First approach of fractals nickel-copper dendrites on stainless steel electrodes for ammonia oxidation to nitrogen monitored in operando by differential electrochemical mass spectroscopy

Simple item page
dc.contributor.authorMatamala-Troncoso, Felipe
dc.contributor.authorDiaz-Coello, Sergio
dc.contributor.authorMartinez, Francisco
dc.contributor.authorBarrientos, Herna
dc.contributor.authorLisoni, Judit
dc.contributor.authorArmijo, Francisco
dc.contributor.authorLozano, David
dc.contributor.authorPizarro, Jaime
dc.contributor.authorArevalo, Maria del Carmen
dc.contributor.authorPastor, Elena
dc.contributor.authorAguirre, Maria Jesus
dc.date.accessioned2025-01-20T16:09:44Z
dc.date.available2025-01-20T16:09:44Z
dc.date.issued2024
dc.description.abstractFractal nickel-copper dendrites were synthesized by electrochemical deposition (ECD) on a stainless steel electrode (SS/NiCu). The electrode surface was characterized using Field Emission Scanning Electron Microscopy (FE-SEM), X-ray diffractometry (XRD), and Raman spectroscopy. The Ni-Cu molar ratio and the time applied in the ECD method were studied, revealing that both are critical factors in modifying and controlling the surface morphology. The SS/NiCu electrodes show a higher density current response when exposed to ammonium hydroxide, reaching a limiting current density at concentrations above 0.050 M NH4OH. 4 OH. Ammonia oxidation reaction (AOR) was monitored in operando using differential electrochemical mass spectroscopy (DEMS). When a bias potential over +1.50 V (vs. RHE) was applied, the evolution of oxygen and NO was observed. However, N2 2 was the only oxidation product at a constant potential below +1.50 V (vs. RHE). Oxygen (O2) 2 ) evolution was the main competitive reaction during the AOR. The results show that products are strongly dependent on the electrochemical perturbation applied. The study demonstrated that the SS/NiCu electrodes are suitable for AOR to N2 2 in high alkaline conditions.
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.electacta.2024.144894
dc.identifier.eissn1873-3859
dc.identifier.issn0013-4686
dc.identifier.urihttps://doi.org/10.1016/j.electacta.2024.144894
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/90170
dc.identifier.wosidWOS:001302833000001
dc.language.isoen
dc.revistaElectrochimica acta
dc.rightsacceso restringido
dc.subjectNi dendrites
dc.subjectNickel copper alloy
dc.subjectStainless steel
dc.subjectAmmonia oxidation
dc.subjectDEMS
dc.subject.ods07 Affordable and Clean Energy
dc.subject.odspa07 Energía asequible y no contaminante
dc.titleFirst approach of fractals nickel-copper dendrites on stainless steel electrodes for ammonia oxidation to nitrogen monitored in operando by differential electrochemical mass spectroscopy
dc.typeartículo
dc.volumen504
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
Files
Collections
Artículos de revistas