H2so 4-K2so4-KoH solutions of unit ionic strength. The oxalic acid was oxidized only in acidic media. •rhe oxidation to co2 was essentially complete. A first order dependence of the rate on both pH and undissociated oxalic acid was found. A mechanism is proposed in which the first decarboxylation is the rate determining step.

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The anodic oxidation of oxalic acid on Au has been studied at 80°C in aqueous media. The reaction rate was measured as a function of potential, oxalic acid concentration, pH, and temperature in H2so 4-K2so4-KoH solutions of unit ionic strength. The oxalic acid was oxidized only in acidic media. •rhe oxidation to co2 was essentially complete. A first order dependence of the rate on both pH and undissociated oxalic acid was found. A mechanism is proposed in which the first decarboxylation is the rate determining step.

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Available abstract

The anodic oxidation of oxalic acid on Au has been studied at 80°C in aqueous media. The reaction rate was measured as a function of potential, oxalic acid concentration, pH, and temperature in H2so 4-K2so4-KoH solutions of unit ionic strength. The oxalic acid was oxidized only in acidic media. •rhe oxidation to co2 was essentially complete. A first order dependence of the rate on both pH and undissociated oxalic acid was found. A mechanism is proposed in which the first decarboxylation is the rate determining step.

Key concepts: Oxalic acid, Chemistry, Decarboxylation, Inorganic chemistry, Anode, Aqueous solution, Ionic strength, Aqueous medium

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