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碳烟颗粒掺杂铅基复合阳极的制备及电化学性能研究
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1.昆明理工大学 冶金与能源工程学院;2.铜仁学院 材料与化学工程学院

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国家自然科学基金资助(51864042,51664040);昆明理工大学分析测试基金(2021M20202202087);贵州省高层次留学人才创新创业择优资助项目(2020)12号


Preparation and electrochemical properties of soot doped lead-based composite anodes
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    摘要:

    本文采用一种快速、低成本的方法制得纳米碳材料-碳烟颗粒(CH),并通过粉末冶金和机械合金化技术制备出铅/碳烟颗粒(Pb/CH)复合阳极材料,利用纳米碳材料高比表面积和高催化活性等优点,提高铅基阳极的析氧电催化性。使用场发射扫描电子显微镜(FE-SEM)、傅里叶红外光谱(FTIR)、循环伏安曲线(CV)和线性扫描伏安曲线(LSV)等测试进行表征。CH呈疏松的球链状,具有丰富的羰基和羟基功能团,是良好的电子和质子传递载体。随着CH含量增加, Pb/CH复合阳极的析氧超电位降低。Pb/1.5 wt.% CH复合阳极与纯Pb和传统Pb/0.75 wt.% Ag阳极相比,其表观交换电流密度分别提高3和2个数量级。在模拟锌电积条件下,其析氧电位低于铅银合金阳极20 mV,较纯铅阳极降低133 mV,具有优异的析氧电催化活性。

    Abstract:

    In this paper, a rapid and low-cost method was suggested to fabricate carbon nanomaterials-soot particles (CH), and lead/soot (Pb/CH) composite anode materials were prepared by powder metallurgy and mechanical alloying techniques. Oxygen evolution of lead-based anodes was improved due to high activated surface and catalytic activity of carbon nanomaterials. CH was characterized using field emission scanning electron microscopy (FE-SEM), Fourier infrared spectroscopy (FTIR), cyclic voltammetry curve (CV) and linear scanning voltammetry curve (LSV). CH shows a shape of many chains of nanosized with abundant carbonyl and hydroxyl groups as a excellent transfer carrier of electron and proton. The overpotential of composite anodes decreased with the conten of CHin lead/soot materials.The apparent exchange current density of the Pb/1.5 wt.% CH composite anode was increased by 3 and 2 orders of magnitude compared to the pure Pb and conventional Pb/0.75 wt.% Ag anodes, respectively. The oxygen evolving overpotential of Pb/1.5 wt.% CH composite anode was lower than that of the Pb/Ag anode and pure Pb anode by 20 mV and 133mV, respectively, under the simulated zinc electrowinning conditions, showing excellent electrocatalytic activity of oxygen evolution.

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张晨沛,杨长江,赵吕兴,李灿,李启坤,常军.碳烟颗粒掺杂铅基复合阳极的制备及电化学性能研究[J].稀有金属材料与工程,2024,53(2):483~489.[zhang chenpei, yang changjiang, Zhao Lvxing, Li Can, Li Qikun, Chang Jun. Preparation and electrochemical properties of soot doped lead-based composite anodes[J]. Rare Metal Materials and Engineering,2024,53(2):483~489.]
DOI:10.12442/j. issn.1002-185X.20230038

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历史
  • 收稿日期:2023-01-27
  • 最后修改日期:2023-02-22
  • 录用日期:2023-02-22
  • 在线发布日期: 2024-02-28
  • 出版日期: 2024-02-23