Preparation, characterization and electrocatalytic activity for oxygen reduction reaction in PEMFCs of bimetallic PdNi nanoalloy

Zeid, E. F. Abo; Ibrahem, Ismail

doi:10.1007/s40243-017-0103-7

Cited by 4 publications

(2 citation statements)

References 38 publications

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“…Where D is the crystallite size in nm evaluated from the (−111) diffraction plain, XRD data (figure 1), and ρ is the CuO density (6.49 g cm −3 ). This equation is acquired, as debated in [29]. To determine the degree of disorders inside the matrix crystal, the dislocation density (δ), was estimated from the equation:…”

Section: Resultsmentioning

confidence: 99%

Study the influence of silver and cobalt on the photocatalytic activity of copper oxide nanoparticles for the degradation of methyl orange and real wastewater dyes

Zeid

Ibrahem

Mohamed

et al. 2020

Mater. Res. Express

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CuO (S1) Single pure component nanoparticles (SPCNPs), Ag/CuO (S2) binary component hybrid nanoparticles (BCHNPS), Co1/Ag/CuO (S3), and Co2/Ag/CuO (S4) ternary component hybrid nanoparticles (TCHNPS) were synthesized via co-precipitation method. Several spectroscopic methods investigated the characterization of the prepared catalysts. Based on Crystal properties, CuO exhibit a monoclinic phase (tenorite); the grain size of the prepared samples was 28.15 nm, 29.42 nm, 27.86 nm, and 26.67 nm for S1, S2, S3, and S4 respectively. The addition of different content from Co as a dopant to silver decorated CuO gives a clear change to a flake shape. The presence of the IR absorption peaks in the region 400-600 cm −1 matched to the distinctive stretching vibrations of Cu-O bonds in the monoclinic phase structure of CuO. Disappearance of the Raman peaks of CuO and appearing of the new characteristic peaks of cobalt oxide confirms the doping process. Using DRS analysis, arrange of the bandgap values were S1 > S2 > S3 > S4. For the synthetic methyl orange and raw industrial dye, the photodegradation parameters were measured. The results show the excellent activity of Co2/Ag/CuO NPS compared with other samples. Electrical studies of the catalysts show a higher value for the dielectric constant in the higher and lower frequency regions for the sample S4. The hopping process of the charge carrier's improving as a result of the increase of applied field frequency which leads to an increase in the material conductivity.

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Section: Resultsmentioning

confidence: 99%

Study the influence of silver and cobalt on the photocatalytic activity of copper oxide nanoparticles for the degradation of methyl orange and real wastewater dyes

Zeid

Ibrahem

Mohamed

et al. 2020

Mater. Res. Express

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“…However, it is widely known the high cost of this metal; thus, several strategies are sought to replace it [11][12][13]. There has been a huge increment of papers dealing with alternatives to Pt, like the use of other noble metals like Pd, Ag, Au and/or their alloys [14][15][16][17][18][19][20] or the use of non-noble metal catalysts, usually based on transition metals disperse onto a carbon matrix (phthalocyanines, ferrocenes, Co-based catalysts, doped-graphene, etc.) [12,[21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Titanium–tantalum oxide as a support for Pd nanoparticles for the oxygen reduction reaction in alkaline electrolytes

Alegre

Siracusano

Modica

et al. 2018

Mater Renew Sustain Energy

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We report a facile synthetic method for the preparation of titanium-tantalum oxide by means of a modified Adam's method. This new method allowed obtaining Ti 0.8 Ta 0.2 O 2 with a high surface area (234 m 2 g −1 ), to be used as catalyst support for Pd nanoparticles. Cyclic voltammetry and linear sweep voltammetry measurements confirm the noticeable oxygen reduction reaction (ORR) activities of the Pd/Ti 0.8 Ta 0.2 O 2 electrocatalyst in alkaline electrolytes, along with a high-selectivity towards a 4e − pathway. The good ORR performance for the Pd/Ti 0.8 Ta 0.2 O 2 could arise from both the strong metal-support interaction and the contribution of the Ti 0.8 Ta 0.2 O 2 in facilitating the ORR process, acting as co-catalyst. However, the stability of this catalyst seems insufficient for practical applications.

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Synthesis and Thermal Treatment of Pd-Cr@Carbon for Efficient Oxygen Reduction Reaction in Proton-Exchange Membrane Fuel Cells

Mebed

Zeid

Abd‐Elnaiem

2021

J Inorg Organomet Polym

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A nanostructured PdCr@carbon catalyst is deposited on a supported carbon surface using the modified polyol reduction method for the oxygen reduction reaction (ORR) for the application in the proton exchange membrane fuel cell. The crystal structure and feature nanostructure of the PdCr@carbon were established using the XRD and TEM, while their catalytic activity was studied using the cyclic voltammetry and electrochemical polarization techniques. The estimated average crystallite size of PdCr is increased with the calcination temperature from 9.66 to 37.54 nm as the calcination temperature increased to 973 K, while the annealing time slightly affects the crystallite size. The TEM examination reveals the uniform distribution of the PdCr nanoparticles upon the carbon surface. The calcination temperature and time play an important factor in controlling the structural and morphology parameters of PdCr@carbon and the optimum activity and chemical stability were observed for samples calcined at 573 K for 3 h.

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Preparation, characterization and electrocatalytic activity for oxygen reduction reaction in PEMFCs of bimetallic PdNi nanoalloy

Cited by 4 publications

References 38 publications

Study the influence of silver and cobalt on the photocatalytic activity of copper oxide nanoparticles for the degradation of methyl orange and real wastewater dyes

Study the influence of silver and cobalt on the photocatalytic activity of copper oxide nanoparticles for the degradation of methyl orange and real wastewater dyes

Titanium–tantalum oxide as a support for Pd nanoparticles for the oxygen reduction reaction in alkaline electrolytes

Synthesis and Thermal Treatment of Pd-Cr@Carbon for Efficient Oxygen Reduction Reaction in Proton-Exchange Membrane Fuel Cells

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