An Integrated Dual Ultramicroelectrode with Lower Solution Resistance Applied in Ultrafast Cyclic Voltammetry

Abstract

A method for calculating the solution resistance of an integrated dual ultramicroelectrode was introduced, and then tested by experiments using dummy cells. Then, with the reduction of anthracene on a gold ultramicroelectrode in a 0.1 M tetraethylammonium tetrafluoroborate/acetonitrile solution as the test system, it could be found that the solution resistance of this integrated dual ultramicroelectrode was much lower than that of the two-electrode system conventionally used. Thus, the compensation level could be improved up to nearly 100% at a scan rate of 1.34 MV s -1 , while the latter could not. This showed that the integrated dual ultramicroelectrode was more suitable for acting as the electrode system in ultrafast cyclic voltammetry, especially in a high-resistance solution.

Correlations between electrochemical behaviors and DNA photooxidative properties of non-steroïdal anti-inflammatory drugs and their photoproducts

“…BP ÅÀ , the reduction processes for KP and TP can be attributed to this same C@O function. For NP, the reduction peak observed corresponds to naphthalene moiety reduction, in agreement with the literature [32][33][34].…”

Dynamically Interfacial pH‐Buffering Effect Enabled by N ‐Methylimidazole Molecules as Spontaneous Proton Pumps toward Highly Reversible Zinc‐Metal Anodes

“…[ 27 ] Besides, the integrated strategy of Ag/AgCl reference electrode and W/WO 3 pH‐detecting electrode can effectively reduce the interference of solution resistance and electric field. [ 28 ] As a conductive metal substrate, Zn foil has a positive feedback effect on the oxidation of ferrocene methanol (FcMeOH) under diffusion‐limited conditions. [ 29 ] As shown in Figure 4d, the closer the Pt UME approaches the substrate, the higher the oxidation current is, which is attributed to the catalysis of substrate on the FcMeOH transformation from oxidation state to reduction state.…”

Nanoscale Electrochemistry

“…An intrinsic electrochemical benefit of a smaller electrode is the decrease of the electrical double layer capacitance, C dl , which decreases as electrode area decreases. This results in a dramatically decreased time constant, R s C dl , allowing experiments to be done on nanosecond time scales. , Wightman first demonstrated the use of carbon UMEs to run cyclic voltammetry experiments at 10 5 V/s. , Amatore , and others , have reported the use of scan rates up to 10 6 V/s with specially designed potentiostats and UMEs. With such small electrodes, electrochemical measurements can be carried out in the nanosecond time domain, enabling the direct study of ultrafast electrochemical kinetics and detection of short-lived intermediate species.…”