Hydrogen production performance of the non-platinum-based MoS2/CuS cathode in microbial electrolytic cells
MoS2/CuS composite catalysts were successfully synthesized using a one-step hydrothermal method with sodium molybdate dihydrate,thiourea,oxalic acid,and copper nitrate trihydrate as raw materials.The hydrogen pro-duction performance of MoS2/CuS prepared with different molar ratios of Mo to Cu precursors(nMo∶nCu)as cathodic catalysts was investigated in the two-chamber microbial electrolytic cell(MEC).X-ray diffraction(XRD),X-ray pho-toelectron spectroscopy(XPS),scanning electron microscopy(SEM),transmission electron microscope(TEM),linear scanning voltammetry(LSV),electrochemical impedance analysis(EIS),and cyclic voltammetry(CV)were used to characterize the synthesized catalysts for testing and analyzing the hydrogen-producing performance.The results showed that the hydrogen evolution performance of MoS2/CuS-20％(nMo∶nCu=5∶1)was better than that of platinum(Pt)mesh,and the hydrogen production rate of MoS2/CuS-20％as a cathode in MEC was(0.203 1±0.023 7)mH23·m-3·d-1 for 72 h at an applied voltage of 0.8 V,which was slightly higher than that of Pt mesh of(0.188 6±0.013 4)mH23·m-3·d-1.The addition of a certain amount of CuS not only regulates the electron transfer ability of MoS2 but also increases the density of active sites.
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