Carbon paste electrodes modified by Pt and Pt–Ni microparticles dispersed in polyindole film for electrocatalytic oxidation of methanol

Nagashree, K. L.; Raviraj, N.H.; Ahmed, M.F.

doi:10.1016/j.electacta.2009.12.033

Cited by 60 publications

(17 citation statements)

References 39 publications

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“…The mechanism of the promoting effect of Pt-Ni alloy is based on the synergistic roles of Pt and nickel hydroxides on the surface of the catalysts and the modification of the electronic characteristics of the surface Pt atoms by Ni atoms [8,9]. A considerable amount of research on Pt-Ni alloy catalyst in acid media is reported recently [9][10][11][12][13]. With the application for alkaline anion membrane in fuel cells [14,15], Pt-Ni alloy catalysts are potentially capable of being effectively employed in methanol oxidation.…”

Section: Introductionmentioning

confidence: 98%

Pt–Ni alloy nanoparticles supported on multiwalled carbon nanotubes for methanol oxidation in alkaline media

Liang

Xia

et al. 2012

J Solid State Electrochem

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The Pt-Ni alloy nanoparticles with different Pt/Ni atomic ratios supported on functionalized multiwalled carbon nanotubes surface were synthesized via an impregnationreduction method. The nanocatalysts were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy (XPS), and electrochemical techniques. XRD demonstrated that Pt was alloyed with Ni. TEM showed that the Pt-Ni alloy nanoparticles were uniformly dispersed on the multiwalled carbon nanotubes (MWCNTs) surface, indicating appropriate amount of Ni in Pt-Ni alloy which facilitates the dispersion of nanoparticles on the MWCNT surface. XPS revealed that the Pt 4f peak in Pt-Ni/MWCNT (4:1) catalyst shifted to a lower binding energy compared with Pt/MWCNT catalyst, and nickel oxides/hydroxides such as NiO, Ni(OH) 2 , and NiOOH were on the surface of Pt-Ni nanoparticles. Electrochemical data based on cyclic voltammetry and chronoamperometric curves indicated that Pt-Ni (4:1) alloy nanoparticles exhibited distinctly higher activity and better stability than those of Pt/MWCNTs toward methanol oxidation in alkaline media.

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Section: Introductionmentioning

confidence: 98%

Pt–Ni alloy nanoparticles supported on multiwalled carbon nanotubes for methanol oxidation in alkaline media

Liang

Xia

et al. 2012

J Solid State Electrochem

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“…The electrocatalytic oxidation of small organic molecules, such as CH 3 OH, HCOOH, and HCHO, has been widely investigated for many years and continues to be of interest due to their potential utilization as fuels in fuel cells [14][15][16][17][18]. The reasons for that are related to their facility of storage and handling, and mainly their high energy density.…”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic oxidation of formaldehyde on nickel modified ionic liquid carbon paste electrode as a simple and efficient electrode

2011

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Ionic liquid 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide was used to fabricate a new ionic liquid/carbon paste electrode (IL/CPE). The general behavior of this electrode was characterized by electrochemical impedance spectroscopy, cyclic voltammetry, and scanning electron microscopy. Results showed that the IL plays an important role in improving the conductivity, reversibility, and electron transfer rate of the electrode. Nickel-modified ionic liquid/carbon paste electrode (Ni/IL/CPE) was also constructed by immersion of the IL/CPE in 1.0 M nickel sulfate solution. IL showed significant effect on the accumulation of nickel species on the surface of the electrode. The Ni/IL/CPE was applied successfully to highly efficient (current density of 16.5 mA cm -2 ) electrocatalytic oxidation of formaldehyde in alkaline medium. Cyclic voltammetry and chronoamperometry techniques indicated that this electrode displays a considerable electrocatalytic activity toward the oxidation of formaldehyde. The effects of different scan rates and formaldehyde concentrations on the electrocatalytic activity of this modified electrode were investigated. Finally, the rate constant for chemical reaction between formaldehyde and redox sites of the electrode was calculated.

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“…Recently, scientists have paid attention to the applications of CPs as electrode materials in electrochromic devices (ECDs) because CPs are capable of changing their optical properties at various voltages [4]. CPs have been extensively used for several regions, such as solar cells [5,6], catalysts [7][8][9], polymer light-emitting diodes [10][11][12], supercapacitors [13,14], sensors [15,16], and ECDs [17,18].…”

Section: Introductionmentioning

confidence: 99%

Electrosynthesis of Copolymers Based on 1,3,5-Tris(N-Carbazolyl)Benzene and 2,2′-Bithiophene and Their Applications in Electrochromic Devices

Kuo

Lee

2017

Polymers

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Poly(1,3,5-tris(N-carbazolyl)benzene) (PtnCz) and three copolymers based on 1,3,5-tris(N-carbazolyl)benzene (tnCz) and 2,2 -bithiophene (bTp) were electrochemically synthesized. The anodic P(tnCz1-bTp2) film with a tnCz/bTp feed molar ratio of 1/2 showed four colors (light orange at 0.0 V, yellowish-orange at 0.7 V, yellowish-green at 0.8 V, and blue at 1.1 V) from the neutral state to oxidized states. The optical contrast (∆T%) and coloration efficiency (η) of the P(tnCz1-bTp2) film were measured as 48% and 112 cm 2 ·C −1 , respectively, at 696 nm. Electrochromic devices (ECDs) based on PtnCz, P(tnCz1-bTp1), P(tnCz1-bTp2), P(tnCz1-bTp4), and PbTp films as anodic polymer layers and poly (3,4-dihydro-3,3-dimethyl-2H-thieno[3,4-b-1,4]dioxepin) (PProDOT-Me 2 ) as cathodic polymer layers were assembled. P(tnCz1-bTp2)/PProDOT-Me 2 ECD showed three various colors (saffron yellow, yellowish-blue, and dark blue) at potentials ranging from −0.3 to 1.5 V. In addition, P(tnCz1-bTp2)/PProDOT-Me 2 ECD showed a high ∆T% value (40% at 630 nm) and a high coloration efficiency (519 cm 2 ·C −1 at 630 nm).

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Carbon paste electrodes modified by Pt and Pt–Ni microparticles dispersed in polyindole film for electrocatalytic oxidation of methanol

Cited by 60 publications

References 39 publications

Pt–Ni alloy nanoparticles supported on multiwalled carbon nanotubes for methanol oxidation in alkaline media

Pt–Ni alloy nanoparticles supported on multiwalled carbon nanotubes for methanol oxidation in alkaline media

Electrocatalytic oxidation of formaldehyde on nickel modified ionic liquid carbon paste electrode as a simple and efficient electrode

Electrosynthesis of Copolymers Based on 1,3,5-Tris(N-Carbazolyl)Benzene and 2,2′-Bithiophene and Their Applications in Electrochromic Devices

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