Cl掺杂CuO在Cu^(+)和O空位协同作用下高效电催化还原CO_(2)为C_(2)H_(4)

Efficient electrocatalytic reduction of CO_(2)to ethylene over chlorine-doped CuO catalyst under synergistic effect of Cu^(+)and O vacancies

通过简单的一步水热合成法合成具有富集Cu^(+)和氧空位活性位点的氯掺杂氧化铜催化剂(Cl-CuO),并通过调节氯元素的掺杂量使得Cu基催化剂对乙烯(C_(2)H_(4))拥有较高的选择性和法拉第效率(FE)。结果表明,在-1.2 V[针对可逆氢电极(RHE)]下,C_(2)H_(4)的最大法拉第效率为46.8%;并且在经过15 h电解后,法拉第效率和电流密度无明显下降。Cl-CuO中C_(2)H_(4)的生成归因于Cu^(+)与氧空位的协同作用。

A chlorine-doped copper oxide catalyst(Cl-CuO)with enrichment of Cu^(+)and oxygen vacancy active sites is synthesized via a simple one-step hydrothermal synthesis method.By adjusting the doping amount of chlorine,Cl-CuO catalyst obtains high selectivity and Faraday efficiency(FE)for ethylene.Results show that at-1.2 V(for a reversible hydrogen electrode),ethylene has a maximum Faraday efficiency of 46.8%.After 15 h electrolysis,Faraday efficiency and current density have not decreased significantly.The formation of ethylene in Cl-CuO is attributed to the synergistic action of Cu^(+)and oxygen vacancies.