A facile synthesis of high entropy alloy nanoparticle–activated carbon nanocomposites for synergetic degradation of methylene blue

CoCrFeMnNi HEA NPs–AC were synthesized facilely with FCC solid solution phase and outstanding catalytic performance. The time required to reduce MB concentration can be as short as 12 min with the k_obs of 0.191 min⁻¹ for the 10 wt% catalyst.