Electroless deposition of iridium oxide nanoparticles promoted by condensation of [Ir(OH)6]2- on an anodized Au surface: application to electrocatalysis of the oxygen evolution reaction

Pitchiah Esakki Karthik, K Alagar Raja, Shanmugam M Senthil Kumar, Kanala Lakshminarasimha Narasimha Phani, Yuping Liu, Si-Xuan Guo, Jie Zhang, Alan Maxwell Bond

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Abstract

The high reactivity of anodized gold for the condensation of [Ir(OH)6]2- provides a simple procedure for the electroless deposition of catalytically active IrOx nanoparticles supported on a gold electrode (IrOx/Au). With a very low overpotential (?) of only about 370 mV (0.1 M NaOH) required to give a current density of 10 mA cm-2, an average value for a turn over frequency (TOF1.56V) of 6.2 s-1, and high stability under long term catalytic turn-over, the IrOx/Au composite provides the simplest method yet developed for highly efficient iridium oxide-based electrocatalysis of the water oxidation reaction.
Original languageEnglish
Pages (from-to)3196 - 3199
Number of pages4
JournalRSC Advances
Volume5
Issue number5
DOIs
Publication statusPublished - 2015

Cite this

Esakki Karthik, Pitchiah ; Raja, K Alagar ; Senthil Kumar, Shanmugam M ; Phani, Kanala Lakshminarasimha Narasimha ; Liu, Yuping ; Guo, Si-Xuan ; Zhang, Jie ; Bond, Alan Maxwell. / Electroless deposition of iridium oxide nanoparticles promoted by condensation of [Ir(OH)6]2- on an anodized Au surface: application to electrocatalysis of the oxygen evolution reaction. In: RSC Advances. 2015 ; Vol. 5, No. 5. pp. 3196 - 3199.
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abstract = "The high reactivity of anodized gold for the condensation of [Ir(OH)6]2- provides a simple procedure for the electroless deposition of catalytically active IrOx nanoparticles supported on a gold electrode (IrOx/Au). With a very low overpotential (?) of only about 370 mV (0.1 M NaOH) required to give a current density of 10 mA cm-2, an average value for a turn over frequency (TOF1.56V) of 6.2 s-1, and high stability under long term catalytic turn-over, the IrOx/Au composite provides the simplest method yet developed for highly efficient iridium oxide-based electrocatalysis of the water oxidation reaction.",
author = "{Esakki Karthik}, Pitchiah and Raja, {K Alagar} and {Senthil Kumar}, {Shanmugam M} and Phani, {Kanala Lakshminarasimha Narasimha} and Yuping Liu and Si-Xuan Guo and Jie Zhang and Bond, {Alan Maxwell}",
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Electroless deposition of iridium oxide nanoparticles promoted by condensation of [Ir(OH)6]2- on an anodized Au surface: application to electrocatalysis of the oxygen evolution reaction. / Esakki Karthik, Pitchiah; Raja, K Alagar; Senthil Kumar, Shanmugam M; Phani, Kanala Lakshminarasimha Narasimha; Liu, Yuping; Guo, Si-Xuan; Zhang, Jie; Bond, Alan Maxwell.

In: RSC Advances, Vol. 5, No. 5, 2015, p. 3196 - 3199.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Esakki Karthik, Pitchiah

AU - Raja, K Alagar

AU - Senthil Kumar, Shanmugam M

AU - Phani, Kanala Lakshminarasimha Narasimha

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AU - Guo, Si-Xuan

AU - Zhang, Jie

AU - Bond, Alan Maxwell

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AB - The high reactivity of anodized gold for the condensation of [Ir(OH)6]2- provides a simple procedure for the electroless deposition of catalytically active IrOx nanoparticles supported on a gold electrode (IrOx/Au). With a very low overpotential (?) of only about 370 mV (0.1 M NaOH) required to give a current density of 10 mA cm-2, an average value for a turn over frequency (TOF1.56V) of 6.2 s-1, and high stability under long term catalytic turn-over, the IrOx/Au composite provides the simplest method yet developed for highly efficient iridium oxide-based electrocatalysis of the water oxidation reaction.

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