Bimetallic Au-Cu alloy nanoparticles on reduced graphene oxide support: Synthesis, catalytic activity and investigation of synergistic effect by DFT analysis

Treatment of phenol by catalytic wet air oxidation: a comparative study of copper and nickel supported on γ-alumina, ceria and γ-alumina–ceria

“…Finally, the surface plasmon resonance was exhibited in the three reduced materials, with a band located at a maximum in a range of 640-700 nm, which conrmed Cu species reached the zero valence state with the thermal treatment of 600 C in H 2 atmosphere. 68 With regard to the surface plasmon band for the CuAlCe red, an intense broad band was observed, on the other hand those of CuAl red and CuCe red are less intense and shorter. Fig.…”

A facile synthesis methodology for preparation of Ag–Ni-reduced graphene oxide: a magnetically separable versatile nanocatalyst for multiple organic reactions and density functional study of its electronic structures

“…1,2,6,7 Several researchers have reported the application of graphene or Reduced Graphene Oxide (RGO) as the support to construct heterogeneous catalysts, where catalytically active sites are immobilized on the surface of graphene or RGO sheets. [6][7][8][9][10][11] However, to the best of our knowledge, to date, the development of graphene-based catalysts, which can exhibit versatile high catalytic activity towards multiple organic reactions as well as easy magnetic recovery from reaction mixtures, is limited. 10,12 To develop an efficient, but versatile and magnetically separable catalyst, we have synthesized the catalysts which are composed of varying amounts of Ag, Ni nanoparticles, and RGO.…”

“…10,11,14,16 Moreover, several researchers have investigated the reduction of 4-NP to 4-AP as a model reaction to evaluate the catalytic activity of variety of nanostructured catalysts because this reaction is easy to perform, convincing, and trustworthy for this purpose. 8,9,11,13,14,16 (ii) A3 coupling reaction: this reaction can be used to synthesize propargylamines through a one-pot reaction using the combination of three starting materials (e.g. aldehyde, amine, and alkyne).…”

Facile Aqueous-Phase Synthesis of Bimetallic (AgPt, AgPd, and CuPt) and Trimetallic (AgCuPt) Nanoparticles

“…Firstly, the electronic structure of the multi-metallic particles can be modulated repeatedly, due to different binding forces on electrons between various metal atoms, thus enhancing their catalytic performance in catalysis [6,7]. Secondly, the synergistic effect is probably brought about by the appropriate combination of metals and the atomic ratio of various metals, eventually attaining high catalytic efficiency, including high catalytic activity and high selectivity [8][9][10][11]. For example, Kim and co-workers showed that AuCu alloy nanoparticles exhibited better catalytic activity than Au or Cu in the electrochemical reduction of carbon dioxide, because the alloy nanoparticles changed surface composition, thus affecting the d-band and atomic arrangement at the active sites [10].…”