Cu_(4)SnS_(4)的制备及其电催化还原CO_(2)性能的研究

Preparation of Cu_(4)SnS_(4) Catalyst and its Performance in Electrocatalytic Reduction of CO_(2)

通过溶剂热法合成三元硫属化合物CTS(Cu_(4)SnS_(4)).利用X-射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、电化学阻抗(EIS)、电化学活性表面积(ECSA)、塔菲尔斜率(Tafel)等对样品的结构、形貌和电催化还原CO_(2)(CO_(2)RR)性能进行了探究.实验结果表明,Cu_(4)SnS_(4)电催化还原CO_(2)的能力比相应的二元金属化合物SnS2,Cu2S和Cu10Sn3材料明显提升.其中200℃、24 h制备的纯相Cu_(4)SnS_(4)催化剂性能最好,在-1.0 V(vs.RHE)电位下,电流密度稳定可达到18 mA/cm^(2),甲酸盐的选择性高达75%.

A ternary sulfur compound CTS(Cu_(4)SnS_(4))was synthesized by a simple solvothermal method.The structure,morphology and electrocatalytic reduction of CO_(2)(CO_(2) RR)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 Cu_(4)SnS_(4) catalyst for electrocatalytic reduction of CO_(2) is significantly improved than SnS_(2),Cu_(2)S and Cu_(10)Sn_(3).Among them,the pure phase Cu_(4)SnS_(4) 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%.