Stable Ti/IrOx-Sb2O5-SnO2 anode for O2 evolution with low Ir content

Xueming Chen; Guohua Chen; Po Lock Yue

doi:10.1021/jp010038d

Stable Ti/IrO_x-Sb₂O₅-SnO₂ anode for O₂ evolution with low Ir content

Xueming Chen, Guohua Chen, Po Lock Yue

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

209 Citations (Scopus)

Abstract

Titanium anodes coated with a ternary iridium, antimony, and tin oxide mixture (Ti/IrO_x-Sb₂O₅-SnO₂) were investigated for oxygen evolution. In the active oxide coating, SnO₂ serves as a dispersing agent, Sb₂O₅ as a dopant, and IrO_x as a catalyst. Experimental results showed that the Ti/IrO_x-Sb₂O₅-SnO₂ electrode containing only 10 mol % of IrO_x nominally in the coating had a service life of 1600 h in 3 M H₂SO₄ solution under a current density of 1 A cm^-1 at 35°C, compared with 355 h for Ti/IrO_x under the same conditions. Instrumental analysis indicated that the IrO_x-Sb₂O₅-SnO₂ was a metastable solid solution with a compact structure, which contributes to the superstable nature of the electrode together with the good conductivity and the improvement of bonding with the TiO₂ interlayer formed during calcination.

Original language	English
Pages (from-to)	4623-4628
Journal	The Journal of Physical Chemistry B
Volume	105
Issue number	20
DOIs	https://doi.org/10.1021/jp010038d
Publication status	Published - 24 May 2001
Externally published	Yes

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title = "Stable Ti/IrOx-Sb2O5-SnO2 anode for O2 evolution with low Ir content",

abstract = "Titanium anodes coated with a ternary iridium, antimony, and tin oxide mixture (Ti/IrOx-Sb2O5-SnO2) were investigated for oxygen evolution. In the active oxide coating, SnO2 serves as a dispersing agent, Sb2O5 as a dopant, and IrOx as a catalyst. Experimental results showed that the Ti/IrOx-Sb2O5-SnO2 electrode containing only 10 mol % of IrOx nominally in the coating had a service life of 1600 h in 3 M H2SO4 solution under a current density of 1 A cm-1 at 35°C, compared with 355 h for Ti/IrOx under the same conditions. Instrumental analysis indicated that the IrOx-Sb2O5-SnO2 was a metastable solid solution with a compact structure, which contributes to the superstable nature of the electrode together with the good conductivity and the improvement of bonding with the TiO2 interlayer formed during calcination.",

author = "Xueming Chen and Guohua Chen and Yue, {Po Lock}",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected]. ",

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T1 - Stable Ti/IrOx-Sb2O5-SnO2 anode for O2 evolution with low Ir content

AU - Chen, Xueming

AU - Chen, Guohua

AU - Yue, Po Lock

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2001/5/24

Y1 - 2001/5/24

N2 - Titanium anodes coated with a ternary iridium, antimony, and tin oxide mixture (Ti/IrOx-Sb2O5-SnO2) were investigated for oxygen evolution. In the active oxide coating, SnO2 serves as a dispersing agent, Sb2O5 as a dopant, and IrOx as a catalyst. Experimental results showed that the Ti/IrOx-Sb2O5-SnO2 electrode containing only 10 mol % of IrOx nominally in the coating had a service life of 1600 h in 3 M H2SO4 solution under a current density of 1 A cm-1 at 35°C, compared with 355 h for Ti/IrOx under the same conditions. Instrumental analysis indicated that the IrOx-Sb2O5-SnO2 was a metastable solid solution with a compact structure, which contributes to the superstable nature of the electrode together with the good conductivity and the improvement of bonding with the TiO2 interlayer formed during calcination.

AB - Titanium anodes coated with a ternary iridium, antimony, and tin oxide mixture (Ti/IrOx-Sb2O5-SnO2) were investigated for oxygen evolution. In the active oxide coating, SnO2 serves as a dispersing agent, Sb2O5 as a dopant, and IrOx as a catalyst. Experimental results showed that the Ti/IrOx-Sb2O5-SnO2 electrode containing only 10 mol % of IrOx nominally in the coating had a service life of 1600 h in 3 M H2SO4 solution under a current density of 1 A cm-1 at 35°C, compared with 355 h for Ti/IrOx under the same conditions. Instrumental analysis indicated that the IrOx-Sb2O5-SnO2 was a metastable solid solution with a compact structure, which contributes to the superstable nature of the electrode together with the good conductivity and the improvement of bonding with the TiO2 interlayer formed during calcination.

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DO - 10.1021/jp010038d

M3 - RGC 21 - Publication in refereed journal

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