Improving in operando low field NMR copper electrodeposition analyses using inductively coupled coils

• Published in: Electrochimica acta Vol. 298; pp. 844 - 851
• Main Authors: Lobo, Carlos M.S., Gomes, Bruna F., Bouzouma, Hajar, Danieli, Ernesto, Blümich, Bernhard, Colnago, Luiz A.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.03.2019; Elsevier BV
• Subjects: Coils; Copper; Coupling (molecular); Cu2+concentration monitoring; Electrochemistry; Electrochemistry-NMR in operando coupling; Electrodeposition; Inductive coupling; Low field NMR; Monitoring; NMR; NMR probe; Nuclear magnetic resonance; Reaction intermediates; Reagents; Low field NMR; Inductive coupling; Electrochemistry-NMR in operando coupling; NMR probe; Cu2+concentration monitoring
• ISSN: 0013-4686; 1873-3859
• DOI: 10.1016/j.electacta.2018.12.076

To unveil the reaction pathway in electrochemical systems, knowledge of the reaction intermediates and the concentrations of reagents and products would be very useful. Nuclear magnetic resonance (NMR) is the most popular technique for elucidating molecular structures and is well suited for in situ coupling with electrochemistry. In this work we explore how to improve the sensitivity of NMR for monitoring electrochemical processes in situ with the help of inductively coupled coils. We show that a secondary coil in the NMR probe is beneficial for monitoring the change in the 1H T2 values during the electrodeposition reaction of Cu2+, which are closely related to the concentration of Cu2+ in the solution. •Cu2+ concentration was monitored by low field NMR during electrodeposition.•Inductively coupled coils can be used to enhance signal to noise ratio of the NMR experiments.•The reaction can be monitored in a small volume electrochemical cell (less than 500 μL).•The secondary coil can be used without changing the standard probe coil.