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001     908718
005     20240712112832.0
024 7 _ |a 2128/32399
|2 Handle
037 _ _ |a FZJ-2022-02787
041 _ _ |a English
100 1 _ |a Schatz, Michael
|0 P:(DE-Juel1)165598
|b 0
|e Corresponding author
|u fzj
111 2 _ |a 10th International Conference on "Fuel Science - From Production to Propulsion"
|c Aachen
|d 2022-05-10 - 2022-05-12
|w Germany
245 _ _ |a Revealing local pH gradients by in operando 13C MRI
260 _ _ |c 2022
336 7 _ |a Conference Paper
|0 33
|2 EndNote
336 7 _ |a INPROCEEDINGS
|2 BibTeX
336 7 _ |a conferenceObject
|2 DRIVER
336 7 _ |a CONFERENCE_POSTER
|2 ORCID
336 7 _ |a Output Types/Conference Poster
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336 7 _ |a Poster
|b poster
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|0 PUB:(DE-HGF)24
|s 1667798656_12977
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|x After Call
520 _ _ |a The study of local reaction conditions at catalytic surfaces in an operating cell is a challenging task. In particular, the CO2 electroreduction on copper is known to be highly sensitive to local changes of pH value and electrolyte concentration. We herewith present an in operando Nuclear Magnetic Resonance technique that enables spatially and temporally resolved determination of these values using the 13C resonances of the CO2/HCO3-/CO32- equilibrium. A phase-encoding pulse sequence using spin echoes enables chemical shift resolved imaging along one spatial dimension, i.e. the longitudinal axis of a NMR tube. Placing the copper working electrode perpendicular to this axis, 13C spectra are obtained as a function of distance to the electrode. The spectral data of the CO2 and the averaged carbonate (HCO3-/CO32-) resonances are used to determine local pH and concentrations. When a constant potential is applied, increasing pH values and decreasing electrolyte concentrations are observed as a result of the consumption of H+ and CO2 from the equilibrium with HCO3-. Moreover, the presented method offers wide-ranging applicability of materials, concentrations and potentials, and it can provide additional information on chemistry and mobility of reactants.
536 _ _ |a 1232 - Power-based Fuels and Chemicals (POF4-123)
|0 G:(DE-HGF)POF4-1232
|c POF4-123
|x 0
|f POF IV
536 _ _ |a DFG project 390919832 - EXC 2186: Das Fuel Science Center – Adaptive Umwandlungssysteme für erneuerbare Energie- und Kohlenstoffquellen (390919832)
|0 G:(GEPRIS)390919832
|c 390919832
|x 1
700 1 _ |a Jovanovic, Sven
|0 P:(DE-Juel1)169518
|b 1
|u fzj
700 1 _ |a Eichel, Rüdiger-A.
|0 P:(DE-Juel1)156123
|b 2
|u fzj
700 1 _ |a Granwehr, Josef
|0 P:(DE-Juel1)162401
|b 3
|u fzj
856 4 _ |u https://juser.fz-juelich.de/record/908718/files/Conference%20Poster.pdf
|y OpenAccess
909 C O |o oai:juser.fz-juelich.de:908718
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910 1 _ |a Forschungszentrum Jülich
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910 1 _ |a Forschungszentrum Jülich
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913 1 _ |a DE-HGF
|b Forschungsbereich Energie
|l Materialien und Technologien für die Energiewende (MTET)
|1 G:(DE-HGF)POF4-120
|0 G:(DE-HGF)POF4-123
|3 G:(DE-HGF)POF4
|2 G:(DE-HGF)POF4-100
|4 G:(DE-HGF)POF
|v Chemische Energieträger
|9 G:(DE-HGF)POF4-1232
|x 0
914 1 _ |y 2022
915 _ _ |a OpenAccess
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920 _ _ |l yes
920 1 _ |0 I:(DE-Juel1)IEK-9-20110218
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|l Grundlagen der Elektrochemie
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