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。
Synthesis of One-Dimensional Cuprous Selenide and Its Electrocatalytic Performance for Carbon Dioxide Reduction
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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