Kinetic study of the electrocatalytic oxidation of acetaldehyde at Ni/Al layered double hydroxide modified sol-gel derived carbon ceramic electrode

In this research, the Ni/Al layered double hydroxide modified sol gel derived carbon ceramic (Ni/Al LDH-SGD-CC) electrode was used for electrocatalytic oxidation of acetaldehyde. The oxidation of acetaldehyde happens at the potential where Ni (III) species are generated. The modified electrode exhibited remarkable electrocatalytic activity for the oxidation of acetaldehyde under alkaline conditions; it indicated that the anodic oxidation of acetaldehyde could be catalyzed at Ni/Al LDH-SGD-CC electrode. This proves that the Ni/Al LDH bears the main role in electro-catalytic oxidation of acetaldehyde. The catalytic rate constant, charge-transfer coe?cient, the number of electrons involved in the rate-determining step (n?) and exchange current density for chemical reaction of acetaldehyde were estimated as 0.356 × 104 cm3 mol-1 s-1, 0.51, 1 and 2.76×10-8 Acm-2 respectively.