A facile and novel approach toward synthetic polypyrrole oligomers functionalization of multi-walled carbon nanotubes as PtRu catalyst support for methanol electro-oxidation

Zhao, Yi; Yang, Xiulin; Tian, Jianniao; Wang, Fengyang; Lu, Zhan

doi:10.1016/j.jpowsour.2010.02.023

Cited by 78 publications

(33 citation statements)

References 60 publications

(69 reference statements)

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“…As expected, Au 4f doublet features can be clearly observed at the Au/CAS-MWCNTs composites, confirming the presence of Au metal, and indicating that gold nanoparticles are indeed successfully attached onto the Au/CASMWCNTs composites modified electrode. The (002) diffraction peak of XRD corresponds to graphite from MWCNTs [25,36], which is consistent with the previous study [26]. The XRD results suggest that MWCNTs and gold nanoparticles still retain their crystalline structures in the AuNPs/CAS-MWCNT nanocomposites.…”

Section: Mechanism Of Formation Of Aunps/cas-mwcnt Nanocompositessupporting

confidence: 90%

Electrochemical immunosensor for prostate-specific antigen using a glassy carbon electrode modified with a nanocomposite containing gold nanoparticles supported with starch-functionalized multi-walled carbon nanotubes

et al. 2012

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We reported on a novel electrochemical immunosensor for the determination of prostate specific antigen (PSA). It is based on gold nanoparticles supported on crosslinked starch functionalized multi-walled carbon nanotubes in a nanocomposite film. The method is simple and can be carried out at room temperature without the use of expensive chemicals or corrosive acids. Thus, it preserves the integrity and the electronic structure of the nanotubes. The stepwise assembly of the electrode was characterized by cyclic voltammetry (CV) and impedance spectroscopy. CV studies demonstrated that the formation of antibody-antigen complex decreases the peak current of the hexacyanoferrate redox pair linearly with increasing PSA concentration in two ranges (0.01-0.5 and 0.5-3.0 ng·mL −1 ). The detection limit for PSA is 7 pg·mL −1 (at S/N03). This immunoassay exhibits good sensitivity and reproducibility and may become a promising technique for the diagnosis and monitoring of prostate cancer.

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Section: Mechanism Of Formation Of Aunps/cas-mwcnt Nanocompositessupporting

confidence: 90%

Electrochemical immunosensor for prostate-specific antigen using a glassy carbon electrode modified with a nanocomposite containing gold nanoparticles supported with starch-functionalized multi-walled carbon nanotubes

et al. 2012

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“…http://repository.uwc.ac.za 4 http://repository.uwc.ac.za 5 The S EAS of the catalysts was calculated by using the equation [24], S EAS = Q CO =420ðμC cm -2 Þ=w , where S EAS is the electrochemically active specific area of different catalysts; Q CO is the charge for CO desorption electrooxidation in microcoulomb (μC); 420 is the charge required to oxidize a monolayer of CO on the catalyst in microcoulomb per square centimeter, and w is the Pt loading. The S EAS of the PtRu/C and TiO 2 -PtRu/C (10 %) catalysts is 75.70 and 80.08 m 2 g −1 Pt, respectively, similar to the literature [25].…”

Section: Methodsmentioning

confidence: 99%

Nanoparticulate TiO2-promoted PtRu/C catalyst for methanol oxidation

Wang

Key

et al. 2012

Ionics

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To improve the electrocatalytic properties of PtRu/C in methanol electrooxidation, nanoparticulate TiO 2 -promoted PtRu/C catalysts were prepared by directly mixing TiO 2 nanoparticles with PtRu/C. Using cyclic voltammetry, it was found that the addition of 10 wt% TiO 2 nanoparticles can effectively improve the electrocatalytic activity and stability of the catalyst during methanol electro-oxidation. The value of the apparent activation energy (E a ) for TiO 2 -PtRu/C was lower than that for pure PtRu/C at a potential range from 0.45 to 0.60 V. A synergistic effect between PtRu and TiO 2 nanoparticles is likely to facilitate the removal of CO-like intermediates from the surface of PtRu catalyst and reduce the poisoning of the PtRu catalysts during methanol electrooxidation. Therefore, we conclude that the direct introduction of TiO 2 nanoparticles into PtRu/ C catalysts offers an improved facile method to enhance the electrocatalytic performance of PtRu/C catalyst in methanol electrooxidation. IntroductionCarbon-supported PtRu catalyst, PtRu/C, offers a state-of-the-art anode electrocatalyst for direct methanol fuel cells (DMFCs) due to its high activity toward methanol electrooxidation and tolerance to carbon monoxide poisoning [1][2][3][4][5]. Alloying Pt with Ru promotes the formation of oxygenated species at a lower temperature than Pt particles and promotes oxidation of CO to CO 2 . However, despite promising progress in the development of PtRu/C, the durability and activity of the PtRu/C anode still cannot meet the demands for practical DMFCs applications.

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“…CV curves of the composites do not exhibit redox peaks as pronouncedly as in the case of MC. This is because the π-bonded surface of the MC may interact strongly with the conjugated structure of PPy, especially through the pyrrole ring [21], or N-H of PPy can interact with the reactive hydroxyl functional groups of MC [20]. The gravimetric specific capacitance (C) of electrode is calculated according to the Eq.…”

Section: Resultsmentioning

confidence: 99%

Preparation of mesoporous carbon/polypyrrole composite materials and their supercapacitive properties

Zou¹,

Mo²,

Zhou³

et al. 2011

J. Electrochem. Sci. Eng.

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IntroductionMesoporous carbon (MC) is one of the most important carbon materials with high surface area, uniform pore size, and good electric conductivity. During the past ten years, many efforts have been made to develop simple and efficient methods for the preparation of MC materials and to improve their properties for various applications. Recently, one-step soft template methods for MC preparation have gradually replaced time-consuming and tedious two-step hard mesoporous

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A facile and novel approach toward synthetic polypyrrole oligomers functionalization of multi-walled carbon nanotubes as PtRu catalyst support for methanol electro-oxidation

Cited by 78 publications

References 60 publications

Electrochemical immunosensor for prostate-specific antigen using a glassy carbon electrode modified with a nanocomposite containing gold nanoparticles supported with starch-functionalized multi-walled carbon nanotubes

Electrochemical immunosensor for prostate-specific antigen using a glassy carbon electrode modified with a nanocomposite containing gold nanoparticles supported with starch-functionalized multi-walled carbon nanotubes

Nanoparticulate TiO2-promoted PtRu/C catalyst for methanol oxidation

Preparation of mesoporous carbon/polypyrrole composite materials and their supercapacitive properties

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