Electrochemical quartz crystal microbalance (EQCM) is the combination of electrochemistry and quartz crystal microbalance, which was generated in the eighties.[1][2][3] Typically, an EQCM device contains an electrochemical cells part and a QCM part.[4] Two electrodes on both sides of the quartz crystal serve two purposes.[4] Firstly, an alternating electric field is generated between the two electrodes for making up the oscillator.[4] Secondly, the electrode contacting electrolyte is used as a working electrode (WE), together with a counter electrode (CE) and a reference electrode (RE), in the potentiostatic circuit constituting the electrochemistry cell.[4] Thus, the working electrode of electrochemistry cell is the sensor of QCM.[2]
As a high mass sensitive in-situ measurement, EQCM is suitable to monitor the dynamic response of reactions at the electrode–solution interface at the applied potential.[5] When the potential of a QCM metal electrode changes, a negative or positive mass change is monitored depending on the ratio of anions adoption on the electrode surface and the dissolution of metal ions into solution.[5]
^Schumacher, R.; Borges, G.; Kanazawa, K.K. (November 1985). "The quartz microbalance: A sensitive tool to probe surface reconstructions on gold electrodes in liquid". Surface Science Letters. 163 (1): L621–L626. Bibcode:1985SurSL.163L.621S. doi:10.1016/0167-2584(85)90839-4. ISSN 0167-2584.
^ abBruckenstein, Stanley; Shay, Michael (June 1985). "An in situ weighing study of the mechanism for the formation of the adsorbed oxygen monolayer at a gold electrode". Journal of Electroanalytical Chemistry and Interfacial Electrochemistry. 188 (1–2): 131–136. doi:10.1016/s0022-0728(85)80057-7. ISSN 0022-0728.
^Kanazawa, K. Keiji.; Gordon, Joseph G. (July 1985). "Frequency of a quartz microbalance in contact with liquid". Analytical Chemistry. 57 (8): 1770–1771. doi:10.1021/ac00285a062. ISSN 0003-2700.
^ abcdStreinz, Christopher C. (1995). "The Effect of Current and Nickel Nitrate Concentration on the Deposition of Nickel Hydroxide Films". Journal of the Electrochemical Society. 142 (4): 1084–1089. Bibcode:1995JElS..142.1084S. doi:10.1149/1.2044134. ISSN 0013-4651. S2CID 52106125.
^ abSchmutz, P.; Landolt, D. (December 1999). "Electrochemical quartz crystal microbalance study of the transient response of passive Fe–25Cr alloy". Electrochimica Acta. 45 (6): 899–911. doi:10.1016/s0013-4686(99)00293-5. ISSN 0013-4686.
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