Ruthenium oxide-based nanocomposites with high specific surface area and improved capacitance as a supercapacitor

Wang, Pengfei; Liu, Hui; Tan, Qiangqiang; Yang, Jun

doi:10.1039/c4ra07044e

Cited by 46 publications

(24 citation statements)

References 42 publications

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“…%, as seen in Table . The spin‐orbit splitting of the Ru species shown in Table correlates well with those reported in the literature for ruthenium interacting with carbon . Analysis of the Ru 3p region confirms the presence of Ru° and Ru IV at the electrocatalysts (Figures e–g)…”

Section: Resultssupporting

confidence: 89%

Functionalizing Reduced Graphene Oxide with Ru‐Organometallic Compounds as an Effective Strategy to Produce High‐Performance Pt Nanocatalysts for the Methanol Oxidation Reaction

Siller-Ceniceros¹,

Sánchez-Castro²,

Morales-Acosta

et al. 2019

ChemElectroChem

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An efficient route to chemically functionalize reduced graphene oxide (rGO) with ruthenium organometallic compounds and the subsequent anchorage of Pt nanoparticles is reported. Two organometallic complexes, [(η6‐C6H5OCH2CH2OH) RuCl2]2 (Ru‐dim) and [(η6‐C6H4(CHMe2)Me)RuCl2]2 (Ru‐cym), as well as commercial RuCl3 ⋅ XH2O (Ru‐com) have been synthetized an used as functionalizing agents. By implementing a conventional polyol synthesis method, the Pt/rGORu‐dim, Pt/rGORu‐cym, Pt/rGORu‐com and Pt/rGO nanocatalysts have been synthetized. Characterization by XRD indicates that the presence of Ru leads to the formation of Pt−Ru alloyed phases due to overlapping of Pt fcc and Ru hcp reflections. When characterized for the methanol oxidation reaction (MOR) in acid media, Pt/rGORu‐dim reached a mass current density of 491.49 mA mgPt−1, higher than those generated by the other nanocatalysts. The results show that the functionalization of rGO with Ru‐dim remarkably increases the catalytic activity of Pt for the MOR, suggesting Pt−Ru metal−metal interactions that promotes the anodic reaction.

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Section: Resultssupporting

confidence: 89%

Functionalizing Reduced Graphene Oxide with Ru‐Organometallic Compounds as an Effective Strategy to Produce High‐Performance Pt Nanocatalysts for the Methanol Oxidation Reaction

Siller-Ceniceros¹,

Sánchez-Castro²,

Morales-Acosta

et al. 2019

ChemElectroChem

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show abstract

“…At room temperature, monoclinic I (γ‐WO 3 ) is the most commonly observed stable phase. For monoclinic WO 3 , each unit cell contains eight WO 6 octahedra and the distance between two neighboring tungsten atoms is 0.375 nm . If monoclinic WO 3 is annealed at higher temperature, it transforms into other crystal structures (orthorhombic and tetragonal).…”

Section: Overview Of Wo3 Compoundsmentioning

confidence: 99%

“…Nanomaterials with various attractive physical and chemical properties have been used as electrodes in energy‐storage devices. Early research reports on SCs mainly focused on PCMs, such as RuO 2 , and IrO 2 . However, the high cost and toxic nature of RuO 2 restricted its utilization for large‐scale commercial applications.…”

Section: Introductionmentioning

confidence: 99%

Review on Recent Progress in the Development of Tungsten Oxide Based Electrodes for Electrochemical Energy Storage

Shinde

2019

ChemSusChem

150

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Current progress in the advancement of energy‐storage devices is the most important factor that will allow the scientific community to develop resources to meet the global energy demands of the 21st century. Nanostructured materials can be used as effective electrodes for energy‐storage devices because they offer various promising features, including high surface‐to‐volume ratios, exceptional charge‐transport features, and good physicochemical properties. Until now, the successful research frontrunners have focused on the preparation of positive electrode materials for energy‐storage applications; nevertheless, the electrochemical performance of negative electrodes is less frequently reported. This review mainly focuses on the current progress in the development of tungsten oxide‐based electrodes for energy‐storage applications, primarily supercapacitors (SCs) and batteries. Tungsten is found in various stoichiometric and nonstoichiometric oxides. Among the different tungsten oxide materials, tungsten trioxide (WO3) has been intensively investigated as an electrode material for different applications because of its excellent charge‐transport features, unique physicochemical properties, and good resistance to corrosion. Various WO3 composites, such as WO3/carbon, WO3/polymers, WO3/metal oxides, and tungsten‐based binary metal oxides, have been used for application in SCs and batteries. However, pristine WO3 suffers from a relatively low specific surface area and low energy density. Therefore, it is crucial to thoroughly summarize recent progress in utilizing WO3‐based materials from various perspectives to enhance their performance. Herein, the potential‐ and pH‐dependent behavior of tungsten in aqueous media is discussed. Recent progress in the advancement of nanostructured WO3 and tungsten oxide‐based composites, along with related charge‐storage mechanisms and their electrochemical performances in SCs and batteries, is systematically summarized. Finally, remarks are made on future research challenges and the prospect of using tungsten oxide‐based materials to further upgrade energy‐storage devices.

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“…Cyclic voltammograms of RuO 2 /C (a) and RuO 2 -Au/C nanocomposites (b) at different scan rates; galvanostatic charge-discharge curves of RuO 2 /C (c) and RuO 2 -Au/C nanocomposites (d) at different current densities; plots of specific capacitance for RuO 2 /C (e) and RuO 2 -Au/C nanocomposites (f) at different current densities; comparison of the specific capacitance for RuO 2 /C and RuO 2 -Au/C nanocomposites at current density of 200 mA g −1 (g); comparison of Nyquist plots for RuO 2 /C and RuO 2 -Au/C nanocomposites (h). Reproduced from Wang et al (2014) with the permission from the Royal Society of Chemistry Figure 7.23h shows the Nyquist plots of the RuO 2 /C and RuO 2 -Au/C nanocomposites measured by electrochemical impedance spectroscopy (EIS), which illustrate the frequency response of the electrode/electrolyte system. The more vertical the curve, the more closely the supercapacitor behaves as an ideal capacitor.…”

Section: Electrochemical Properties Of Ruo 2 /C and Ruo 2 -Au/c Nanocmentioning

confidence: 99%

“…Reproduced fromWang et al (2014) with the permission from the Royal Society of Chemistry XPS spectrum very well, indicating that the RuO 2 was the dominant product upon the decomposition of RuCl 3 -DDA complexes at elevated temperature in air.…”

mentioning

confidence: 93%

Metal-Based Composite Nanomaterials

Yang¹,

Liu²

2015

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Ruthenium oxide-based nanocomposites with high specific surface area and improved capacitance as a supercapacitor

Abstract: A solvothermal approach and a mutual oxidation–reduction strategy were demonstrated for the synthesis of RuO2-based nanocomposites for supercapacitors.

Cited by 46 publications

References 42 publications

Functionalizing Reduced Graphene Oxide with Ru‐Organometallic Compounds as an Effective Strategy to Produce High‐Performance Pt Nanocatalysts for the Methanol Oxidation Reaction

Functionalizing Reduced Graphene Oxide with Ru‐Organometallic Compounds as an Effective Strategy to Produce High‐Performance Pt Nanocatalysts for the Methanol Oxidation Reaction

Review on Recent Progress in the Development of Tungsten Oxide Based Electrodes for Electrochemical Energy Storage

Metal-Based Composite Nanomaterials

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