Nanocomposites of palladium nanoparticle-loaded mesoporous carbon nanospheres for the electrochemical determination of hydrogen peroxide

► Pd nanoparticles are homogeneously in situ loaded on a novel MCNs matrix. ► The hybrid Pd/MCNs show enhanced catalytic activity toward the reduction of H2O2. ► The Pd/MCNs based sensor exhibits high sensitivity and low detection limit to H2O2. ► The MCNs is a promising support for other catalysts.