The effect of ruthenium content on the stability and activity of Ti/RuO2-Sb2O5-SnO2 for oxygen evolution

Jiaying Li; Xusong Qin; Guanghao Chen; Guohua Chen

doi:10.1016/j.jtice.2021.06.020

The effect of ruthenium content on the stability and activity of Ti/RuO₂-Sb₂O₅-SnO₂ for oxygen evolution

Jiaying Li, Xusong Qin^*, Guanghao Chen, Guohua Chen^*

^*Corresponding author for this work

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

8 Citations (Scopus)

Abstract

The effects of ruthenium content on Ti/RuO₂-Sb₂O₅-SnO₂ anodes are investigated in terms of catalytic activity and stability for oxygen evolution. The best electrochemical stability appears at nominal Ru content around 30%, giving average accelerated lives of 419 and 165 h at 25 and 70 °C, respectively, under the current density of 500 mA cm⁻² in 3 M H₂SO₄ solution. These values are respectively ~8 and >22 times longer than any types of RuO₂-based electrodes reported previously. The electrocatalytic activity of Ti/RuO₂-Sb₂O₅-SnO₂ anodes is found to increase with nominal Ru content approaching 75%. The physicochemical and electrochemical analyses reveal that the homogeneous intermixture of RuO₂, SnO₂ and Sb₂O₅ with a smooth and compact surface decreases the dissolution rate of RuO₂, leading to a significant improvement on the electrode service life. Despite the numerous pores and cracks found in the coating, Ti/RuO₂-Sb₂O₅-SnO₂ anode with a nominal Ru content of 75% exhibits better electrocatalytic performance for O₂ evolution, which is attributed to more active RuO₂ sites exposed to electrolyte. Therefore, the existence of the optimal Ru content for Ti/RuO₂-Sb₂O₅-SnO₂ is the balanced effect between electrochemical stability and activity for O₂ evolution, as well as cost for specific applications.

Original language	English
Pages (from-to)	186-194
Journal	Journal of the Taiwan Institute of Chemical Engineers
Volume	125
Online published	28 Jun 2021
DOIs	https://doi.org/10.1016/j.jtice.2021.06.020
Publication status	Published - Aug 2021
Externally published	Yes

Research Keywords

DSA
Electrochemical stability
Metal oxide coating
O2 evolution
Ru-based electro-catalyst

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This output contributes to the following UN Sustainable Development Goals (SDGs)

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title = "The effect of ruthenium content on the stability and activity of Ti/RuO2-Sb2O5-SnO2 for oxygen evolution",

abstract = "The effects of ruthenium content on Ti/RuO2-Sb2O5-SnO2 anodes are investigated in terms of catalytic activity and stability for oxygen evolution. The best electrochemical stability appears at nominal Ru content around 30%, giving average accelerated lives of 419 and 165 h at 25 and 70 °C, respectively, under the current density of 500 mA cm−2 in 3 M H2SO4 solution. These values are respectively ~8 and >22 times longer than any types of RuO2-based electrodes reported previously. The electrocatalytic activity of Ti/RuO2-Sb2O5-SnO2 anodes is found to increase with nominal Ru content approaching 75%. The physicochemical and electrochemical analyses reveal that the homogeneous intermixture of RuO2, SnO2 and Sb2O5 with a smooth and compact surface decreases the dissolution rate of RuO2, leading to a significant improvement on the electrode service life. Despite the numerous pores and cracks found in the coating, Ti/RuO2-Sb2O5-SnO2 anode with a nominal Ru content of 75% exhibits better electrocatalytic performance for O2 evolution, which is attributed to more active RuO2 sites exposed to electrolyte. Therefore, the existence of the optimal Ru content for Ti/RuO2-Sb2O5-SnO2 is the balanced effect between electrochemical stability and activity for O2 evolution, as well as cost for specific applications.",

keywords = "DSA, Electrochemical stability, Metal oxide coating, O2 evolution, Ru-based electro-catalyst",

author = "Jiaying Li and Xusong Qin and Guanghao Chen and Guohua Chen",

year = "2021",

month = aug,

doi = "10.1016/j.jtice.2021.06.020",

language = "English",

volume = "125",

pages = "186--194",

journal = "Journal of the Taiwan Institute of Chemical Engineers",

issn = "1876-1070",

publisher = "Taiwan Institute of Chemical Engineers",

}

TY - JOUR

T1 - The effect of ruthenium content on the stability and activity of Ti/RuO2-Sb2O5-SnO2 for oxygen evolution

AU - Li, Jiaying

AU - Qin, Xusong

AU - Chen, Guanghao

AU - Chen, Guohua

PY - 2021/8

Y1 - 2021/8

N2 - The effects of ruthenium content on Ti/RuO2-Sb2O5-SnO2 anodes are investigated in terms of catalytic activity and stability for oxygen evolution. The best electrochemical stability appears at nominal Ru content around 30%, giving average accelerated lives of 419 and 165 h at 25 and 70 °C, respectively, under the current density of 500 mA cm−2 in 3 M H2SO4 solution. These values are respectively ~8 and >22 times longer than any types of RuO2-based electrodes reported previously. The electrocatalytic activity of Ti/RuO2-Sb2O5-SnO2 anodes is found to increase with nominal Ru content approaching 75%. The physicochemical and electrochemical analyses reveal that the homogeneous intermixture of RuO2, SnO2 and Sb2O5 with a smooth and compact surface decreases the dissolution rate of RuO2, leading to a significant improvement on the electrode service life. Despite the numerous pores and cracks found in the coating, Ti/RuO2-Sb2O5-SnO2 anode with a nominal Ru content of 75% exhibits better electrocatalytic performance for O2 evolution, which is attributed to more active RuO2 sites exposed to electrolyte. Therefore, the existence of the optimal Ru content for Ti/RuO2-Sb2O5-SnO2 is the balanced effect between electrochemical stability and activity for O2 evolution, as well as cost for specific applications.

AB - The effects of ruthenium content on Ti/RuO2-Sb2O5-SnO2 anodes are investigated in terms of catalytic activity and stability for oxygen evolution. The best electrochemical stability appears at nominal Ru content around 30%, giving average accelerated lives of 419 and 165 h at 25 and 70 °C, respectively, under the current density of 500 mA cm−2 in 3 M H2SO4 solution. These values are respectively ~8 and >22 times longer than any types of RuO2-based electrodes reported previously. The electrocatalytic activity of Ti/RuO2-Sb2O5-SnO2 anodes is found to increase with nominal Ru content approaching 75%. The physicochemical and electrochemical analyses reveal that the homogeneous intermixture of RuO2, SnO2 and Sb2O5 with a smooth and compact surface decreases the dissolution rate of RuO2, leading to a significant improvement on the electrode service life. Despite the numerous pores and cracks found in the coating, Ti/RuO2-Sb2O5-SnO2 anode with a nominal Ru content of 75% exhibits better electrocatalytic performance for O2 evolution, which is attributed to more active RuO2 sites exposed to electrolyte. Therefore, the existence of the optimal Ru content for Ti/RuO2-Sb2O5-SnO2 is the balanced effect between electrochemical stability and activity for O2 evolution, as well as cost for specific applications.

KW - DSA

KW - Electrochemical stability

KW - Metal oxide coating

KW - O2 evolution

KW - Ru-based electro-catalyst

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U2 - 10.1016/j.jtice.2021.06.020

DO - 10.1016/j.jtice.2021.06.020

M3 - RGC 21 - Publication in refereed journal

SN - 1876-1070

VL - 125

SP - 186

EP - 194

JO - Journal of the Taiwan Institute of Chemical Engineers

JF - Journal of the Taiwan Institute of Chemical Engineers

ER -

The effect of ruthenium content on the stability and activity of Ti/RuO₂-Sb₂O₅-SnO₂ for oxygen evolution

Abstract

Research Keywords

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The effect of ruthenium content on the stability and activity of Ti/RuO2-Sb2O5-SnO2 for oxygen evolution

Abstract

Research Keywords

UN SDGs

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TBRS-ExtU-Lead: A Paradigm-shifting, Fully-integrated, Compact Wastewater-to-resource Facility (WWRF)

Cite this

The effect of ruthenium content on the stability and activity of Ti/RuO₂-Sb₂O₅-SnO₂ for oxygen evolution