Nano-hybrid bimetallic Au-Pd catalysts for ambient condition-catalytic wet air oxidation (AC-CWAO) of organic dyes

•Highly active and stable nano-hybrid bimetallic catalysts were synthesized.•Au-Pd(1:1)/NM-400 possessed highest catalytic activity for AC-CWAO of organic dyes.•Au-Pd(1:1)/NM-400 could degrade high concentration dye at temperature close to 0 °C.•Superoxide radical (O2−) is the main active oxidative specie during CWAO of dyes.