ELECTROCHEMICAL-BEHAVIOR OF COPPER ELECTRODE IN CONCENTRATED SULFURIC-ACID-SOLUTIONS

被引：76

作者：

MOREIRA, AH

BENEDETTI, AV

CABOT, PL

SUMODJO, PTA

机构：

[1] UNIV BARCELONA,DEPT QUIM FIS,E-08028 BARCELONA,SPAIN

[2] UNIV SAO PAULO,INST QUIM,BR-01498 SAO PAULO,BRAZIL

来源：

ELECTROCHIMICA ACTA | 1993年 / 38卷 / 07期

关键词：

COPPER; SULFURIC ACID; POTENTIODYNAMIC STUDIES; CYCLIC VOLTAMMETRY; DISSOLUTION PRECIPITATION PROCESS;

D O I：

10.1016/0013-4686(93)87018-9

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The electrochemical behaviour of copper in 6.0 mol l-1 sulfuric acid at 30-degrees-C, was studied by means of the potentiodynamic method. At low potential sweep rates, v < 200 mV s-1, the data reveal that the anodic process is basically constituted of copper dissolution and a film formation which inhibits further metal oxidation and which may undergo further dissolution. For higher potential sweep rates, a modification in the passivation region of the voltammogram is observed. It can be ascribed to a change in the passivation mechanism which possibly involves different surface species. The kinetic relationships derived from the potentiodynamic I/E curves obtained at low v suggest a film formation via a dissolution/precipitation mechanism.

引用

页码：981 / 987

页数：7

共 33 条

[11]

ELIAS ML, 1981, METAL PROGR JUN, P36

[12]

HALEEM SAM, 1981, J ELECTROANAL CHEM, V117, P309

[13] OXIDATIONS AT COPPER ELECTRODES .2. STUDY OF POLYCRYSTALLINE COPPER IN ALKALI BY LINEAR SWEEP VOLTAMMETRY [J].

HAMPSON, NA ;

LEE, JB ;

MACDONALD, KI .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1971, 32 (02) :165-+

[14]

Hedges ES, 1926, J CHEM SOC, P1533

[15] THE ANODIC BEHAVIOUR OF METALS .5. COPPER [J].

HICKLING, A ;

TAYLOR, D .

TRANSACTIONS OF THE FARADAY SOCIETY, 1948, 44 (04) :262-&

[16]

Hoar T.P., 1963, J ELECTROCHEM SOC, V110, P614, DOI [10.1149/1.2425839, DOI 10.1149/1.2425839]

[17] ON KINETICS OF CU-CUAQ++ ELECTRODE [J].

HURLEN, T .

ACTA CHEMICA SCANDINAVICA, 1961, 15 (03) :630-&

[18] STOICHIOMETRY OF ANODIC COPPER DISSOLUTION AT HIGH CURRENT DENSITIES [J].

KINOSHITA, K ;

LANDOLT, D ;

MULLER, RH ;

TOBIAS, CW .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1970, 117 (10) :1246-+

[19]

KISS L, 1981, ACTA CHIM HUNG, V108, P369

[20]

KISS L, 1970, ACTA CHIM HUNG, V66, P395

← 1 2 3 4 →