LAUSR

Abstract Sc 2 O 3 -magneli phase titanium (Sc 2 O 3 -MPT) composite electrode was successfully fabricated via a simple pressing-sintering method and used for electrocatalytic degradation of methyl orange (MO). It was shown that Sc 2 O 3 was successfully composited with MPT. Compared with MPT electrode, Sc 2 O 3 -MPT composite electrode had less spherical particles and more pores. Linear scanning voltammetry indicated that Sc 2 O 3 -MPT composite electrode presented higher oxygen evolution overpotential than MPT electrode, suggesting that Sc 2 O 3 -MPT electrode was much more suitable for the degradation of MO. The electrocatalytic degradation of MO was evaluated under different parameters including current density, temperature, initial pH and electrolysis time. Under the optimal parameters (current density 10 mA cm −2 , temperature 25 °C, initial pH 3 and electrolysis time 120 min), the degradation efficiency of MO on Sc 2 O 3 -MPT composite electrode reached up to 90.16%. All these results demonstrated that Sc 2 O 3 -MPT composite electrode was effective for electrocatalytic degradation of MO and had a great potential application in the treatment of dyes wastewater.