Synthesis and stabilization of metal nanocatalysts for reduction reactions – a review

Hu, Huawen; Xin, John Haozhong; Hu, Hong; Wang, Xiaowen; Miao, Dagang; Liu, Yang

doi:10.1039/c5ta00753d

Cited by 286 publications

(168 citation statements)

References 199 publications

(240 reference statements)

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“…The catalytic capability of the obtained MXene@AuNPs nanocomposites was evaluated by the catalytic hydrogenation reaction of nitro-compounds [64]. In this study, the reduction of 2-NA (2 mL, 5 mmol L ) with fresh aqueous NaBH 4 (20 mL, 0.01 mol L −1 ) at room temperature was performed to investigate the catalytic activity of the composite MXene@AuNPs20, as monitored by UV-vis spectroscopy.…”

Section: Catalytic Performances Of Mxene@aunps Compositesmentioning

confidence: 99%

Fabrication of tunable hierarchical MXene@AuNPs nanocomposites constructed by self-reduction reactions with enhanced catalytic performances

et al. 2018

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Section: Catalytic Performances Of Mxene@aunps Compositesmentioning

confidence: 99%

Fabrication of tunable hierarchical MXene@AuNPs nanocomposites constructed by self-reduction reactions with enhanced catalytic performances

et al. 2018

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“…Such type of reaction catalyzed by novel metal particles has been comprehensively reported as this reaction can be easily monitored by UV-visible spectroscopy Hervés et al 2012;Hu et al 2015;Krishna et al 2016;Majumdar et al 2016). Figure S1 shows representative time-dependent UV-visible absorption spectra of reduction of 4-NP in the presence of NaBH 4 .…”

Section: -Nitrophenol (4-np) Reduction Studiesmentioning

confidence: 95%

Mussel inspired green synthesis of silver nanoparticles-decorated halloysite nanotube using dopamine: characterization and evaluation of its catalytic activity

et al. 2018

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Naturally occurring ceramic tubular clay, Halloysite nanotubes (HNTs), having a significant amount of surface hydroxyls has been coated by self-polymerized dopamine in this work. The polydopamine-coated HNTs acts as a self-reducing agent for Ag + ion to Ag 0 in nanometer abundance. Herein, nano size Ag 0 deposited on solid support catalyst has been used to mitigate water pollution within 10 min. To establish the versatility of the catalyst, nitroaryl (4-nitrophenol) and synthetic dye (methylene blue) have been chosen as model pollutant. The degradation/reduction of the aforementioned pollutants was confirmed after taking UV-visible spectra of the respective compounds. All the study can make sure that the catalyst is green and the rate constant value for catalytic reduction of 4-nitrophenol and methylene blue was calculated to be 4.45 × 10 −3 and 1.13 × 10 −3 s −1 , respectively, which is found to be more efficient in comparison to other nanostructure and commercial Pt/C nanocatalyst (1.00 × 10 −3 s −1 ).

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“…For instance, nanotitania can be used to seal aluminum oxide for corrosion resistance and UV-protection by virtue of the commonly-known physiochemical stability and UVshielding performance of the nanotitania [42,43]. However, it remains a great challenge to use nanotitania as a hole sealing material for AAO film [23][24][25][26][27][28][29][30][31][32][33][34] This study aims to grow a layer of nanotitania film for the purpose of sealing the holes of the AAO film on the aluminum alloy.…”

Section: Introductionmentioning

confidence: 99%

“…A large number of methods have been employed to prepare the titania film primarily based on the vapor phase, liquid phase, solgel, precipitation, and electrical deposition [21,22,[25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43]. In this study, an anodic oxidation method was adopted for deposition of nanotitania under alternating voltage conditions, leading to the generation of a composite film.…”

Section: Introductionmentioning

confidence: 99%

Sealing Holes of an Anodic Aluminum Oxide Alloy by Nanotitania for Enhanced Corrosion Resistance

Chang¹,

Wei²,

Chen³

et al. 2017

Nano Res Appl

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This study aims to explore an effective, novel, and environmentally friendly method that overcomes the limitations and shortcomings existing in the traditional approaches for sealing holes on aluminum alloy. Herein, the holesealing treatment of an Anodic Aluminum Oxide (AAO) alloy film using two types of titanium sources with a high stability in aqueous electrolytes, that is, ammonium fluorotitanate and titanium potassium oxalate, to electrically deposit nanotitania on the film surface was investigated. The nanotitania deposited electrochemically for hole sealing has the advantages of the high physiochemical stability, low cost, and non-toxicity, which can thus readily improve the corrosion resistance of the sealed AAO in an environmentally friendly manner. Such sealed AAO can also result in a UV-shielding performance due to the commonly-known UV absorption properties of nanotitania. The hole sealing effect is also compared between the two systems involving the two types of titanium sources at different concentrations, voltages and time. The optimization of the preparation conditions is achieved by means of weight loss measurements. Potentiodynamic scan and electrochemical impedance spectroscopy results reveal that the hole-sealed sample-based on ammonium fluorotitanate shows a higher corrosion resistance as compared to the one based on titanium potassium oxalate. Significantly, the optimal conditions for the hole sealing of the aluminum alloy are evidenced to be the concentration of ammonium fluorotitanate of 0.1 mol/L, AC voltage of 3 V, and time of 900 s.

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Synthesis and stabilization of metal nanocatalysts for reduction reactions – a review

Abstract: A review of stabilizing systems for metal nanocatalysts, such as surfactants, complexants, polymers, SiO2, Fe3O4, graphene materials, and combined components thereof.

Cited by 286 publications

References 199 publications

Fabrication of tunable hierarchical MXene@AuNPs nanocomposites constructed by self-reduction reactions with enhanced catalytic performances

Fabrication of tunable hierarchical MXene@AuNPs nanocomposites constructed by self-reduction reactions with enhanced catalytic performances

Mussel inspired green synthesis of silver nanoparticles-decorated halloysite nanotube using dopamine: characterization and evaluation of its catalytic activity

Sealing Holes of an Anodic Aluminum Oxide Alloy by Nanotitania for Enhanced Corrosion Resistance

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