scholarly journals Ultrafast Detection of Low Acetone Concentration Displayed by Au-Loaded LaFeO3 Nanobelts owing to Synergetic Effects of Porous 1D Morphology and Catalytic Activity of Au Nanoparticles

ACS Omega ◽  
2019 ◽  
Vol 4 (21) ◽  
pp. 19018-19029 ◽  
Author(s):  
Katekani Shingange ◽  
Hendrik Swart ◽  
Gugu H. Mhlongo
Keyword(s):  
Catalytic Activity ◽  
Au Nanoparticles ◽  
Acetone Concentration ◽  
Synergetic Effects ◽  
Ultrafast Detection

scholarly journals Terpyridine-based Pd(ii)/Ni(ii) organometallic framework nano-sheets supported on graphene oxide—investigating the fabrication, tuning of catalytic properties and synergetic effects

RSC Advances ◽  
2020 ◽  
Vol 10 (39) ◽  
pp. 23080-23090 ◽  
Author(s):  
Ruirui Ren ◽  
Sa Bi ◽  
Linhong Wang ◽  
Wuduo Zhao ◽  
Donghui Wei ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Catalytic Activity ◽  
Synergistic Effect ◽  
Catalytic Properties ◽  
Synergetic Effects

The synergistic effect between Ni and Pd atom was the crucial factor for enhancing catalytic activity.

scholarly journals Highly active catalysts of iron-based materials with Au nanoparticles for soot oxidation

2019 ◽  
Vol 136 ◽  
pp. 06029
Author(s):  
Chao Wei ◽  
Zhenzhen Chen ◽  
Chao Hu ◽  
Haitao Wang
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Transition Metal ◽  
Metal Oxide ◽  
Au Nanoparticles ◽  
Soot Oxidation ◽  
Transition Metal Oxide ◽  
Initial Oxidation ◽  
Highly Active ◽  
Iron Based

Gold nanoparticles supported on transition metal oxide catalysts have been prepared by deposition-precipitation. Their catalytic activity with or without Au doped has been tested for soot oxidation. Au improves the catalytic activity of transition metal oxide for the oxidation of soot particles. Under the catalysis of Au/Co3O4, the initial oxidation temperature of soot is 354 ℃.

scholarly journals The Sintering of Au Nanoparticles on Flat {100}, {111} and Zigzagged {111}-Nanofacetted Structures of Ceria and Its Influence on Catalytic Activity in CO Oxidation and CO PROX

2020 ◽  
Author(s):  
O. S. Bezkrovnyi ◽  
P. Kraszkiewicz ◽  
W. Mista ◽  
L. Kepinski
Keyword(s):  
Electron Microscopy ◽  
Thermal Stability ◽  
Catalytic Activity ◽  
Beneficial Effect ◽  
Co Oxidation ◽  
Au Nanoparticles ◽  
Ceria Support ◽  
Ceria Catalysts ◽  
Thermal Stability Of

Abstract The thermal stability of Au nanoparticles on ceria support of various morphology (nanocubes, nanooctahedra, and {111}-nanofacetted nanocubes) in oxidizing and reducing atmospheres was investigated by electron microscopy. A beneficial effect of the reconstruction of edges of ceria nanocubes into zigzagged {111}-nanofacetted structures on the inhibition of sintering of Au nanoparticles was shown. The influence of different morphology of Au particles on various ceria supports on the reducibility and catalytic activity in CO oxidation, and CO PROX of Au/ceria catalysts was also investigated and discussed. It was shown, that ceria nanocubes with flat {110} terminated edges are more suitable as a support for Au nanoparticles, used to catalyze CO oxidation, than zigzagged {111}- nanofacetted structures. Graphic Abstract

Improving catalytic activity of supported Au nanoparticles depending on its density

2017 ◽  
Vol 427 ◽  
pp. 18-24 ◽  
Author(s):  
Chunjin Li ◽  
Zhen Wang ◽  
Qiang Li ◽  
Liangyi Peng ◽  
Weiqiang Zhang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Au Nanoparticles

scholarly journals Catalytic performance of Ag, Au and Ag-Au nanoparticles synthesized by lichen extract

2018 ◽  
Vol 7 (5) ◽  
pp. 433-440 ◽  
Author(s):  
Zafer Çıplak ◽  
Ceren Gökalp ◽  
Bengü Getiren ◽  
Atila Yıldız ◽  
Nuray Yıldız
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Fourier Transform ◽  
Catalytic Activity ◽  
Au Nanoparticles ◽  
Bimetallic Nanoparticles ◽  
Catalytic Performance ◽  
Catalytic Activities ◽  
Transmission Electron ◽  
Vis Spectroscopy

Abstract In the present study, the green chemistry approach for the biosynthesis of Ag, Au and Ag-Au bimetallic nanoparticles (NPs) was applied using lichen extract [Cetraria islandica (L.) Ach.]. The lichen extract acts both as a reducing and stabilizing agent. The monometallic and bimetallic NPs were characterized by transmission electron microscopy (TEM), ultraviolet-visible (UV-Vis) spectroscopy and Fourier transform infrared (FTIR) spectroscopy. The results showed that NPs were successfully synthesized and the prepared structures were generally spherical. The synthesized nanostructures exhibited excellent catalytic activities towards reduction of nitrophenols (4-nitrophenol; 4-NP) to aminophenols (4-aminophenol; 4-AP) with sodium borohydride (NaBH4). It was determined that bimetallic NPs exhibit more effective catalytic activity than monometallic Ag and Au nanostructures. This is the first report on 4-NP reduction with Ag, Au and Au-Ag NP catalysts prepared by lichen extract.

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