電化學石英晶體微天平之原理及應用

The Principle and Application of Electrochemical Quartz Crystal Microbala

鄭宗記(Tzong-Jih Cheng) ； 李昆峰(Kun-Feng Lee) ； 張憲彰(Hsien-Chang Chang)

《化學》 59卷2期 (2001/06) Pp. 219-233

https://doi.org/10.6623/chem.2001027

摘要

隨著壓電元件之開發，其晶面上負荷感應式(loading-sensitive)石英晶體徵天平(QCM)法因應而生，非但在氣相中且在液相中的重量或黏滯度之微量改變，均可藉此法並配合適當的量測體系而能為功；其次，液相中的QCM體系若再結合電化學量測體系，構成所謂的電化學石英晶體微天平(EQCM)，即可在擷取因電化學反應所造成電極界面上的電流信號之同時，更可觀測電極界面上組成與微結構的改變引發晶體振盪頻率變化。如此，因電化學條件的施加，可隨時間同步取得頻率與電流兩方面的信號量之增減現象，有利於in situ反應場中變化的判知。本文中，我們將就EQCM之原理與電路，以及其應用，包括電催化、腐蝕、電池、電析及感測等方面之相關研究，作一番整體性的回顧與整理。

關鍵字

電化學反應 ； 石英壓電晶體微天平 ； 壓電振盪器 ； 電化學石英晶體微天平

並列摘要

Quartz crystal microbalance (QCM) is a loading-sensitive piezoelectric device on which can be used as in situ technique to measure mass or visco-elasticity changes at the electrode surfaces. Moreover, this system has been also combined with an electrochemical instrument resulting in a new tool so-called electrochemical quartz crystal microbalance (EQCM). The two electrodes of QCM probe were provided with an alternating electric field that drives the oscillation of the crystal, however, only one of it touched to the solution and served as the working electrode. Namely, it is possible to simultaneously acquire the faradic current companying with frequency response under an electrochemical condition, so that the occurrence of redox reaction may be further elucidated. This report reviews the principle, construction and development of EQCM. The application of electrocatalysis, corrosion, batteries, sensing technology and electro-deposition etc. are described.

並列關鍵字

electrochemistry ； quartz crystal microbalance ； piezoelectric oscillating crystal ； EQCM