The structure evolution mechanism of electrodepo sited porous Ni films on NH4Cl concentration
Yu, Xiangtao1; Wang, Mingyong2; Wang, Zhi2; Gong, Xuzhong2; Guo, Zhancheng1
2016
发表期刊APPLIED SURFACE SCIENCE
ISSN0169-4332
卷号360期号:JAN页码:502-509
摘要NH4Cl was an important component for the electrodeposition of porous metal films through hydrogen bubble template approach. The effects of NH4Cl concentrations on pore formation and structure evolution of the electrodeposited porous Ni films were studied. It was found that Ni films electrodeposited from solutions with 0.25-0.35M NH4Cl were compact. When NH4Cl concentrations were 0.4-0.75M and 0.85-3M, porous Ni films with dish-like and honeycomb-like pores were electrodeposited, respectively. To form porous structure, the critical amounts of Ni in mass deposited onto the electrode must be achieved. However, at lower NH4Cl concentration, Ni electrodeposition was interrupted after about 15s due to Ni2+ hydrolysis. The critical amounts of Ni in mass were not reached, and compact Ni films were obtained. When NH4Cl concentrations exceeded 0.4 M, Ni2+ hydrolysis was inhibited due to the enhanced buffer ability of solution and Ni(NH3)(n)(2+) (2 <= n <= 6) complexes became the discharged ions. Ni electrodeposition proceeded continuously and reached the critical amounts of Ni in mass, and porous Ni films were formed. At higher NH4Cl concentration, hydrogen was produced mainly by the electrochemical reduction of NH4+. pH near cathode was hardly changed, and Ni2+ ions with low overpotential were reduced. The rough Ni films were formed, which led to smaller break-off diameter of bubbles. Therefore, the pore sizes of Ni films were decreased. (C) 2015 Published by Elsevier B.V.
关键词Electrodeposition Nickel Films Hydrogen Bubbles Nh4cl Porous Structure
文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
DOI10.1016/j.apsusc.2015.10.174
收录类别SCI
语种英语
关键词[WOS]LI-ION BATTERIES ; BUBBLE COALESCENCE ; COPPER FOAM ; NICKEL ELECTRODEPOSITION ; HYDROGEN CODEPOSITION ; EVOLVED HYDROGEN ; SURFACE PH ; CU FOAM ; MORPHOLOGY ; SUBSTRATE
WOS研究方向Chemistry ; Materials Science ; Physics
WOS类目Chemistry, Physical ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter
项目资助者Natural Science Foundation of China(51274180 ; Youth Innovation Promotion Association, CAS(2015036) ; 50804043)
WOS记录号WOS:000366592400009
引用统计
被引频次:14[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/20181
专题湿法冶金清洁生产技术国家工程实验室
作者单位1.Univ Sci & Technol Beijing, State Key Lab Adv Met, Beijing 100083, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
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Yu, Xiangtao,Wang, Mingyong,Wang, Zhi,et al. The structure evolution mechanism of electrodepo sited porous Ni films on NH4Cl concentration[J]. APPLIED SURFACE SCIENCE,2016,360(JAN):502-509.
APA Yu, Xiangtao,Wang, Mingyong,Wang, Zhi,Gong, Xuzhong,&Guo, Zhancheng.(2016).The structure evolution mechanism of electrodepo sited porous Ni films on NH4Cl concentration.APPLIED SURFACE SCIENCE,360(JAN),502-509.
MLA Yu, Xiangtao,et al."The structure evolution mechanism of electrodepo sited porous Ni films on NH4Cl concentration".APPLIED SURFACE SCIENCE 360.JAN(2016):502-509.
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