Dependence of the reliability of electrochemical quartz-crystal nanobalance mass responses on the calibration constant, Cf:: analysis of three procedures for its determination

被引:74
作者
Vatankhah, G
Lessard, J
Jerkiewicz, G [1 ]
Zolfaghari, A
Conway, BE
机构
[1] Queens Univ, Dept Chem, Kingston, ON K7L 3N6, Canada
[2] Univ Sherbrooke, Dept Chim, Sherbrooke, PQ J1K 2R1, Canada
[3] Univ Ottawa, Dept Chem, Ottawa, ON K1N 6N5, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
EQCN; calibration constant; silver electrodeposition; cyclic voltammetry; chronopotentiometry; chronoamperometry;
D O I
10.1016/S0013-4686(03)00083-5
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
The acquisition of accurate results in use of the electrochemical quartz-crystal nanobalance (EQCN) for surface-electrochemical studies depends on reliability of the value of the calibration constant relating changes of the crystal oscillator frequency to the specific surface mass change resulting from some chemisorption or electrosorption process. Three electrochemical methods are employed comparatively to determine the calibration constant for use of an EQCN. In the, present paper, study of electrodeposition/ electrodissolution of silver on Pt(poly) electrode surfaces provides a means of determining values of the calibration constant for the EQCN response using cyclic voltammetry, chronopotentiometry and chronoamperometry. The experimentally determined value of the calibration constant (C-f) is found to depend on the electrochemical methodology and technique used for its measurement as well as the thickness of the Ag deposit. Use of these three complementary procedures applied, under well-defined conditions provides a basis for adoption of a preferred and reliable procedure for determination of the calibration constant; the resulting mean value is precise and very reproducible. (C) 2003 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:1613 / 1622
页数:10
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