Detail publikačního výsledku

Wireless electrochemical fabrication of tungsten oxide nanoporous layers in closed bipolar cells

SEPÚLVEDA SEPÚLVEDA, L.; BAISHYA, K.; RODRIGUEZ PEREIRA, J.; ČIČMANCOVÁ, V.; HROMÁDKO, L.; MACÁK, J.

Originální název

Wireless electrochemical fabrication of tungsten oxide nanoporous layers in closed bipolar cells

Anglický název

Wireless electrochemical fabrication of tungsten oxide nanoporous layers in closed bipolar cells

Druh

Článek WoS

Originální abstrakt

In this work, the anodization of tungsten (W) foils using closed bipolar electrochemical cells is demonstrated for the first time. The anodization was done using three different electrolytes: (1) 1 M NH4NO3, 1 wt%. H2O in ethylene glycol (EG); (2) 1 M (NH4)2SO4, 75 mM NH4F in H2O; and (3) 170 mM NH4 1.5 wt%. H2O in EG. Different square-wave potentials and frequencies were applied during the anodization. Among the tested electrolytes, electrolyte 1 produced the most well-defined and homogeneous WO3 nanoporous (NP) layers. X-ray photoelectron spectroscopy confirmed the presence of multiple W oxidation states on the WO3 NP layers using electrolytes 1 and 2, with W6+ and W5+ being the dominant species. The results demonstrate well-defined WO3 NP layers with a high W6+ species concentration and less than 10 at.% W5+ is achieved using electrolyte 1. These findings provide valuable insights into the relationship between the electrolyte composition, W oxidation states, and the morphology of WO3 NP layers.

Anglický abstrakt

In this work, the anodization of tungsten (W) foils using closed bipolar electrochemical cells is demonstrated for the first time. The anodization was done using three different electrolytes: (1) 1 M NH4NO3, 1 wt%. H2O in ethylene glycol (EG); (2) 1 M (NH4)2SO4, 75 mM NH4F in H2O; and (3) 170 mM NH4 1.5 wt%. H2O in EG. Different square-wave potentials and frequencies were applied during the anodization. Among the tested electrolytes, electrolyte 1 produced the most well-defined and homogeneous WO3 nanoporous (NP) layers. X-ray photoelectron spectroscopy confirmed the presence of multiple W oxidation states on the WO3 NP layers using electrolytes 1 and 2, with W6+ and W5+ being the dominant species. The results demonstrate well-defined WO3 NP layers with a high W6+ species concentration and less than 10 at.% W5+ is achieved using electrolyte 1. These findings provide valuable insights into the relationship between the electrolyte composition, W oxidation states, and the morphology of WO3 NP layers.

Klíčová slova

Anodization; Bipolar electrochemistry; Closed cell; Tungsten; WO3; Nanoporous

Klíčová slova v angličtině

Anodization; Bipolar electrochemistry; Closed cell; Tungsten; WO3; Nanoporous

Autoři

SEPÚLVEDA SEPÚLVEDA, L.; BAISHYA, K.; RODRIGUEZ PEREIRA, J.; ČIČMANCOVÁ, V.; HROMÁDKO, L.; MACÁK, J.

Vydáno

01.07.2025

Nakladatel

ELSEVIER SCIENCE INC

Místo

NEW YORK

ISSN

1873-1902

Periodikum

Electrochemistry Communications

Svazek

176

Číslo

7

Stát

Spojené státy americké

Strany od

1

Strany do

7

Strany počet

7

URL

https://www.sciencedirect.com/science/article/pii/S138824812500102X

Plný text v Digitální knihovně

http://hdl.handle.net/11012/255169

BibTex

@article{BUT198232,
  author="Lina Marcela {Sepúlveda Sepúlveda} and Kaushik {Baishya} and Jhonatan {Rodriguez Pereira} and Veronika {Čičmancová} and Luděk {Hromádko} and Jan {Macák}",
  title="Wireless electrochemical fabrication of tungsten oxide nanoporous layers in closed bipolar cells",
  journal="Electrochemistry Communications",
  year="2025",
  volume="176",
  number="7",
  pages="1--7",
  doi="10.1016/j.elecom.2025.107963",
  issn="1388-2481",
  url="https://www.sciencedirect.com/science/article/pii/S138824812500102X"
}

Dokumenty

1-s2.0-S138824812500102X-main