一维硒化亚铜的合成及其电催化二氧化碳还原性能的研究
Synthesis of One-Dimensional Cuprous Selenide and Its Electrocatalytic Performance for Carbon Dioxide Reduction
陈瀚遐 1程志翔 1徐晓雪 1汪黎东 1李金梦1
作者信息
- 1. 华北电力大学环境科学与工程学院,北京 102200
- 折叠
摘要
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.
Abstract
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.
关键词
电催化/二氧化碳还原反应/硒化亚铜纳米线/甲酸Key words
electrocatalyst/carbon dioxide reduction reaction/copper selenide nanowires/formic acid引用本文复制引用
出版年
2024
NETL
NSTL
万方数据