Electrocatalytic activity of Pt nanoparticles supported on novel functionalized reduced graphene oxide-chitosan for methanol electrooxidation

Ekrami‐Kakhki, Mehri‐Saddat; Farzaneh, Nahid; Abbasi, Sedigheh; Makiabadi, Batoul

doi:10.1007/s10854-017-7057-5

Cited by 17 publications

(13 citation statements)

References 47 publications

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“…The higher current density of the Pt 3D-nanoframework than JM-Pt black was presented during the entire time range. Moreover, the performance comparison of Pt 3D-nanoframework catalysts was carried out with other Pt nanoparticles synthesized in the literature, − as illustrated in Table S1. Most of these controlled trials from the reported literature are conducted under similar testing conditions.…”

Section: Resultsmentioning

confidence: 99%

Rational Design and Synthesis of Adjustable Pt and Pt-Based 3D-Nanoframeworks

Zhao

Zhang

Hao

et al. 2022

ACS Appl. Energy Mater.

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A facile, adjustable, and expandable synthetic technique to make threedimensional (3D)-nanoframework nanomaterials with super-large surface areas is of great significance in the field of electrocatalysts. In this study, spray-drying combined with thermal decomposition reduction technique is employed to synthesize singlemetal Pt, Pt-based multimetallic, and high-entropy alloy (HEA) 3D-nanoframeworks under mild conditions (at 300 °C in a H 2 atmosphere). It is found that the assynthesized Pt 3D-nanoframework shows super-large surface areas of 94.9 m 2 /g and improves electrocatalytic performance for the hydrogen evolution reaction and methanol oxidation reaction. Moreover, the addition of the Pt element could decrease the reduction temperature of other metals (Ni, Fe, Co, Cu, Ru, etc.) via the autocatalytic behavior, and thus the Pt-based multimetallic (such as PtNi, PtCo, and PtFe) and PtCoNiCuRu HEA 3D-nanoframeworks are first designed and successfully prepared with a single-phase solid solution under low thermal decomposition temperatures (300 °C) in a H 2 atmosphere.

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Section: Resultsmentioning

confidence: 99%

Rational Design and Synthesis of Adjustable Pt and Pt-Based 3D-Nanoframeworks

Zhao

Zhang

Hao

et al. 2022

ACS Appl. Energy Mater.

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“…The signi cant parameters have the sum of square value more than error. Therefore, it can be deducted that the enhancement of F-value leads to the increasing of factor's importance [28,29]. According to the Fvalues of presented factors in Table 1 and Table 2, it can be observed that all of the parameters have reasonable F-value.…”

Section: The Analysis Of Variance Studymentioning

confidence: 91%

“…The response surface method (RSM) is a three-dimensional approach for investigation of the response variation upon simultaneous in uence of two factors [28]. Fig.…”

Section: The Analysis Of Mo Degradation Rate Based On Response Surface Methodologymentioning

confidence: 99%

Improvement of photocatalytic decomposition of methyl orange by modified MWCNTs, prediction of degradation rate using statistical models

Abbasi

2021

J Mater Sci: Mater Electron

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Multi-walled carbon nanotubes (MWCNTs) have been successfully modi ed with TiO2 nanoparticles via a two-step hydrolysis technique. Firstly, the pristine MWCNTs are functionalized in nitric acid (HNO3) to creation of oxygen containing groups. Secondly, TiO2 nanoparticles are synthesized on the surface of functionalized MWCNTs through hydrolysis method. The synthesized samples have been used as photocatalyst for decomposition of methyl orange (MO) as dye organic pollutant. The characterization of samples using x-ray diffraction pattern (XRD) con rm the presence of TiO2 nanoparticles with mixture of anatase and rutile phases. Regarding the photocatalytic performance of TiO2 nanoparticles and modi ed MWCNTs with TiO2 nanoparticles, it observed that the degradation rate of MO increases by increasing the irradiation time from 5 min to 35 min. The variation of degradation rate upon pH of suspension reveals that the maximum and minimum degradation rate are in acidic (pH=3) and neutral condition (pH=7). Meanwhile, the results show that the presence of MWCNTs leads to the enhancement of degradation rate. The analysis of variance (ANOVA) results con rm that both of main factors (irradiation time and pH) and their interaction have a signi cant in uence on the degradation rate of MO. However, the effect of irradiation time is more than that of pH and their interaction. The graphical methods verify the quality and adequacy of the statistical models for prediction of the degradation rate.

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“…Different carbon-based materials including carbon nanofibers, carbon nanotubes (CNTs), mesoporous carbon, graphene, Vulcan XC-72 carbon, and reduced graphene oxide (RGO) are used as supporting materials for Pt nanoparticles 19 – 23 . RGO is recognized as an appropriate supporting material due to its chemical stability, high charge mobility, great specific surface area, and excellent electronic conductivity One of the developing procedures to modify the reduced graphene oxide is functionalization of its surface which improves its stability and activity for nanoparticles 24 , 25 .…”

Section: Introductionmentioning

confidence: 99%

Enhanced electrocatalytic activity of Pt-SnO2 nanoparticles supported on natural bentonite-functionalized reduced graphene oxide-extracted chitosan from shrimp wastes for methanol electro-oxidation

Aryafar

Ekrami‐Kakhki

Naeimi

2023

Sci Rep

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In this work, tin (IV) oxide (SnO2) nanoparticles were synthesized based on Amaranthus spinosus plant. The produced graphene oxide by a modified Hummers’ method was functionalized with melamine (mRGO) and used accompanied by natural bentonite (Bnt) and extracted chitosan from shrimp wastes to prepare Bnt-mRGO-CH. This was utilized as novel support for anchoring Pt and SnO2 nanoparticles to prepare the novel Pt-SnO2/Bnt-mRGO-CH catalyst. The crystalline structure, morphology and uniform dispersion of nanoparticles in the prepared catalyst were determined by TEM images and XRD technique. The electrocatalytic performance of the Pt-SnO2/Bnt-mRGO-CH catalyst was evaluated for methanol electro-oxidation through electrochemical investigations including cyclic voltammetry, electrochemical impedance spectroscopy, and chronoamperometry techniques. Pt-SnO2/Bnt-mRGO-CH showed enhanced catalytic activity compared to Pt/Bnt-mRGO-CH and Pt/Bnt-CH catalysts considering its higher electrochemically active surface area, higher mass activity, and better stability for methanol oxidation. SnO2/Bnt-mRGO and Bnt-mRGO nanocomposites were also synthesized and did not show any significant activity for methanol oxidation. The results showed that Pt-SnO2/Bnt-mRGO-CH could be a promising catalyst as anode material in direct methanol fuel cells.

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Electrocatalytic activity of Pt nanoparticles supported on novel functionalized reduced graphene oxide-chitosan for methanol electrooxidation

Cited by 17 publications

References 47 publications

Rational Design and Synthesis of Adjustable Pt and Pt-Based 3D-Nanoframeworks

Rational Design and Synthesis of Adjustable Pt and Pt-Based 3D-Nanoframeworks

Improvement of photocatalytic decomposition of methyl orange by modified MWCNTs, prediction of degradation rate using statistical models

Enhanced electrocatalytic activity of Pt-SnO2 nanoparticles supported on natural bentonite-functionalized reduced graphene oxide-extracted chitosan from shrimp wastes for methanol electro-oxidation

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