Superior electrocatalytic activity of Pt SrCoO3−δ nanoparticles supported on functionalized reduced graphene oxide-chitosan for ethanol oxidation

Ekrami‐Kakhki, Mehri‐Saddat; Farzaneh, Nahid; Fathi, Ehsan

doi:10.1016/j.ijhydene.2017.06.053

Cited by 13 publications

(5 citation statements)

References 67 publications

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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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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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“…It is known that platinum (Pt) metal can also be an effective catalyst for formic acid oxidation. However, the CO intermediate path occurs easily on the Pt electrocatalyst during oxidation, which considerably reduces its catalytic activity by blocking active sites 1,2,4 . This problem can be improved by preparing bimetallic catalyst surfaces with a second noble metal or metal oxide in Pt nanoparticles 4 .…”

Section: Introductionmentioning

confidence: 99%

“…However, the CO intermediate path occurs easily on the Pt electrocatalyst during oxidation, which considerably reduces its catalytic activity by blocking active sites 1,2,4 . This problem can be improved by preparing bimetallic catalyst surfaces with a second noble metal or metal oxide in Pt nanoparticles 4 . Recently, a popular method has been to prepare Pt‐based bimetallic catalysts (such as PtAu, 5 PtRu, 5,6 PtRh, 7 PtBi, 8 PtPb, 9 PtCu, 10 PtSn, 6 and PtPd 6,11–13 ) to enhance the catalytic activity for formic acid oxidation.…”

Section: Introductionmentioning

confidence: 99%

“…Graphene oxide (GO) and its derivatives are supports and can be used as supports in the preparation of polymer nanocomposites due to their unique properties. 4,14,15 Several functional groups of GO (epoxy, hydroxyl, carbonyl, and carboxyl groups) interact with the polymer on the GO surface. 16,17 Furthermore, GO offers high electrochemical reactivity and oxygen-containing groups.…”

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confidence: 99%

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Polyvinyl alcohol‐modified graphene oxide as a support for bimetallic Pt–Pd electrocatalysts to enhance the efficiency of formic acid oxidation

Saipanya

Themsirimongkon

et al. 2022

Polymers for Advanced Techs

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The aim of this research was to study the efficiency of polyvinyl alcohol (PVA)modified graphene oxide (GO) as a supporting material for catalysts that oxidize formic acid. The active metal catalysts (e.g., Pt and Pd) were electrodeposited on PVA/GO surfaces. The morphologies of the prepared catalysts were characterized by scanning electron microscopy and transmission electron microscopy, while their chemical compositions were identified by X-ray diffraction and X-ray photoelectron spectroscopy. The results show that compared with the other catalysts on GO, the prepared active PtPd alloy catalyst nanoparticles with 11.49-20.73 nm sizes were well dispersed on the PVA/GO surfaces. Electrochemical results indicate that the activities of the catalysts with PVA provided a higher current density than that of the catalysts without PVA. The bimetallic 3Pt3Pd/PVA/GO catalyst showed the greatest catalytic activity, stability, and CO oxidation when compared to those of other catalysts. The electronic, morphological, and structural properties promote the masscharge transfer through the interaction. These results indicate that the PVA-modified GO provides a suitable site for active bimetallic catalyst surfaces, resulting in excellent formic acid oxidation and high CO elimination. The 3Pt3Pd/PVA/GO electrocatalyst is promising for enhancing formic acid oxidation.

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“…To circumvent the problems associated with high cost of platinum, several approaches like finding non-noble electrocatalysts or maximizing the utilization of platinum by uniformly dispersing Pt-based particles on conductive carbon supports are documented in the literature [14][15][16][17][18][19]. Bimetallic nanoparticles with varied structures like coreshell, intermetallic (alloyed), heterostructured were believed to offer convenient electronic and geometric configurations required to achieve higher electrocatalytic efficacies towards methanol and ethanol electrooxidation [20].…”

Section: Introductionmentioning

confidence: 99%

Facile electrooxidation of ethanol on reduced graphene oxide supported Pt–Pd bimetallic nanocomposite surfaces in acidic media

et al. 2022

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Development of electrocatalysts with extended homogeneity and improved metal–support interactions is of urgent scientific need in the context of electrochemical energy applications. Herein, bimetallic Pt-Pd nanoparticles with good homogeneity are fabricated using a convenient solution phase chemical reduction method onto a reduced graphene oxide (rGO) support. X-ray diffraction studies revealed that Pt-Pd/rGO possesses the crystallite size of 3.1 nm. The efficacies of Pt-Pd/rGO catalyst (20 wt% Pt + 10 wt% Pd on rGO support, Pt:Pd atomic ratio = 1:1) towards ethanol electrooxidation reaction (EOR) are evaluated in acidic conditions by cyclic voltammetry using catalyst-coated glassy carbon electrode as a working electrode. With the better dispersion on rGO support the Pt-Pd/rGO nancomposite catalyst exhibit highest mass specific activity (0.358 mA/µg-Pt) which is observed to be 1.9 times of similarly synthesized 20 wt% Pt/rGO (0.189 mA/µg-Pt) and 2.5 times of commercial 20 wt% Pt/C (0.142 mA/µg-Pt), respectively. Apart from the observed improved EOR activity, the Pt-Pd/rGO catalyst exhibited better stability than Pt/rGO and Pt/C catalysts. Strong synergy offered by Pt, Pd and rGO support could contribute to the observed higher EOR activity of Pt-Pd/rGO.

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Superior electrocatalytic activity of Pt SrCoO3−δ nanoparticles supported on functionalized reduced graphene oxide-chitosan for ethanol oxidation

Cited by 13 publications

References 67 publications

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

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

Polyvinyl alcohol‐modified graphene oxide as a support for bimetallic Pt–Pd electrocatalysts to enhance the efficiency of formic acid oxidation

Facile electrooxidation of ethanol on reduced graphene oxide supported Pt–Pd bimetallic nanocomposite surfaces in acidic media

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