Synthesis of One-Dimensional Cuprous Selenide and Its Electrocatalytic Performance for Carbon Dioxide Reduction
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硒化亚铜具有多重氧化态和高导电性等优点,被电催化研究者所青睐.本文采用水合肼还原法制备了硒化亚铜(Cu2-xSe)纳米材料,并对其进行物理化学性质及电化学性能进行了表征.结果表明,Cu2-xSe纳米催化剂相比于铜纳米颗粒,有效地提高了催化剂CO2RR的性能.直径约为10 nm的硒化亚铜纳米线(Cu2-xSe NWs)具有最优的电催化CO2还原性能,在-1.09 V vs.RHE电势下,表现出94.2％的甲酸法拉第效率(FEHCOOH)和20 h运行稳定性.这种通过Se的引入及催化剂结构控制提高其电催化活性的策略,对于开发廉价高效的电催化剂具有重要意义.
Copper selenide electrocatalyst was favored by researchers because of its multiple oxidation states and high electrical conductivity,etc.This article prepared one-dimensional copper selenide(Cu2-xSe)nanomaterials using hydrazine hydrate reduction method.Their physical and chemical properties,and electrochemical CO2 RR performance were characterized.The results showed that Cu2_xSe nanocatalysts effectively improved the catalytic performance of CO2RR compared to Cu nanoparticles.The best performance was achieved by copper selenide nanowires(Cu2-xSe NWs)with a diameter of about 10 nm.At-1.09 V vs.RHE,it exhibited formic acid Faraday efficiency(FEHCOOH)of 94.2％and maintained stability in 20 h of operation.This strategy to increase the electrocatalytic activity through the introduction of Se and one-dimensional structure is of great significance for the development of cost-effective electrocatalysts.
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