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电化学  2014 

Au(111)-离子液体界面层状结构与温度关联的原位AFM力曲线研究

DOI: 10.13208/j.electrochem.130892, PP. 295-301

Keywords: 电化学界面,离子液体,Au(111),双电层,层状结构,AFM力曲线,温度影响

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Abstract:

本文针对BMIPF6和OMIPF6两种离子液体,在电极表面远离零电荷电位且以负电荷表面电位下,运用AFM力曲线详细地研究了其与Au(111)单晶电极界面所形成的层状结构与温度的关联.在15~40oC的温度范围内,温度越低其离子液体层状结构越稳定.温度对OMIPF6离子液体层状结构的稳定性和数目的影响较BMIPF6缓和:温度变化5oC,OMIPF6靠近表面第一层层状结构的力值变化仅为1~2nN,而BMIPF6第一层层状结构的力值变化为3~5nN;较低温下,BMIPF6中层状结构的数目有所增加,而OMIPF6的层状数目始终保持两层,且随温度的变化并不敏感.这可归因于两种离子液体的阳离子尺寸以及与电极表面的作用方式和强度不同;同时,OMIPF6较粘稠,其热运动受温度的影响不甚敏感.

References

[1]  Wilkes J S. A short history of ionic liquids—From molten salts to neoteric solvents[J]. Green Chemistry, 2002, 4(2): 73-80.
[2]  Wilkes J S, Zaworotko M J. Air and water stable 1-ethyl-3-methylimidazolium based ionic liquids[J]. Chemical Communications, 1992, (13):965-967.
[3]  Buzzeo M C, Evans R G, Compton R G. Non-haloaluminate room-temperature ionic liquids in electrochemistry—A review[J]. ChemPhysChem, 2004, 5(8): 1106-1120.
[4]  Galinski M, Lewandowski A, Stepniak I. Ionic liquids as electrolytes[J]. Electrochimica Acta, 2006, 51(26): 5567-5580.
[5]  Lewandowski A, Swiderska-Mocek A. Ionic liquids as electrolytes for Li-ion batteries—An overview of electrochemical studies[J]. Journal of Power Sources, 2009, 194(2): 601-609.
[6]  Liu H, Liu Y, Li J. Ionic liquids in surface electrochemistry[J]. Physical Chemistry Chemical Physics, 2010, 12(8): 1685-1697.
[7]  Su Y Z, Fu Y C, Wei Y M, et al. Electrode-ionic liquid interface: Electric double layer and metal electrodeposition[J]. ChemPhysChem, 2010,11(13): 2764-2778.
[8]  Welton T. Room-temperature ionic liquids. Solvents for synthesis and catalysis[J]. Chemical Review, 1999, 99(8): 2071-2083.
[9]  Weing?rtner H. Understanding ionic liquids at the molecular level: Facts, problems, and controversies[J]. Angewandte Chemie International Edition, 2008, 47(4): 654-670.
[10]  Kornyshev A A. Double-layer in ionic liquids: Paradigm change?[J]. Journal of Physical Chemistry B, 2007, 111(20): 5545-5557.
[11]  Castner E W (Jr), Wishart J F. Spotlight on ionic liquids[J]. Journal of Chemical Physics, 2010, 132(12): 120901.
[12]  Castner E W (Jr), Margulis C J, Maroncelli M, et al. Ionic liquids: Structure and photochemical reactions[J]. Annual Review of Physical Chemistry, 2011, 62: 85-105.
[13]  Liu Y D, Zhang Y, Wu G Z, et al. Coexistence of liquid and solid phases of Bmim-PF6 ionic liquid on mica surfaces at room temperature[J]. Journal of the Americal Chemical Society, 2006, 128(23): 7456-7457.
[14]  Mezger M, Schroder H, Reichert H, et al. Molecular layering of fluorinated ionic liquids at a charged sapphire (0001) surface[J]. Science, 2008, 322(5900):424-428.
[15]  Atkin R, Warr G G. Structure in confined room-temperature ionic liquids[J]. Journal of Physical Chemistry C, 2007, 111(13): 5162-5168.
[16]  Perkin S, Crowhurst L, Niedermeyer H, et al. Self-assembly in the electrical double layer of ionic liquids[J]. Chemical Communications, 2011, 47(23): 6572-6574.
[17]  Zhang X, Zhong Y X, Yan J W, et al. Probing double layer structures of Au (111)-BMIPF6 ionic liquid interfaces from potential-dependent AFM force curves[J]. Chemical Communications, 2012,48(4): 582-584.
[18]  Su Y Z, Fu Y C, Yan J W, et al. Double Layer of Au(100)-ionic liquid interface and its stability in imidazolium-based ionic liquids[J]. Angewandte Chemie International Edition, 2009, 48(28): 5148-5151.
[19]  Su Y Z, Yan J W, Li M G, et al. Electric Double Layer of Au(100)/imidazolium-based ionic liquids interface: Effect of cation size[J]. Journal of Physical Chemistry C, 2013, 117(1): 205-212.
[20]  Bhushan B, Marti O. Scanning probe microscopy—Principle of operation, instrumentation, and probes[M]//Bhushan B. Nanotribology and nanomechanics. Heidelberg: Springer, 2005: 41-115.
[21]  Hayes R, Borisenko N, Tam M K, et al. Double layer structure of ionic liquids at the Au(111) electrode interface: an atomic force microscopy investigation[J]. Journal of Physical Chemistry C, 2011, 115(14): 6855-6863.
[22]  Perkin S, Albrecht T, Klein J. Layering and shear properties of an ionic liquid,1-ethyl-3-methylimidazolium ethylsulfate, confined to nano-films between mica surfaces[J]. Physical chemistry chemical physics, 2010, 12(6): 1243-1247.
[23]  Wakeham D, Hayes R, Warr G G, et al. Influence of temperature and molecular structure on ionic liquid solvation layers[J]. Journal of Physical Chemistry B, 2009, 113(17): 5961-5966.

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