Automated Redox Titrations via Interdigitated Electrode Arrays
same cell
NMR
Joaquin Rodriguez-Lopez
2026-08-13 14:27
Automated Redox Titrations via Interdigitated Electrode Arrays
same cell
FEM
Joaquin Rodriguez-Lopez
2026-08-13 14:27
Automated Redox Titrations via Interdigitated Electrode Arrays
same cell
Experiment Metadata
Visibility
public
Electrolyte
PPy ART: 0.2 mM Ruhex in 0.1 M or 0.5 M KCl (aqueous); PTAP ART: 0.5 mM Fc in MeCN with 0.1 M LiClO₄; PPy deposition: 10 mM pyrrole in MeCN with 0.1 M TBAPF₆; PTAP deposition: 1 mM PTO-2NO₂ in MeCN with 0.1 M LiClO₄; Electrode cleaning: 0.1 M PBS (pH 7.4) with 0.1 M KNO₃
Active Material
PPy (polypyrrole, electrodeposited on WE 1) + Ru(NH₃)₆³⁺/²⁺ (Ruhex) redox mediator; PTAP (pyrene-4,5,9,10-tetrone azo polymer, electrodeposited on WE 1) + ferrocene (Fc/Fc⁺) redox mediator
Publication Doi
10.1021/acsmeasuresciau.5c00128
Concentration Mm
0.2
Institution Code
ESRA
Potential Window
PPy: charging 0.3–0.6 V vs Ag/AgCl; titration CV −0.4 to 0.2 V vs Ag/AgCl; PPy electrodeposition: 0 to 1.3 V vs Ag/AgCl; PTAP: charging −1.1 to −2.0 V vs Fc/Fc⁺; electrodeposition −3.0 to 0 V vs Fc/Fc⁺
Measurement Technique
utomated redox titration (ART): (1) baseline CV on WE 2 array; (2) chronoamperometric charging of WE 1 (30 s); (3) titration + post-titration CVs on WE 2 array; (4) baseline subtraction and charge integration; controlled via bipotentiostat + Python (Hard Potato library) + Arduino multiplexer
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