Catalytic Properties of PEDOT-Co3O4@Mn3O4/Mn2O3 Nanomaterials in HER Reactions and Their Application in Capacitors.

Polymer catalyst electrodes have good electrical conductivity, high mechanical strength and other characteristics, which have good prospects in the future market of green and low carbon. In this paper, the electrode of PEDOT polymer catalyst is studied, and the electrochemical performance of the electrode is improved by doping different metals. This study describes the design of PEDOT-Co₃O₄@Mn₃O₄/Mn₂O₃ catalysts by simple solvothermal synthesis. As a catalyst in the hydrogen evolution reaction (HER), the overpotential of the same polarization curve is much smaller than that of PEDOT, with a Tafel slope of 118.21 mV dec^‐1, by electrochemical and characterization analysis. In the test of the supercapacitor performance, it has a large specific capacitance of 1298.5 Fg^-1 and a small electrical impedance (0.21 Ω). After 2000 cycles of CV test, the capacitance remains 87.76 %, and the curve shape is stable, which proves that it has good electrochemical performance. Our results confirm the materials have great application prospects in HER and capacitors.