Abstract <p>Fe₇₈Si₇B_12.4P₂Y_0.6 amorphous alloy ribbons are proved to show excellent degradation performance in the treatment of dyes with diverse structures. The Fe₇₈Si₇B_12.4P₂Y_0.6 amorphous alloy ribbons can degrade Orange II azo dye, Malachite green (MG) diamino-triphenylmethane dye and their mixed dye almost completely within 10 min. Analysis of the surface morphologies and electronic structure before and after degradation reveals that the densely distributed nano-porous structure and the galvanic cell formed between Fe–P and Fe-B contribute to enhancing the degradation performance in Fenton-like process. The reaction rate constant of MG dye is 0.269 min⁻¹, which is higher than that of orange II azo dye (0.123 min⁻¹), indicating that different dye structure have certain effects on the degradation performance of the alloy under the same reaction conditions. Furthermore, the degradation performance of Fe₇₈Si₇B_12.4P₂Y_0.6 amorphous alloy ribbons on MG dye was also evaluated under various Fenton-like reaction conditions, including different initial dye concentrations, temperatures, pH levels, and catalyst additions. The results showed that the optimum reaction conditions: C_cat = 6 g/L, C_{MG dye} = 10 mg/L, C_H2O2 = 10 mM, pH = 3, T = 65 ℃. This study has great practical significance for promoting the industrial application of Fe-based amorphous alloys.</p> Graphical Abstract <p></p>