Insights into electrodeposition process of nickel from ammonium chloride media with speciation analysis and in situ synchrotron radiation X-ray imaging
Song, YX; Tang, J; Hu, JG; Liu, SJ; Fu, YA; Ji, XB; Hu, JG (reprint author), Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.
2016
发表期刊ELECTROCHIMICA ACTA
ISSN0013-4686
卷号210页码:812-820
文章类型期刊论文
摘要The electrodeposition processes of nickel in ammonium chloride media were studied in combination of speciation analysis and in situ synchrotron radiation X-ray imaging. The X-ray absorption spectra indicated that the nickel(II) species present an octahedral configuration independent on aqueous pH. The UV-vis spectra and fraction-pH diagram showed that the dominant species is Ni(H2O)(6)(2+), Ni (NH3)(m)(H2O)(6) (2+)(m)(m = 2, 3 and 4) and Ni(NH3)(6)(2+) in the electrolytes of pH 3, 7.5 and 10, respectively, and chloride ions are not bonded to the inner coordination sphere of nickel species. The electrochemical behaviors and nucleation mechanism of nickel(II) species are dependent on the solution pH and species. The deposited nickel morphology and bubble evolution at the interface of electrode/electrolyte were clearly elucidated by the X-ray real-time images. The results indicate that the inner coordination sphere of nickel species can induce the morphology, growth and adherence processes of the deposited nickel. The competition process between nickel reduction and hydrogen evolution has also been discussed at the different applied potentials. The mixed coordination species and the higher applied potentials are beneficial for the formation of the well-adhered and dense nickel deposits. (C) 2016 Elsevier Ltd. All rights reserved.
关键词Nickel Electrodeposition Ammonium Chloride In Situ X-ray imagIng Interfacial Process Inner Coordination Sphere
DOI10.1016/j.electacta.2016.06.033
收录类别SCI
语种英语
WOS记录号WOS:000380746100096
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/26544
专题中科院上海应用物理研究所2011-2018年
通讯作者Hu, JG (reprint author), Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.
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Song, YX,Tang, J,Hu, JG,et al. Insights into electrodeposition process of nickel from ammonium chloride media with speciation analysis and in situ synchrotron radiation X-ray imaging[J]. ELECTROCHIMICA ACTA,2016,210:812-820.
APA Song, YX.,Tang, J.,Hu, JG.,Liu, SJ.,Fu, YA.,...&Hu, JG .(2016).Insights into electrodeposition process of nickel from ammonium chloride media with speciation analysis and in situ synchrotron radiation X-ray imaging.ELECTROCHIMICA ACTA,210,812-820.
MLA Song, YX,et al."Insights into electrodeposition process of nickel from ammonium chloride media with speciation analysis and in situ synchrotron radiation X-ray imaging".ELECTROCHIMICA ACTA 210(2016):812-820.
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