The structure evolution mechanism of electrodepo sited porous Ni films on NH4Cl concentration

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	The structure evolution mechanism of electrodepo sited porous Ni films on NH4Cl concentration
	Yu, Xiangtao 1; Wang, Mingyong 2; Wang, Zhi 2; Gong, Xuzhong 2; Guo, Zhancheng 1
刊名	APPLIED SURFACE SCIENCE
	2016
卷号	360 期号:JAN 页码:502-509
关键词	Electrodeposition Nickel films Hydrogen bubbles NH4Cl Porous structure
ISSN号	0169-4332
英文摘要	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.
WOS标题词	Science & Technology ; Physical Sciences ; Technology
类目[WOS]	Chemistry, Physical ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter
研究领域[WOS]	Chemistry ; Materials Science ; Physics
关键词[WOS]	LI-ION BATTERIES ; BUBBLE COALESCENCE ; COPPER FOAM ; NICKEL ELECTRODEPOSITION ; HYDROGEN CODEPOSITION ; EVOLVED HYDROGEN ; SURFACE PH ; CU FOAM ; MORPHOLOGY ; SUBSTRATE
收录类别	SCI
语种	英语
WOS记录号	WOS:000366592400009
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/20181]
专题	过程工程研究所_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
推荐引用方式 GB/T 7714	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.