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在LiCl-KCl-CeCl3熔鹽中鋁電極上欠電位沉積制備Al-Ce合金
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哈爾濱工程大學(xué),哈爾濱工程大學(xué),哈爾濱工程大學(xué),哈爾濱工程大學(xué),哈爾濱工程大學(xué),哈爾濱工程大學(xué),哈爾濱工程大學(xué)

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國家自然科學(xué)基金項(xiàng)目（面上項(xiàng)目，重點(diǎn)項(xiàng)目，重大項(xiàng)目）;中國博士后科學(xué)基金


Underpotential Deposition of Al-Ce Alloys at an Al electrode from LiCl-KCl-CeCl3 Melts
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Harbin Engineering University,Harbin Engineering University,Harbin Engineering University,Harbin Engineering University,Harbin Engineering University,Harbin Engineering University,Harbin Engineering University

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    摘要:

    在843K LiCl-KCl-CeCl3熔鹽中活性鋁電極上，研究了Ce(III)離子的電化學(xué)行為和欠電位沉積Al-Ce合金。對比循環(huán)伏安曲線發(fā)現(xiàn)，在Al電極上Ce(III)/Ce反應(yīng)的氧化還原電勢比在Mo惰性電極上更正；開路計(jì)時(shí)電位在金屬鋁和鈰的沉積平臺之間出現(xiàn)兩個(gè)平臺，這表明Ce(III)在Al活性電極上可以生成兩種金屬間化合物。以上結(jié)果在電化學(xué)機(jī)理上說明Ce(III)離子可以在Al電極上欠電位沉積形成金屬間化合物。在該實(shí)驗(yàn)條件下通過恒電位電解，在Al電極上得到了Al-Ce合金，驗(yàn)證了理論分析的結(jié)果。經(jīng)XRD表征，證實(shí)了形成AlCe和AlCe3兩種合金；經(jīng)SEM和EDS表征，證明了鈰分布在Al電極表面厚度均一的合金鍍層中（厚度28?m）。 關(guān)鍵詞：LiCl-KCl熔鹽；欠電位沉積；鋁電極；Al-Ce合金

    Abstract:

    Electrochemical behavior of Ce(III) and underpotential deposition of Al-Ce alloys were investigated at an Al active electrode in LiCl-KCl-CeCl3 melts. Compared with the cyclic voltammetry curves on a Mo electrode, the redox potential of Ce(III)/Ce at an Al electrode was more positive; there were two new plateaus between the deposition plateau of Al and Ce metal by circuit chronopotentiometry, which means forming two kinds of intermetallic compound. These results showed Ce(III) forming intermetallic compound due to underpotential deposition by electrochemical theory. Furthermore, these were confirmed by Al-Ce alloys, which were obtained at Al active electrode in LiCl-KCl-CeCl3 melts after potentiostatic deposition under the same condition. The formation of AlCe and AlCe3 were illuminated by X-ray diffraction (XRD). The analysis of scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS) showed that cerium exists at the surface of Al electrode to form a layer, which was about 28?m evenly coated the Al electrode.

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張萌,李云娜,韓偉,張密林,薛云,王艷力,高楊.在LiCl-KCl-CeCl3熔鹽中鋁電極上欠電位沉積制備Al-Ce合金[J].稀有金屬材料與工程,2016,45(8):1956~1960.[ZhangMeng, LiYunna, HanWei, ZhangMilin, XueYun, WangYanli, GaoYang. Underpotential Deposition of Al-Ce Alloys at an Al electrode from LiCl-KCl-CeCl3 Melts[J]. Rare Metal Materials and Engineering,2016,45(8):1956~1960.]
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  • 收稿日期:2014-06-10
  • 最后修改日期:2014-07-14
  • 錄用日期:2014-08-12
  • 在線發(fā)布日期: 2016-10-09
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