Exploration of the Thermally Prepared Iridium Oxide (IrO2) and Tantalum Pentoxide (Ta2O5) Coated Titanium Anode in the Oxygen Evolution Reactions (OER)

Gracien Ekoko Bakambo; Joseph Kanza-Kanza Lobo; Omer Muamba Mvele; Jérémie Muswema Lunguya; Jean-Felix Yamambe Senga; Peter Mangwala Kimpende

doi:doi:10.11648/j.ijmsa.s.2014030601.11

Exploration of the Thermally Prepared Iridium Oxide (IrO2) and Tantalum Pentoxide (Ta2O5) Coated Titanium Anode in the Oxygen Evolution Reactions (OER)

Gracien Ekoko Bakambo, Joseph Kanza-Kanza Lobo, Omer Muamba Mvele, Jérémie Muswema Lunguya, Jean-Felix Yamambe Senga, Peter Mangwala Kimpende

Published in International Journal of Materials Science and Applications (Volume 3, Issue 6-1)

Received: 8 October 2014 Accepted: 24 November 2014 Published: 29 November 2014

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Abstract

A coat consisting of IrO2-Ta2O5 as a catalytically active layer on a titanium substrate was prepared by the thermal decomposition method followed by the anodic electrolysis process in an aqueous solution of H2SO4 0.5 mol.dm-3 at 4 A.Cm-2 current density. The morphology and the composition of the coating were investigated both by the field emission scanning electron microscope (FE-SEM) coupled with the energy dispersive X-ray spectrometer (EDS), X-ray diffraction (XRD), and by X-ray photoelectron spectroscopy (XPS). The XRD and the XPS experimental results revealed that some of the texture coefficients of IrO2-rutile crystal preferentially grown and the crystal lattice changes with aging time in air furnace at 100 °C. It was observed that at 4 A.Cm-2, this coated material behaves as a good catalytically active layer for oxygen evolution reactions (OER). The OER process leads to the corrosion of the surface banks layer by layer, and consequently the cracks appeared and expanded, resulting in fragmentation and further peeling. The EDS results revealed that during the electrolysis of the coated electrode there was a selective consumption of the iridium oxide. The presence of titanium metal was detected in the outermost coating. This might be originated from the titanium foil dissolved and diffused through the coated layer defects during the electrolysis process.

Published in	International Journal of Materials Science and Applications (Volume 3, Issue 6-1) This article belongs to the Special Issue Materials Science
DOI	10.11648/j.ijmsa.s.2014030601.11
Page(s)	1-6
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2014. Published by Science Publishing Group

Keywords

Iridium Oxide (IrO2), Tantalum Pentoxide (Ta2O5), Ti Metal, OER

References

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Gracien Ekoko Bakambo, Joseph Kanza-Kanza Lobo, Omer Muamba Mvele, Jérémie Muswema Lunguya, Jean-Felix Yamambe Senga, et al. (2014). Exploration of the Thermally Prepared Iridium Oxide (IrO2) and Tantalum Pentoxide (Ta2O5) Coated Titanium Anode in the Oxygen Evolution Reactions (OER). International Journal of Materials Science and Applications, 3(6-1), 1-6. https://doi.org/10.11648/j.ijmsa.s.2014030601.11

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ACS Style

Gracien Ekoko Bakambo; Joseph Kanza-Kanza Lobo; Omer Muamba Mvele; Jérémie Muswema Lunguya; Jean-Felix Yamambe Senga, et al. Exploration of the Thermally Prepared Iridium Oxide (IrO2) and Tantalum Pentoxide (Ta2O5) Coated Titanium Anode in the Oxygen Evolution Reactions (OER). Int. J. Mater. Sci. Appl. 2014, 3(6-1), 1-6. doi: 10.11648/j.ijmsa.s.2014030601.11

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AMA Style

Gracien Ekoko Bakambo, Joseph Kanza-Kanza Lobo, Omer Muamba Mvele, Jérémie Muswema Lunguya, Jean-Felix Yamambe Senga, et al. Exploration of the Thermally Prepared Iridium Oxide (IrO2) and Tantalum Pentoxide (Ta2O5) Coated Titanium Anode in the Oxygen Evolution Reactions (OER). Int J Mater Sci Appl. 2014;3(6-1):1-6. doi: 10.11648/j.ijmsa.s.2014030601.11

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@article{10.11648/j.ijmsa.s.2014030601.11,
  author = {Gracien Ekoko Bakambo and Joseph Kanza-Kanza Lobo and Omer Muamba Mvele and Jérémie Muswema Lunguya and Jean-Felix Yamambe Senga and Peter Mangwala Kimpende},
  title = {Exploration of the Thermally Prepared Iridium Oxide (IrO2) and Tantalum Pentoxide (Ta2O5) Coated Titanium Anode in the Oxygen Evolution Reactions (OER)},
  journal = {International Journal of Materials Science and Applications},
  volume = {3},
  number = {6-1},
  pages = {1-6},
  doi = {10.11648/j.ijmsa.s.2014030601.11},
  url = {https://doi.org/10.11648/j.ijmsa.s.2014030601.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijmsa.s.2014030601.11},
  abstract = {A coat consisting of IrO2-Ta2O5 as a catalytically active layer on a titanium substrate was prepared by the thermal decomposition method followed by the anodic electrolysis process in an aqueous solution of H2SO4 0.5 mol.dm-3 at 4 A.Cm-2 current density. The morphology and the composition of the coating were investigated both by the field emission scanning electron microscope (FE-SEM) coupled with the energy dispersive X-ray spectrometer (EDS), X-ray diffraction (XRD), and by X-ray photoelectron spectroscopy (XPS). The XRD and the XPS experimental results revealed that some of the texture coefficients of IrO2-rutile crystal preferentially grown and the crystal lattice changes with aging time in air furnace at 100 °C. It was observed that at 4 A.Cm-2, this coated material behaves as a good catalytically active layer for oxygen evolution reactions (OER). The OER process leads to the corrosion of the surface banks layer by layer, and consequently the cracks appeared and expanded, resulting in fragmentation and further peeling. The EDS results revealed that during the electrolysis of the coated electrode there was a selective consumption of the iridium oxide. The presence of titanium metal was detected in the outermost coating. This might be originated from the titanium foil dissolved and diffused through the coated layer defects during the electrolysis process.},
 year = {2014}
}

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TY  - JOUR
T1  - Exploration of the Thermally Prepared Iridium Oxide (IrO2) and Tantalum Pentoxide (Ta2O5) Coated Titanium Anode in the Oxygen Evolution Reactions (OER)
AU  - Gracien Ekoko Bakambo
AU  - Joseph Kanza-Kanza Lobo
AU  - Omer Muamba Mvele
AU  - Jérémie Muswema Lunguya
AU  - Jean-Felix Yamambe Senga
AU  - Peter Mangwala Kimpende
Y1  - 2014/11/29
PY  - 2014
N1  - https://doi.org/10.11648/j.ijmsa.s.2014030601.11
DO  - 10.11648/j.ijmsa.s.2014030601.11
T2  - International Journal of Materials Science and Applications
JF  - International Journal of Materials Science and Applications
JO  - International Journal of Materials Science and Applications
SP  - 1
EP  - 6
PB  - Science Publishing Group
SN  - 2327-2643
UR  - https://doi.org/10.11648/j.ijmsa.s.2014030601.11
AB  - A coat consisting of IrO2-Ta2O5 as a catalytically active layer on a titanium substrate was prepared by the thermal decomposition method followed by the anodic electrolysis process in an aqueous solution of H2SO4 0.5 mol.dm-3 at 4 A.Cm-2 current density. The morphology and the composition of the coating were investigated both by the field emission scanning electron microscope (FE-SEM) coupled with the energy dispersive X-ray spectrometer (EDS), X-ray diffraction (XRD), and by X-ray photoelectron spectroscopy (XPS). The XRD and the XPS experimental results revealed that some of the texture coefficients of IrO2-rutile crystal preferentially grown and the crystal lattice changes with aging time in air furnace at 100 °C. It was observed that at 4 A.Cm-2, this coated material behaves as a good catalytically active layer for oxygen evolution reactions (OER). The OER process leads to the corrosion of the surface banks layer by layer, and consequently the cracks appeared and expanded, resulting in fragmentation and further peeling. The EDS results revealed that during the electrolysis of the coated electrode there was a selective consumption of the iridium oxide. The presence of titanium metal was detected in the outermost coating. This might be originated from the titanium foil dissolved and diffused through the coated layer defects during the electrolysis process.
VL  - 3
IS  - 6-1
ER  -

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Author Information

Gracien Ekoko Bakambo

Chemistry Department, University of Kinshasa, P.O. Box 190, Kinshasa XI, Democratic Republic of Congo
Joseph Kanza-Kanza Lobo

Chemistry Department, University of Kinshasa, P.O. Box 190, Kinshasa XI, Democratic Republic of Congo
Omer Muamba Mvele

Chemistry Department, University of Kinshasa, P.O. Box 190, Kinshasa XI, Democratic Republic of Congo
Jérémie Muswema Lunguya

Chemistry Department, University of Kinshasa, P.O. Box 190, Kinshasa XI, Democratic Republic of Congo
Jean-Felix Yamambe Senga

Chemistry Department, University of Kinshasa, P.O. Box 190, Kinshasa XI, Democratic Republic of Congo
Peter Mangwala Kimpende

Chemistry Department, University of Kinshasa, P.O. Box 190, Kinshasa XI, Democratic Republic of Congo

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APA Style

Gracien Ekoko Bakambo, Joseph Kanza-Kanza Lobo, Omer Muamba Mvele, Jérémie Muswema Lunguya, Jean-Felix Yamambe Senga, et al. (2014). Exploration of the Thermally Prepared Iridium Oxide (IrO2) and Tantalum Pentoxide (Ta2O5) Coated Titanium Anode in the Oxygen Evolution Reactions (OER). International Journal of Materials Science and Applications, 3(6-1), 1-6. https://doi.org/10.11648/j.ijmsa.s.2014030601.11

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ACS Style

Gracien Ekoko Bakambo; Joseph Kanza-Kanza Lobo; Omer Muamba Mvele; Jérémie Muswema Lunguya; Jean-Felix Yamambe Senga, et al. Exploration of the Thermally Prepared Iridium Oxide (IrO2) and Tantalum Pentoxide (Ta2O5) Coated Titanium Anode in the Oxygen Evolution Reactions (OER). Int. J. Mater. Sci. Appl. 2014, 3(6-1), 1-6. doi: 10.11648/j.ijmsa.s.2014030601.11

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AMA Style

Gracien Ekoko Bakambo, Joseph Kanza-Kanza Lobo, Omer Muamba Mvele, Jérémie Muswema Lunguya, Jean-Felix Yamambe Senga, et al. Exploration of the Thermally Prepared Iridium Oxide (IrO2) and Tantalum Pentoxide (Ta2O5) Coated Titanium Anode in the Oxygen Evolution Reactions (OER). Int J Mater Sci Appl. 2014;3(6-1):1-6. doi: 10.11648/j.ijmsa.s.2014030601.11

Copy | Download

@article{10.11648/j.ijmsa.s.2014030601.11,
  author = {Gracien Ekoko Bakambo and Joseph Kanza-Kanza Lobo and Omer Muamba Mvele and Jérémie Muswema Lunguya and Jean-Felix Yamambe Senga and Peter Mangwala Kimpende},
  title = {Exploration of the Thermally Prepared Iridium Oxide (IrO2) and Tantalum Pentoxide (Ta2O5) Coated Titanium Anode in the Oxygen Evolution Reactions (OER)},
  journal = {International Journal of Materials Science and Applications},
  volume = {3},
  number = {6-1},
  pages = {1-6},
  doi = {10.11648/j.ijmsa.s.2014030601.11},
  url = {https://doi.org/10.11648/j.ijmsa.s.2014030601.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijmsa.s.2014030601.11},
  abstract = {A coat consisting of IrO2-Ta2O5 as a catalytically active layer on a titanium substrate was prepared by the thermal decomposition method followed by the anodic electrolysis process in an aqueous solution of H2SO4 0.5 mol.dm-3 at 4 A.Cm-2 current density. The morphology and the composition of the coating were investigated both by the field emission scanning electron microscope (FE-SEM) coupled with the energy dispersive X-ray spectrometer (EDS), X-ray diffraction (XRD), and by X-ray photoelectron spectroscopy (XPS). The XRD and the XPS experimental results revealed that some of the texture coefficients of IrO2-rutile crystal preferentially grown and the crystal lattice changes with aging time in air furnace at 100 °C. It was observed that at 4 A.Cm-2, this coated material behaves as a good catalytically active layer for oxygen evolution reactions (OER). The OER process leads to the corrosion of the surface banks layer by layer, and consequently the cracks appeared and expanded, resulting in fragmentation and further peeling. The EDS results revealed that during the electrolysis of the coated electrode there was a selective consumption of the iridium oxide. The presence of titanium metal was detected in the outermost coating. This might be originated from the titanium foil dissolved and diffused through the coated layer defects during the electrolysis process.},
 year = {2014}
}

Copy | Download

TY  - JOUR
T1  - Exploration of the Thermally Prepared Iridium Oxide (IrO2) and Tantalum Pentoxide (Ta2O5) Coated Titanium Anode in the Oxygen Evolution Reactions (OER)
AU  - Gracien Ekoko Bakambo
AU  - Joseph Kanza-Kanza Lobo
AU  - Omer Muamba Mvele
AU  - Jérémie Muswema Lunguya
AU  - Jean-Felix Yamambe Senga
AU  - Peter Mangwala Kimpende
Y1  - 2014/11/29
PY  - 2014
N1  - https://doi.org/10.11648/j.ijmsa.s.2014030601.11
DO  - 10.11648/j.ijmsa.s.2014030601.11
T2  - International Journal of Materials Science and Applications
JF  - International Journal of Materials Science and Applications
JO  - International Journal of Materials Science and Applications
SP  - 1
EP  - 6
PB  - Science Publishing Group
SN  - 2327-2643
UR  - https://doi.org/10.11648/j.ijmsa.s.2014030601.11
AB  - A coat consisting of IrO2-Ta2O5 as a catalytically active layer on a titanium substrate was prepared by the thermal decomposition method followed by the anodic electrolysis process in an aqueous solution of H2SO4 0.5 mol.dm-3 at 4 A.Cm-2 current density. The morphology and the composition of the coating were investigated both by the field emission scanning electron microscope (FE-SEM) coupled with the energy dispersive X-ray spectrometer (EDS), X-ray diffraction (XRD), and by X-ray photoelectron spectroscopy (XPS). The XRD and the XPS experimental results revealed that some of the texture coefficients of IrO2-rutile crystal preferentially grown and the crystal lattice changes with aging time in air furnace at 100 °C. It was observed that at 4 A.Cm-2, this coated material behaves as a good catalytically active layer for oxygen evolution reactions (OER). The OER process leads to the corrosion of the surface banks layer by layer, and consequently the cracks appeared and expanded, resulting in fragmentation and further peeling. The EDS results revealed that during the electrolysis of the coated electrode there was a selective consumption of the iridium oxide. The presence of titanium metal was detected in the outermost coating. This might be originated from the titanium foil dissolved and diffused through the coated layer defects during the electrolysis process.
VL  - 3
IS  - 6-1
ER  -

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