Electrodeposition of PtZn in a Lewis acidic ZnCl2-1-ethyl-3-methylimidazolium chloride ionic liquid

被引:32
作者
Huang, JF [1 ]
Sun, IW [1 ]
机构
[1] Natl Cheng Kung Univ, Dept Chem, Tainan 70101, Taiwan
关键词
electrodeposition; PtZn; ionic liquid; alloy; imidazolium chloride;
D O I
10.1016/j.electacta.2004.02.039
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
The electrodeposition of PtZn from a Lewis acidic 40-60 mol% zinc chloride-1-ethyl-3-methylimidazolium chloride ionic liquid containing PtCl2 was investigated at polycrystalline tungsten substrates at 90degreesC. Cyclic voltammetric data indicates that Pt(II) was reduced at a potential slightly more positive than Zn(II) was. The Pt-Zn electrodeposits exhibited multiple anodic stripping waves. The Zn-dominant deposits were stripped at a potential less positive than that of the Pt-dominant deposits. Energy-dispersive spectroscopy and scanning electron microscopy data indicated that the composition and morphology of the electrodeposited Pt-Zn alloys were affected by the deposition potential and the Pt(II) concentration in the plating solution. The electrodeposition of Zn at a Pt substrate also produced surface Pt-Zn alloys. The Pt of the electrochemically prepared Pt-Zn alloys was easier to oxidize than the bulk Pt substrate. (C) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码:3251 / 3258
页数:8
相关论文
共 27 条
[1]   Preparation of novel, moisture-stable, Lewis-acidic ionic liquids containing quaternary ammonium salts with functional side chains [J].
Abbott, AP ;
Capper, G ;
Davies, DL ;
Munro, HL ;
Rasheed, RK ;
Tambyrajah, V .
CHEMICAL COMMUNICATIONS, 2001, (19) :2010-2011
[2]   Novel ambient temperature ionic liquids for zinc and zinc alloy electrodeposition [J].
Abbott, AP ;
Capper, G ;
Davies, DL ;
Rasheed, RK ;
Tambyrajah, V .
TRANSACTIONS OF THE INSTITUTE OF METAL FINISHING, 2001, 79 (06) :204-206
[3]  
ANDRES F, 2003, ANGEW CHEM INT EDIT, V42, P3428
[4]   ALLOWED QUARTZ-ULTRAVIOLET TRANSITIONS OF TETRACHLORO COMPLEXES OF PLATINUM(II) AND PALLADIUM(II) [J].
ANEX, BG ;
TAKEUCHI, N .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1974, 96 (14) :4411-4416
[5]   Electrodeposition of cobalt and zinc-cobalt alloys from a lewis acidic zinc chloride-1-ethyl-3 methylimidazolium chloride molten salt [J].
Chen, PY ;
Sun, IW .
ELECTROCHIMICA ACTA, 2001, 46 (08) :1169-1177
[6]   Electrodeposition of Cu-Zn alloy from a Lewis acidic ZnCl2-EMIC molten salt [J].
Chen, PY ;
Lin, MC ;
Sun, IW .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2000, 147 (09) :3350-3355
[7]   SELECTIVITY IN CATALYSIS BY ALLOYS [J].
CLARKE, JKA .
CHEMICAL REVIEWS, 1975, 75 (03) :291-305
[8]   High performances of Pt/ZnO catalysts in selective hydrogenation of crotonaldehyde [J].
Consonni, M ;
Jokic, D ;
Murzin, DY ;
Touroude, R .
JOURNAL OF CATALYSIS, 1999, 188 (01) :165-175
[9]   Electrocatalysis in direct methanol fuel cells: in-situ probing of PtRu anode catalyst surfaces [J].
Dinh, HN ;
Ren, XM ;
Garzon, FH ;
Zelenay, P ;
Gottesfeld, S .
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 2000, 491 (1-2) :222-233
[10]   Electrocatalytic oxidation of small carbohydrate fuels at Pt-Sn modified electrodes [J].
González, MJ ;
Hable, CT ;
Wrighton, MS .
JOURNAL OF PHYSICAL CHEMISTRY B, 1998, 102 (49) :9881-9890