材料科学
阳极
腐蚀
钝化
扫描电子显微镜
电化学
渗氮
冶金
化学工程
拉曼光谱
析氧
图层(电子)
电极
化学
纳米技术
复合材料
物理化学
工程类
物理
光学
作者
Jitao Qin,Jie Li,Fangyang Liu,Zongliang Zhang,Liangxing Jiang
标识
DOI:10.1002/adsu.202400061
摘要
Abstract Dimensional Stable Anode (DSA) is a promising candidate for the electrodeposition of nonferrous metals. However, the industrial applications of DSA are limited due to the propensity of Ti substrate to easily undergo passivation. Theoretically analyses shows that TiMn 2 has better corrosion resistance in highly acidic and strongly polarized environments, making it an ideal middle‐layer for DSA anodes. To investigate the corrosion resistance of TiMn 2 , N‐doped TiMn 2 (N‐TiMn 2 ) is prepared by the high‐temperature nitriding method. The high charge transfer resistance ( R po ) of N‐TiMn 2 reduces the electron transfer ability of its surface and improves the chemical stability. Scanning electron microscopy, X‐ray diffraction, and Raman spectroscopy show that Ti/N‐TiMn 2 can better inhibit the oxidation of Ti during electrochemical corrosion while forming a more stable α‐MnO 2 film. The Ti/N‐TiMn 2 /MnO 2 anode is prepared, and the theoretical lifetime reaches 541.5 days in zinc electrodeposition simulation experiments. This middle layer provides a new idea for developing the oxygen evolution anode in the electrowinning of nonferrous metals.
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