Pd nanonetwork decorated on rGO as a high-performance electrocatalyst for ethanol oxidation

Yazdan-Abad, Mehdi Zareie; Noroozifar, Meissam; Alfi, Nafiseh; Modarresi‐Alam, Ali Reza; Saravani, Hamideh

doi:10.1016/j.apsusc.2018.07.201

Cited by 29 publications

(12 citation statements)

References 26 publications

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“…However, compared to direct methanol fuels (DMFCs), direct ethanol fuel cells (DEFCs) have been considered a more appealing candidate due to higher energy density, lower toxicity, volatility, and crossover rate [8]. Moreover, ethanol could be produced from a wide variety of renewable sources [9]. Despite these potential advantages, low electrocatalytic activity and the high cost of anode catalyst for ethanol oxidation are of great significance [10].…”

Section: Introductionmentioning

confidence: 99%

Electrooxidation behavior of ethanol toward carbon microbead-encapsulated ZnO particles derived from coffee waste

Ghouri

Elsaid

Abdel‐Wahab

et al. 2020

J Mater Sci: Mater Electron

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Carbon microbead-encapsulated ZnO (CM-ZnO) particles have been synthesized from the spent coffee ground (SCG) by chemical activation with ZnCl 2 followed by calcination at 700 ℃ in N 2 environment. Interestingly, ZnCl 2 can act as an activating agent as well as a precursor for ZnO particles. The structure of the core and shell of the CM-ZnO was investigated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) techniques. Moreover, X-ray diffraction (XRD) and energy-dispersive spectroscopy (EDS) studies confirmed the presence of the encapsulated ZnO particles. The Brunauer-Emmett-Teller (BET) and Barrett-Joyner-Halenda (BJH) plots showed a well-developed porous structure with a specific surface area of 210 m 2 /g, average pore volume of 1.12 cm 3 /g, and an average pore radius of 31.7 Å. The electrooxidation behavior of ethanol toward the synthesized CM-ZnO was then studied using cyclic voltammetry (CV) technique. For comparison, two types of modified electrodes were prepared: the first one with the non-activated SCG and the second one with the CM-ZnO. The electrochemical measurements of the prepared CM-ZnO demonstrated higher electrocatalytic activity with a current density of ~ 35 mA/cm 2 at 0.4 V vs. Ag/AgCl for ethanol electrooxidation in an alkaline medium. The electrochemical measurements specified that the presence of ZnO particles and the high surface area of the activated sample have a significant influence on electrooxidation activity. Therefore, the introduced CM-ZnO particles could be an alternative and effective non-precious electrocatalyst for ethanol electrooxidation.

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Section: Introductionmentioning

confidence: 99%

Electrooxidation behavior of ethanol toward carbon microbead-encapsulated ZnO particles derived from coffee waste

Ghouri

Elsaid

Abdel‐Wahab

et al. 2020

J Mater Sci: Mater Electron

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“…Electrochemically active surface area (ECSA) is used as an important parameter to evaluate the performance of electrocatalysts which can be calculated from the area of the reduction peak of PdO. [ 21 ] The ECSA of Pd, Ir‐SAs/Pd and commercial Pd/C are shown in Figure 4b. ECSA can be calculated using the equation of ECSA = Q /(0.405 × m ).…”

Section: Resultsmentioning

confidence: 99%

Ir Single Atoms Doped Cuboctahedral Pd for Boosted Methanol Oxidation Reaction

Wei

Zhang

Liu

et al. 2022

Part & Part Syst Charact

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The construction of binary metal Pd‐based catalysts is an effective strategy to enhance the activity of methanol oxidation reaction. Herein, atomically dispersed Ir single atoms doped to cuboctahedral Pd nanoparticles (Ir‐SAs/Pd) as efficient catalysts for alkaline methanol oxidation are prepared via a simple chemical reduction method. The synthetic Ir‐SAs/Pd catalysts exhibit the outstanding mass activity of about 1717.3 mA mgPd−1 compared with pure Pd and commercial Pd/C in electrooxidation for methanol. Meanwhile, the introduction of Ir single atoms enhances the CO tolerance of Pd nanoparticles to a large extent. On the basis of density functional theory results, the enhanced catalytic performance and CO tolerance rely on the effective improvement of the electron dominance near Fermi level and the negative shift of the d‐band center for Pd as a result of the electron redistribution between Pd and Ir atoms. This article will provide new insight into the design of high‐performance binary metal catalysts for methanol oxidation in alkaline media.

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“…GO is a well‐known monolayers of carbon atoms with the large surface area. The common method for the preparation of GO is the graphite oxidation . Oxidation of graphite causes the creation of the oxygen‐containing functional groups on its surface such as hydroxyl, epoxide, and carboxyl groups.…”

Section: Resultsmentioning

confidence: 99%

Preparation and characterization of polyvinyl alcohol/β‐cyclodextrin/GO‐Ag nanocomposite with improved antibacterial and strength properties

Pooresmaeil

Namazi

2018

Polymers for Advanced Techs

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In this work, new hydrogel films based on polyvinyl alcohol (PVA) and β-cyclodextrin (β-CD) were prepared with the aim of studying their ability as an antibacterial and drug carrier system. Gallic acid (GA) was used as an antibacterial drug which was encapsulated into the β-CD cavity, and finally, β-CD inclusion complex (GA/βCD-IC) was prepared. On the other hand, silver nanoparticles (AgNPs) were synthesized on the graphene oxide (GO) surface (GO-Ag), and the obtained GO-Ag was used to enhance the antibacterial properties and mechanical strength of their films. FT-IR and DSC analysis approved the formation of cross-linking with glutaraldehyde between the PVA and β-CD. Hydrogel films were characterized using XRD and SEM. The disc diffusion method showed the antibacterial activity for the films containing GO-Ag and GA. Due to the good strength, elasticity, WVP, and swelling ability, PVA/GA/βCD-IC/GO-Ag can be proposed as a potential antibacterial drug delivery system.

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Pd nanonetwork decorated on rGO as a high-performance electrocatalyst for ethanol oxidation

Cited by 29 publications

References 26 publications

Electrooxidation behavior of ethanol toward carbon microbead-encapsulated ZnO particles derived from coffee waste

Electrooxidation behavior of ethanol toward carbon microbead-encapsulated ZnO particles derived from coffee waste

Ir Single Atoms Doped Cuboctahedral Pd for Boosted Methanol Oxidation Reaction

Preparation and characterization of polyvinyl alcohol/β‐cyclodextrin/GO‐Ag nanocomposite with improved antibacterial and strength properties

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