| Full text | |
| Author(s): |
Benders, Stefan
[1]
;
Gomes, Bruna Ferreira
[2, 3]
;
Carmo, Marcelo
[4]
;
Colnago, Luiz Alberto
[5]
;
Bluemich, Bernhard
[1]
Total Authors: 5
|
| Affiliation: | [1] Rhein Westfal TH Aachen, Inst Tech & Makromol Chem, Worringerweg 2, D-52064 Aachen - Germany
[2] Univ Sao Paulo, Inst Quim Sao Carlos, Av Trab Sao Carlense 400, Parque Arnold Schimidt, BR-13566590 Sao Carlos, SP - Brazil
[3] Univ Bayreuth, Fak Ingenieurwissensch, Lehrstuhl Werkstoffverfahrenstech, D-95447 Bayreuth - Germany
[4] Forschungszentrum Julich, Wilhelm Johnen Str, D-52428 Julich - Germany
[5] Embrapa Instrumentacao, Rua 15 Novembro, 1452 Ctr, BR-13560970 Sao Carlos, SP - Brazil
Total Affiliations: 5
|
| Document type: | Journal article |
| Source: | JOURNAL OF MAGNETIC RESONANCE; v. 312, MAR 2020. |
| Web of Science Citations: | 0 |
| Abstract | |
Electrochemical reactions have become increasingly important in a large number of processes and applications. The use of NMR (Nuclear Magnetic Resonance) techniques to follow in situ electrochemistry processes has been gaining increasing attention from the scientific community because they allow the identification and quantification of the products and reagents, whereas electrochemistry measurements alone are not able to do so. However, when an electrochemical reaction is performed in situ the reaction rate can be increased by action of the Lorentz force, which is equal to the cross product between the current density and the magnetic field applied. This phenomenon is called the magnetohydrodynamic (MHD) effect. Although this process is beneficial because it accelerates the reaction, it needs to be well understood and taken into account during the in situ electrochemical measurements. The MHD effect is based on increased mass transfer, which is shown by in situ MRI velocimetry here. Images had to be acquired in a rapid manner since current was not pulsed. Significant velocities in a plane parallel to the electrodes alongside with complex flow patterns were detected. (C) 2020 Elsevier Inc. All rights reserved. (AU) | |
| FAPESP's process: | 12/22281-9 - NMR study of the magneto-convective phenomenon on paramagnetic ions during electrodeposition |
| Grantee: | Bruna Ferreira Gomes Lobo |
| Support Opportunities: | Scholarships in Brazil - Doctorate (Direct) |
| FAPESP's process: | 17/12864-0 - Effect of NMR magnetic field in chemical reactions monitored NMR in situ |
| Grantee: | Luiz Alberto Colnago |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 16/01537-6 - Study of the coupling between electrochemistry and low-field, mid-resolution NMR for the in situ and on line analysis of redox reactions of organic compounds and the evaluation of the magnetic field effect on the velocity of the in situ reactions |
| Grantee: | Bruna Ferreira Gomes Lobo |
| Support Opportunities: | Scholarships abroad - Research Internship - Doctorate (Direct) |