A Solid-State Reference Electrode Based on a Self-Referencing Pulstrode

Gao, Wenyue1,2; Zdrachek, Elena1; Xie, Xiaojiang2; Bakker, Eric1

2019-12-19

10.1002/anie.201912651

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION   影响因子和分区

1433-7851

1521-3773

The design of solid-state reference electrodes without a liquid junction is important to allow miniature and cost-effective electrochemical sensors. To address this, a pulse control is proposed using an Ag/AgI element as reliable solid-state reference electrode. It involves the local release of iodide by a cathodic current that is immediately followed by an electromotive force (EMF) measurement that serves as the reference potential. The recapture of iodide ions is achieved by potentiostatic control. This results in intermittent potential values that are reproducible to less than one millivolt (SD=0.27 mV, n=50). The ionic strength is shown to influence the activity coefficient of released iodide in accordance with the extended Debye-Huckel equation, resulting in a predictable change of the potential reading. The principle is applied to potentiometric potassium detection with a valinomycin-based ion-selective electrode (ISE), demonstrating a completely solid-state sensor configuration.

electrochemical sensors potential pulstrode reference electrode silver iodide

SCI ; EI

英语

NI期刊

通讯

National Natural Science Foundation of China[21874063]

Chemistry

Chemistry, Multidisciplinary

WOS:000503331000001

WILEY-V C H VERLAG GMBH

20195207901388

Cost effectiveness ; Ion selective electrodes ; Ionic strength ; Silver halides ; Solid-state sensors

Control Instrumentation:732.2 ; Physical Chemistry:801.4 ; Chemical Plants and Equipment:802.1 ; Chemical Products Generally:804 ; Industrial Economics:911.2

CHEMISTRY

Web of Science

1.Univ Geneva, Dept Inorgan & Analyt Chem, Quai Ernest Ansermet 30, CH-1211 Geneva, Switzerland
2.Southern Univ Sci & Technol, Dept Chem, Shenzhen 518055, Guangdong, Peoples R China

Gao, Wenyue,Zdrachek, Elena,Xie, Xiaojiang,et al. A Solid-State Reference Electrode Based on a Self-Referencing Pulstrode[J]. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION,2019,59(6):2294-2298.

Gao, Wenyue,Zdrachek, Elena,Xie, Xiaojiang,&Bakker, Eric.(2019).A Solid-State Reference Electrode Based on a Self-Referencing Pulstrode.ANGEWANDTE CHEMIE-INTERNATIONAL EDITION,59(6),2294-2298.

Gao, Wenyue,et al."A Solid-State Reference Electrode Based on a Self-Referencing Pulstrode".ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 59.6(2019):2294-2298.