Synthesis of Nickel Nanoparticles with N‐Doped Graphene Shells for Catalytic Reduction Reactions

Abstract

The synthesis of novel nanoparticles is of general importance for the development of efficient heterogeneous catalysts. Herein, the preparation of carbon‐supported nickel‐based nanoparticles (NPs), modified by nitrogen‐doped graphene layers, is reported for the first time. The resulting materials were characterized in detail by TEM, X‐ray photoelectron spectroscopy (XPS), XRD, elemental analysis (EA), electron paramagnetic resonance (EPR), temperature‐programmed reduction (TPR), BET, and Raman analysis. Initial catalytic tests revealed the potential of this class of compounds in hydrogenation reactions.

Enhanced Energy Storage of Fe3O4 Nanoparticles Embedded in N‐Doped Graphene

“…In Scheme we represent the methodology of synthesis of Fe 3 O 4 nanoparticles via coprecipitation method and then Fe 3 O 4 @N‐doped graphene …”

“… Brief representation of the methodology to synthesize the Fe 3 O 4 nanoparticles via coprecipitation method following a thermal treatment in presence of 1,10 phenanthroline to finally obtain Fe 3 O 4 @N‐doped graphene …”

“…Inspired by a simple pyrolysis method to obtain nitrogen‐doped graphene shells proposed by Beller et al ., we explored the coating of Fe 3 O 4 nanoparticles with nitrogen‐doped graphene sheets, a novel method in the battery field, to be used as a negative electrode for LIB applications. Among the different Fe 3 O 4 ‐hybrid materials reported in the literature, this material had a simple and rapid method where Fe 3 O 4 nanoparticles prepared by coprecipitation were submitted to a pyrolysis process in the presence of phenanthroline.…”

Iron Nanoparticles Embedded in Graphitic Carbon Matrix as Heterogeneous Catalysts for the Oxidative C−N Coupling of Aromatic N−H Compounds and Amides

“…It has been recently reported that MNPs and metal oxides obtained by pyrolysis of metal complexes can exhibit a unique catalytic activity thanks to the favorable influence of the carbonaceous matrix surrounding the MNPs, which was formed in the process . Similarly, MNPs and metal oxides wrapped with carbon have been obtained by pyrolysis of metal organic frameworks .…”

Nickel‐Nanoparticles on Doped Graphene: A Highly Active Electrocatalyst for Alcohol and Carbohydrate Electrooxidation for Energy Production

“…Especially, N‐doping of graphene (NGr) can provide remarkable increase in conductivity and electron donor properties owing to the similar atomic size and five valence electrons that are accessible in forming valence bonds with carbon atoms. The introduction of metal nanoparticles on the surface of N‐doped graphene can provide smaller particle size and dispersion of catalyst nanoparticles, strong bonding between the nanoparticles and the support of enhanced electronic structures for the catalyst, and increased electronic conductivity for the support . Recent findings suggest that doped graphene with nitrogen based active sites may exhibit promoted electro‐catalytic activity even in the absence of precious metals ,…”