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- Title
Ultrawide Hydrazine Concentration Monitoring Sensor Comprising Ir−Ni Nanoparticles Decorated with Multi‐Walled Carbon Nanotubes in On‐Site Alkaline Fuel Cell Operation.
- Authors
Nde, Dieudonne Tanue; Park, Jihyeon; Lee, Sang Hyuk; Lee, Jaeyoung; Lee, Hye Jin
- Abstract
A highly sensitive amperometric hydrazine monitoring sensor offering an ultrawide dynamic range of 5 μM to 1 M in alkaline media (e. g., 1 M KOH) was developed via co‐electrodepositing iridium‐nickel alloy nanoparticles (NPs) functionalized with multi‐walled carbon nanotubes (Ir−Ni−MWCNTs) on a disposable screen‐printed carbon electrode. The synergistic interaction of MWCNTs with Ir−Ni alloy NPs resulted in enlarged active surface area, rapid electron transfer, and alkaline media stability with an onset potential of −0.12 V (vs. Ag/AgCl) toward hydrazine oxidation. A limit of detection for hydrazine was 0.81 μM with guaranteed reproducibility, repeatability, and storage stability alongside a superb selectivity toward ethanolamine, urea, dopamine, NaBH4, NH4OH, NaNO2, and Na2CO3. The sensor was finally applied to on‐site monitoring of the carbon‐free hydrazine concentration at the anode and cathode of a hydrazine fuel cell, providing more insight into the hydrazine oxidation process during cell operation.
- Subjects
ALKALINE fuel cells; MULTIWALLED carbon nanotubes; HYDRAZINE; CARBON nanotubes; CARBON electrodes; HYDRAZINES; NANOPARTICLES; FUEL cells
- Publication
ChemSusChem, 2023, Vol 16, Issue 5, p1
- ISSN
1864-5631
- Publication type
Article
- DOI
10.1002/cssc.202201608