Growth and characterization of iridium dioxide nanorods

Chen, R.S.; Huang, Y. S.; Liang, Ya-Min; Tsai, Dah–Shyang; Tiong, K. K.

doi:10.1016/j.jallcom.2004.04.050

Cited by 26 publications

(16 citation statements)

References 20 publications

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“…27 IrO2 nanostructured materials were mostly synthesized by metal organic chemical vapor deposition (MOCVD) method. 23,28,29,30,31,32,33,34,25 A variety of IrO2 nanostructures have also been produced by various other techniques, including vapor phase transport process, 35 electrochemical synthesis, 13 arc vaporization, 36 hydrothermal, 4 reactive radio frequency magnetron sputtering (RFMS), 37 sol-gel, 38,39 wetness method, 9 Adams fusion method, 15,16 sulfite complex route, 14 thermal decomposition of precursor (H2IrCl6), 17 oleylamine-mediated synthesis, etc. 10 With a closer look, it can be found that many of these methods employ expensive, complex, unstable and not-environmentally-friendly iridium-containing precursors followed with tedious synthetic procedure in complicated experimental setups.…”

Section: Introductionmentioning

confidence: 99%

Ultrafine Iridium Oxide Nanorods Synthesized by Molten Salt Method toward Electrocatalytic Oxygen and Hydrogen Evolution Reactions

Ahmed

Mao

2016

Electrochimica Acta

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Ultrafine iridium oxide nanorods (IrO2 NRs) were successfully synthesized using a molten salt method at 650 o C. The structural and morphological characterizations of these IrO2 NRs were carried out by powder X-ray diffraction, Raman spectroscopy and electron microscopic techniques. Compared to commercial IrO2 nanoparticles (IrO2 NPs) and previous reports, these IrO2 NRs show enhanced electrocatalytic activity to oxygen and hydrogen evolution reactions by passing either N2 or O2 gas in a 0.5 M KOH electrolyte before electrochemical measurements, including cyclic voltammetry, chronoamperometry and electrochemical impedance spectroscopy. Specifically, the current densities from the as-synthesized IrO2 NRs and commercial IrO2 NPs were measured in 0.5 M KOH electrolyte to be 70 and 58 (OER, deaerated, at 0.6 V versus Ag/AgCl), 71 and 61 (OER, O2, from-0.10 to 1.0 V versus Ag/AgCl at 50 mV/s), and 25 and 14 (HER, deaerated, at-1.4 V versus Ag/AgCl) mA/cm 2 , respectively. These results are comparable with, and in most cases, higher than reported data in the literature. Therefore, the current study reports not only a novel synthetic process for IrO2 but also a high efficient IrO2 nanostructure, and it is expected that these IrO2 NRs can serve as a benchmark in the development of active OER and HER (photo)electrocatalysts for various applications.

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Section: Introductionmentioning

confidence: 99%

Ultrafine Iridium Oxide Nanorods Synthesized by Molten Salt Method toward Electrocatalytic Oxygen and Hydrogen Evolution Reactions

Ahmed

Mao

2016

Electrochimica Acta

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“…Iridium nanoparticles, which are usually found in the form of iridium oxide, have been synthesized in a variety of ways, either as nanorods [200], as particles using solgels [201], or as colloidal suspensions containing mixed metal oxides [202]. Although several iridium structures have been prepared, their electroanalytical applications to date have primarily been in biosensors, due to their ability to catalytically oxidize and reduce hydrogen peroxide [203][204][205][206].…”

Section: Nanoparticles Of Other Metallic Speciesmentioning

confidence: 99%

Metal Nanoparticles: Applications in Electroanalysis

Lawrence

Liang

2008

Nanostructured Materials in Electrochemistry

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“…In addition, IrO 2 has been preferred for enzyme-based biosensors or neurostimulating electrodes because of its important traits of biocompatibility and antifouling ability for long-term usage [8,9]. Researchers have successfully synthesised and characterised IrO 2 nanostructures [1,3,10,11]. Nanoscaled IrO 2 with a low surface work function of 4.23 eV can be utilised as the catalyst for water splitting or methanol oxidation in fuel cells [11,12].…”

mentioning

confidence: 99%

“…Researchers have successfully synthesised and characterised IrO 2 nanostructures [1,3,10,11]. Nanoscaled IrO 2 with a low surface work function of 4.23 eV can be utilised as the catalyst for water splitting or methanol oxidation in fuel cells [11,12]. The recent success in fabricating one-dimensional nanosized IrO 2 with high surface areas offers a promising means of improving the performance of IrO 2 -based supercapacitors, implantable biosensors and electrochemical catalysts.…”

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confidence: 99%

Chemical bath method to grow precipitated nanorods of iridium oxide on alumina membranes

et al. 2012

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High aspect ratio iridium (IV) oxide nanorods have been successfully grown on a copper thin film by a chemical co-precipitation method. A porous anodised aluminium oxide (AAO) template was implemented to assist the growth of the well aligned and densely packed iridium oxide (IrO 2) nanostructures. Nanorods with an aspect ratio of 22 can be synthesised within 45 min. X-ray diffraction measurement unveiled the crucial role of the AAO template in the orientation-aligned growth of IrO 2 nanorods along the [110] crystallography direction. The large surface area of IrO 2 nanostructures exhibiting a high capacitive property can be utilised in supercapacitors or sensing applications. Owing to the simpler fabrication processes, IrO 2 nanorods can be mass produced in a short period of time.

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Growth and characterization of iridium dioxide nanorods

Cited by 26 publications

References 20 publications

Ultrafine Iridium Oxide Nanorods Synthesized by Molten Salt Method toward Electrocatalytic Oxygen and Hydrogen Evolution Reactions

Ultrafine Iridium Oxide Nanorods Synthesized by Molten Salt Method toward Electrocatalytic Oxygen and Hydrogen Evolution Reactions

Metal Nanoparticles: Applications in Electroanalysis

Chemical bath method to grow precipitated nanorods of iridium oxide on alumina membranes

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