Preparation of Cu4SnS4 Catalyst and its Performance in Electrocatalytic Reduction of CO2
A ternary sulfur compound CTS(Cu4SnS4)was synthesized by a simple solvothermal method.The structure,morphology and electrocatalytic reduction of CO2(CO2RR)properties of the samples were investigated by X-ray diffraction(XRD),Scanning electron microscopy(SEM),Transmission electron microscopy(TEM),Electrochemical impedance(EIS),Electrochemically active surface area(ECSA)and Tafel slope et al.The experimental results show that the ability of Cu4SnS4 catalyst for electrocatalytic reduction of CO2 is significantly improved than SnS2,Cu2S and Cu10Sn3.Among them,the pure phase Cu4SnS4 catalyst prepared at 200℃ and 24h has the best performance,and the current density can reach 18mA·cm-2 at-1.0V(vs.RHE)potential,and Faradaic efficiency of the formate is as high as 75％.
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