Graphite-supported ultra-small copper nanoparticles – Preparation, characterization and catalysis applications

d’Halluin, Martin; Mabit, Thibaud; Fairley, Neal; Fernandez, Vincent; Gawande, Manoj B.; Grognec, Erwan Le; Felpin, François‐Xavier

doi:10.1016/j.carbon.2015.06.017

Cited by 59 publications

(36 citation statements)

References 81 publications

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“…XPS, in particular, has been essential for the characterization of the chemistries involved with thin oxide film growth . The need for improved XPS analysis of copper spectra has also been noted with procedures recently developed to curve‐fit the full Cu 2p spectrum using standard spectra line‐shapes for graphite‐supported ultra‐small copper nanoparticles …”

Section: Introductionmentioning

confidence: 99%

Advanced analysis of copper X‐ray photoelectron spectra

Biesinger

2017

Surface & Interface Analysis

1,341

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918

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Chemical state X-ray photoelectron spectroscopic analysis of copper species is challenging because of the complexity of the 2p spectra resulting from shake-up structures for Cu(II) species and overlapping binding energies for Cu metal and Cu(I) species. This paper builds upon and extends previously published X-ray photoelectron spectroscopy curve-fitting and data analysis procedures for a wide range of copper containing species. Steps undertaken include the following: (i) an examination of existing Cu 2p 3/2 main peak and Cu 2p 3/2 -Cu L 3 M 4,5 M 4,5 Auger parameter literature data, (ii) analysis of a series of quality standard samples, (iii) curve-fitting procedures for both the Cu 2p 3/2 and the Cu L 3 M 4,5 M 4,5 spectra (as well as associated anions), (iv) calculations that determine the amount of Cu(II) species in a mixed oxidation state system, (v) calculations and necessary data for thin film mixed oxide/hydroxide thickness measurements, and (vi) a presentation of literature and standard sample values in a Wagner (chemical state) plot.

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Section: Introductionmentioning

confidence: 99%

Advanced analysis of copper X‐ray photoelectron spectra

Biesinger

2017

Surface & Interface Analysis

1,341

154

918

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“…The catalytic activity of Fe 3 O 4 @SiO 2 /EP.EN.EG.Cu was compared with various reported catalysts in the literature toward the synthesis of 1,4‐disubstituted 1,2,3‐triazoles. It was observed that Fe 3 O 4 @SiO 2 /EP.EN.EG.Cu promotes the yield of products and reaction time effectively in comparison with other catalysts.…”

Section: Resultsmentioning

confidence: 99%

Fe₃O₄@SiO₂/EP.EN.EG.Cu as a Highly Efficient and Recoverable Catalytic System for Synthesis of 1,4‐Disubstituted 1,2,3‐Triazole Derivatives via the Click Reaction

2019

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A magnetic nanostructured core–shell Fe3O4@SiO2/EP.EN.EG.Cu has used as an efficient heterogeneous catalyst for the synthesis of 1,4‐disubstituted 1,2,3‐triazole derivatives through click reaction, under mild reaction conditions. A variety of epoxides, alkyl or benzyl halides was used to afford the corresponding 1,4‐disubstituted 1,2,3‐triazoles. The catalyst could be easily separated by using an external magnet from the reaction mixture and reused seven times without significant loss of catalytic activity.

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“…CuAAC is well established as one of the most useful reactions in organic synthesis, materials science, and biomedical sciences. Recently, it has also been shown that CuNPs are active catalysts for this reaction . CuNP‐ 2 was tested here as a catalyst for AAC between benzyl azide and phenylacetylene [Eq.…”

Section: Figurementioning

confidence: 99%

Highly Efficient Transition Metal Nanoparticle Catalysts in Aqueous Solutions

et al. 2016

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Al igand design is proposed for transition metal nanoparticle (TMNP) catalysts in aqueous solution. Thus, at ris(triazolyl)-polyethylene glycol (tris-trz-PEG) amphiphilic ligand, 2,i su sed for the synthesis of very small TMNPs with Fe,C o, Ni, Cu, Ru, Pd, Ag, Pt, and Au. These TMNP-2 catalysts were evaluated and compared for the model 4-nitrophenol reduction, and proved to be extremely efficient. High catalytic efficiencies involving the use of only afew ppm metal of PdNPs,RuNPs,and CuNPs were also exemplified in Suzuki-Miyaura, transfer hydrogenation, and click reactions, respectively.Since the seminal discoveries by Haruta [1] and Hutchings, [2] catalysis of chemical reactions by transition metal nanoparticles (TMNPs) has attracted considerable interest owing to its efficiency, greenness,c onvenient use,a nd improved understanding of reaction mechanisms. [3][4][5][6][7][8][9] Thes upport and medium have been shown to play an essential role in TMNP catalysis,but relatively little attention has been paid to TMNP surface ligand design. Yetb oth TMNP formation in micelles or inverted micelles and catalysis therein are also strongly dependent on the stereoelectronic parameters of the stabilizing agents. [10][11][12][13] Catalysis in water offers great advantages in terms of green chemistry,a nd has recently been actively investigated. [14][15][16][17][18][19][20][21] Fori nstance,a mphiphilic dendrimers are unimolecular micelles, [18][19][20] and this property has recently been exploited for catalysis in water with little as parts per million (ppm) amounts of molecular or TMNP catalysts.[21] The synthesis and use in catalysis of amphiphilic dendrimers as nanoreactors represents avery productive sophistication, but it is time-consuming,a nd one can conceptualize ar elated approach using simpler amphiphilic ligands.Toward this goal, we suggest the design of weak, but multidentate bulky ligands that offer both easy displacement from TMNP surface by substrates for catalysis and sufficient TMNP stabilization. As ar esult, we report the amphiphilic tripodal ligand tris(1,2,3-triazolyl)-polyethylene glycol (tristrz-PEG), 2,t hat led to the synthesis of very small TMNPs with various transition metals (Fe, Co,Ni, Cu, Ru, Ag, Pt, Pd, and Au). These TMNP-2 complexes are shown to be remarkably efficient catalysts of several major green reactions.F irst, 4-nitrophenol (4-NP) reduction by NaBH 4 in water was used as am odel NP surface reaction to demonstrate the catalyst efficiencya nd compare all of these metals with one another. Then RuNP-catalyzed transfer hydrogenation of nitrobenzene with i-propanol as the hydrogen source in water/i-propanol, PdNP-catalyzed Suzuki-Miyaura crosscoupling reaction between bromobenzene and phenylboronic acid in water/EtOH, and CuNP-catalyzed azide-alkyne 1,3-cycloaddition (CuAAC, click) reaction in water were shown to work using extremely low amounts (down to afew ppm) of catalysts.Thes ynthesis of the tris-trz-PEG ligand 2 starts with the preparation of tris(1-benzyl-1H-1,2,3-triazo...

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Graphite-supported ultra-small copper nanoparticles – Preparation, characterization and catalysis applications

Cited by 59 publications

References 81 publications

Advanced analysis of copper X‐ray photoelectron spectra

Advanced analysis of copper X‐ray photoelectron spectra

Fe₃O₄@SiO₂/EP.EN.EG.Cu as a Highly Efficient and Recoverable Catalytic System for Synthesis of 1,4‐Disubstituted 1,2,3‐Triazole Derivatives via the Click Reaction

Highly Efficient Transition Metal Nanoparticle Catalysts in Aqueous Solutions

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Graphite-supported ultra-small copper nanoparticles – Preparation, characterization and catalysis applications

Cited by 59 publications

References 81 publications

Advanced analysis of copper X‐ray photoelectron spectra

Advanced analysis of copper X‐ray photoelectron spectra

Fe3O4@SiO2/EP.EN.EG.Cu as a Highly Efficient and Recoverable Catalytic System for Synthesis of 1,4‐Disubstituted 1,2,3‐Triazole Derivatives via the Click Reaction

Highly Efficient Transition Metal Nanoparticle Catalysts in Aqueous Solutions

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Fe₃O₄@SiO₂/EP.EN.EG.Cu as a Highly Efficient and Recoverable Catalytic System for Synthesis of 1,4‐Disubstituted 1,2,3‐Triazole Derivatives via the Click Reaction