Electrocatalytic performance of environmentally friendly synthesized gold nanoparticles towards the borohydride electro-oxidation reaction

Gasparotto, Luiz H. S.; Garcia, Amanda C.; Gomes, Janaina F.; Tremiliosi‐Filho, Germano

doi:10.1016/j.jpowsour.2012.06.064

Cited by 45 publications

(29 citation statements)

References 41 publications

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“…Gasparotto et al investigated on the electrocatalytic activity of AuNPs for the borohydride oxidation where the polyvinyl pyrrolidone (PVP) protected colloidal AuNPs were obtained through the reduction of Au 3+ by glycerol in alkaline medium. 168 They concluded looking at the SPR band position which did not vary with increasing the glycerol concentration that the size and distribution of AuNPs were approximately similar.…”

Section: Uv-vis Spectroscopymentioning

confidence: 99%

Characterisation of gold catalysts

et al. 2016

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Au-based catalysts have established a new important field of catalysis, revealing specific properties in terms of both high activity and selectivity for many reactions. However, the correlation between the morphology and the activity of the catalyst is not always clear although much effort has been addressed to this task. To some extent the problem relates to the complexity of the characterisation techniques that can be applied to Au catalyst and the broad range of ways in which they can be prepared. Indeed, in many reports only a few characterization techniques have been used to investigate the potential nature of the active sites. The aim of this review is to provide a critical description of the techniques that are most commonly used as well as the more advanced characterization techniques available for this task. The techniques that we discuss are (i) transmission electron microscopy methods, (ii) X-ray spectroscopy techniques, (iii) vibrational spectroscopy techniques and (iv) chemisorption methods. The description is coupled with developing an understanding of a number of preparation methods. In the final section the example of the supported AuPd alloy catalyst is discussed to show how the techniques can gain an understanding of an active oxidation catalyst.

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Section: Uv-vis Spectroscopymentioning

confidence: 99%

Characterisation of gold catalysts

et al. 2016

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“…The Ag/C material was used as electrocatalyst for the oxygen reduction reaction. This team also described the synthesis of AuNPs applying the same strategy to that described for silver‐based materials, starting from AuCl 3 63. The Au/C electrocatalytic material was efficiently used in the oxidation of borohydride to give borate.…”

Section: Metal Nanoparticlesmentioning

confidence: 99%

Glycerol as Suitable Solvent for the Synthesis of Metallic Species and Catalysis

Chahdoura¹,

Favier²,

Gómez³

2014

Chemistry A European J

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This Minireview considers the foremost reported works involving glycerol as a solvent in the synthesis of organometallic complexes and metallic nanoparticles. This analysis highlights their catalytic applications. A special emphasis is devoted to the ability of glycerol to immobilize nanometric species, which, in turn, enables an efficient recycling of the catalytic phase to give metal-free organic products.

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“…The production of AuNps was carried out according to a previously reported method [19]. Briefly, a glycerol/NaOH (Sigma-Aldrich, St. Louis, MO, USA) solution was added to AuCl 3 /PVP (Sigma-Aldrich, 99%; Sigma-Aldrich, 10,000) solution with magnetic stirring, to yield the following final concentrations: 1.0 mmol/L Au 3+ , 0.10 mol/L NaOH, 0.10 mol/L glycerol, and 10 g/L PVP.…”

Section: Synthesis Of Gold Nanoparticles (Aunps) Stabilized By Polivymentioning

confidence: 99%

Effect of Gold Nanoparticle on 5-Fluorouracil-Induced Experimental Oral Mucositis in Hamsters

et al. 2020

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Background: Oral mucositis (OM) is a severe inflammation of the oral mucosal cells associated with chemotherapy and/or radiotherapy-induced toxicity, resulting in epithelial ulcers and higher risk of death from sepsis. The aim of the present study was to evaluate the nanoparticle (AuNp) effect on OM induced in hamsters. Materials and methods: 5-fluorouracil (5FU) was used on the first and second day of the experimental model in Golden sirian hamsters, and on the fourth day, mechanical trauma was applied to induce OM. The animals were divided into groups, i.e., polyvinylpyrrolidone (PVP), mechanical trauma (MT), 5FU, and groups treated with gold nanoparticles (AuNps) (62.5, 125, and 250 μg/kg). On the 10th day, animals were euthanized for macroscopic, histopathological, immunohistochemical, western blot, quantitative polymerase chain reaction (qRT-PCR), and AuNp quantification. Results: AuNp (250 μg/kg) reduced TNF-α, IL-1β, COX-2, NF-κB, TGF-β, and SMAD 2/3; increased glutathione levels; decreased the expression of Kelch ECH-associated protein 1 (KEAP1); and induced heme oxygenase 1 (HMOX-1) and NAD (P) H quinone oxidoreductase 1 (NQO1) genes. Conclusions: AuNp (250 μg/kg) prevented 5-FU-induced OM in hamsters and improved the parameters of inflammation and oxidative stress.

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Electrocatalytic performance of environmentally friendly synthesized gold nanoparticles towards the borohydride electro-oxidation reaction

Cited by 45 publications

References 41 publications

Characterisation of gold catalysts

Characterisation of gold catalysts

Glycerol as Suitable Solvent for the Synthesis of Metallic Species and Catalysis

Effect of Gold Nanoparticle on 5-Fluorouracil-Induced Experimental Oral Mucositis in Hamsters

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