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电催化还原二氧化碳制备甲酸是备受关注的热点问题。而电极材料是决定还原效率的重要因素。本文通过电沉积方法在泡沫铜上直接制备纳米结构硫化亚铜薄膜,并采用扫描电镜(SEM)、X射线衍射(XRD)对其结构性能进行了系统研究。以硫化亚铜作为阴极电催化材料、0.5 mol·L~(–1) 1-丁基-3-甲基咪唑四氟硼酸盐的乙腈溶液为电解液,在该体系中可高效催化转化二氧化碳为甲酸。结果表明,这一电解体系可有效实现电化学反应,甲酸的法拉第效率(FEHCOOH)可以达到85%,同时甲酸还原电流密度可达到5.3 mA·cm~(–2)。
Electrocatalytic reduction of carbon dioxide to formic acid is a hot issue of great concern. The electrode material is an important factor in determining the efficiency of reduction. In this paper, the nanostructured CuS films were directly prepared on the foam copper by electrodeposition. The structural properties of the films were systematically studied by scanning electron microscopy (SEM) and X-ray diffraction (XRD). Using cuprous sulphide as cathode electrocatalytic material, acetonitrile solution of 0.5 mol·L -1 1-butyl-3-methylimidazolium tetrafluoroborate was used as the electrolyte. In this system, carbon dioxide For formic acid. The results show that the electrolysis system can effectively achieve electrochemical reaction, the Faradic efficiency (FEHCOOH) of formic acid can reach 85%, and the reduction current density of formic acid can reach 5.3 mA · cm ~ (-2).