Preparation of Cerium Doped Cuprous Oxide and Its Performance in Electrocatalytic CO2 Reduction to Ethylene
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维普
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使用可再生电能驱动二氧化碳还原的反应具有条件绿色温和、反应可控的优点,其产物的组成与生成效率由催化剂的组分、结构决定.铜基催化剂可以将二氧化碳电还原为高附加值的多碳产物.然而,Cu+催化活性中心容易被还原,不稳定,导致产物选择性差和稳定性差.基于此,本文通过铈元素掺杂调控了 Cu2O的电子结构,提升了 Cu+的催化活性.铈元素掺杂的Cu2O催化剂具有10％以上的乙烯法拉第效率,其中-1.2 V vs HER时,Ce-Cu2O生成C2H4的法拉第效率可以达到17.8％;同时,Ce-Cu2O也展现出优异的循环稳定性,这为CO2电化学还原长期稳定运行提供了材料基础.
The use of renewable electricity to drive carbon dioxide reduction reactions has the advantage of being environ-mentally friendly,mild,and controllable.The composition and yield of the product are determined by the components and structure of the catalyst.Copper-based catalysts can electrochemically reduce carbon dioxide into high-value multi-carbon products.However,the Cu+catalytic active center is easily reduced,unstable,leading to poor product selectivity and stabili-ty.Based on this,the electronic structure of Cu2O was modulated by cerium element doping,thereby enhancing the catalytic activity of Cu+.The Ce-doped Cu2O catalyst has a Faraday efficiency of over 10％for ethylene,with a Faraday efficiency of 17.8％for the production of C2H4 at-1.2 V vs HER for CeCu2O.Meanwhile,Ce-Cu2O also exhibits excellent cycling stabil-ity,which provides a material basis for the long-term stable operation of CO2 electrochemical reduction.
维普
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