Confined synthesis of three-dimensionally ordered arrays of multilamellar silica nanoparticles as a gold catalyst support

RSC Advances ◽  
2016 ◽  
Vol 6 (104) ◽  
pp. 102258-102263 ◽  
Author(s):  
Shujun Zhou ◽  
Xinlei Yao ◽  
Tongxiang Fan
Keyword(s):  
Catalytic Activity ◽  
Silica Nanoparticles ◽  
Gold Catalyst ◽  
Catalyst Support ◽  
Three Dimensional ◽  
Ordered Arrays ◽  
Supported Gold

Three-dimensional arrays of multilamellar silica nanoparticles are prepared through confined synthesis and enhance the catalytic activity of supported gold.

Preparation, Characterization and Catalytic Activity of Highly Dispersed Gold Catalyst

2014 ◽  
Vol 875-877 ◽  
pp. 304-307 ◽  
Author(s):  
Chun Xiu Liu ◽  
Mei Lin Jia ◽  
Yu Hong Bao ◽  
Jiang Wang ◽  
Sagala ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Gluconic Acid ◽  
Reduction Method ◽  
Gold Catalyst ◽  
Buffer Solution ◽  
Supported Gold Catalysts ◽  
Highly Dispersed ◽  
Supported Gold ◽  
Oxidation Of Glucose ◽  
Dispersed Gold

Highly dispersed supported gold catalysts have been prepared by solution reduction method using L-lysine as protection agents, and their catalytic activity was evaluated by the liquid phase catalytic oxidation reaction of glucose to gluconic acid. The results suggested that the Au/ZrO2 catalyst, exhibited high activity for the selective oxidation of glucose. At the reaction temperature of 323K, reaction time of 1h, with the NaCO3-NaHCO3 as buffer solution, the yield of gluconic acid was 100%.

Three-dimensional TiO2@C nano-network with high porosity as a highly efficient Pt-based catalyst support for methanol electrooxidation

RSC Advances ◽  
2016 ◽  
Vol 6 (82) ◽  
pp. 79254-79262 ◽  
Author(s):  
Xu-Lei Sui ◽  
Da-Ming Gu ◽  
Zhen-Bo Wang ◽  
Jing Liu ◽  
Lei Zhao ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Catalyst Support ◽  
Three Dimensional ◽  
Methanol Electrooxidation ◽  
High Porosity ◽  
Combined Effects ◽  
Unique Structure ◽  
Highly Efficient ◽  
3D Network ◽  
Highly Porous

Pt-based catalyst supported on highly porous 3D-network structured TiO2@C nanowires is constructed and exhibits ultrahigh catalytic activity and durability, which can be attributed to the combined effects of its unique structure and composition.

Electron Holographic Nano-Characterization of Gold Catalyst at Interface

2002 ◽  
Vol 727 ◽  
Author(s):  
S. Ichikawa ◽  
T. Akita ◽  
M. Okumura ◽  
M. Haruta ◽  
K. Tanaka
Keyword(s):  
Contact Angle ◽  
Titanium Oxide ◽  
Gold Catalyst ◽  
Three Dimensional ◽  
High Resolution Electron Microscopy ◽  
Electron Holography ◽  
Gold Particles ◽  
Oxide Support ◽  
The Mean ◽  
A Charge

AbstractThe catalytic properties of nanostructured gold catalyst are known to depend on the size of the gold particles and to be activated when the size decreases to a few nanometers. We investigated the size dependence of the three-dimensional nanostructure on the mean inner potential of gold catalysts supported on titanium oxide using electron holography and high-resolution electron microscopy (HREM). The contact angle of the gold particles on the titanium oxide tended to be over 90° for gold particles with a size of over 5 nm, and below 90° for a size of below 2 nm. This decreasing change in the contact angle (morphology) acts to increase the perimeter and hence the area of the interface between the gold and titanium oxide support, which is considered to be an active site for CO oxidation. The mean inner potential of the gold particles also changed as their size decreased. The value of the inner potential of gold, which is approximately 25 V in bulk state, rose to over 40 V when the size of the gold particles was less than 2 nm. This phenomenon indicates the existence of a charge transfer at the interface between gold and titanium oxide. The 3-D structure change and the inner potential change should be attributed to the specific electronic structure at the interface, owing to both the “nano size effect” and the “hetero-interface effect.”

Three-dimensionally ordered macroporous spinel-type MCr2O4 (M = Co, Ni, Zn, Mn) catalysts with highly enhanced catalytic performance for soot combustion

2015 ◽  
Vol 5 (9) ◽  
pp. 4594-4601 ◽  
Author(s):  
Jinguo Wang ◽  
Gaoyang Yang ◽  
Li Cheng ◽  
Eun Woo Shin ◽  
Yong Men
Keyword(s):  
Catalytic Activity ◽  
Three Dimensional ◽  
Catalytic Performance ◽  
Soot Combustion ◽  
Spinel Type ◽  
Ordered Macroporous

MCr2O4 catalysts with three-dimensional ordered macroporous structures displayed superior catalytic activity for soot combustion to their bulk counterparts.

scholarly journals Catalytic Activity of Beta-Cyclodextrin-Gold Nanoparticles Network in Hydrogen Evolution Reaction

Catalysts ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 118
Author(s):  
Qui Quach ◽  
Erik Biehler ◽  
Ahmed Elzamzami ◽  
Clay Huff ◽  
Julia M. Long ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Gold Catalyst ◽  
Hydrogen Gas ◽  
Hydrolysis Reaction ◽  
X Ray Diffraction ◽  
Beta Cyclodextrin ◽  
Transmission Electron ◽  
Production Of Hydrogen ◽  
Climate Crisis

The current climate crisis warrants investigation into alternative fuel sources. The hydrolysis reaction of an aqueous hydride precursor, and the subsequent production of hydrogen gas, prove to be a viable option. A network of beta-cyclodextrin capped gold nanoparticles (BCD-AuNP) was synthesized and subsequently characterized by Powder X-Ray Diffraction (P-XRD), Fourier Transform Infrared (FTIR), Transmission Electron Microscopy (TEM), and Ultraviolet-Visible Spectroscopy (UV-VIS) to confirm the presence of gold nanoparticles as well as their size of approximately 8 nm. The catalytic activity of the nanoparticles was tested in the hydrolysis reaction of sodium borohydride. The gold catalyst performed best at 303 K producing 1.377 mL min−1 mLcat−1 of hydrogen. The activation energy of the catalyst was calculated to be 54.7 kJ/mol. The catalyst resisted degradation in reusability trials, continuing to produce hydrogen gas in up to five trials.

Three-Dimensional Ordered Arrays of 58×58×58 Å3 Hollow Frameworks in Ionic Crystals of M2Zn2-Substituted Polyoxometalates

2012 ◽  
Vol 51 (7) ◽  
pp. 1597-1601 ◽  
Author(s):  
Kosuke Suzuki ◽  
Yuji Kikukawa ◽  
Sayaka Uchida ◽  
Hiroko Tokoro ◽  
Kenta Imoto ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Ionic Crystals ◽  
Ordered Arrays

Facile synthesis of three-dimensional ordered macroporous Sr1−xKxTiO3 perovskites with enhanced catalytic activity for soot combustion

2018 ◽  
Vol 8 (21) ◽  
pp. 5462-5472 ◽  
Author(s):  
Peng Zhao ◽  
Nengjie Feng ◽  
Fan Fang ◽  
Geng Liu ◽  
Li Chen ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Three Dimensional ◽  
Catalytic Performance ◽  
Soot Combustion ◽  
Facile Synthesis ◽  
Ordered Macroporous

The appropriate incorporation of potassium into 3DOM SrTiO3 perovskites effectively improved the catalytic performance for soot combustion.

Nanoporous gold supported chromium-doped NiFe oxyhydroxides as high-performance catalysts for the oxygen evolution reaction

2019 ◽  
Vol 7 (16) ◽  
pp. 9690-9697 ◽  
Author(s):  
Jie-Song Sun ◽  
Yi-Tong Zhou ◽  
Rui-Qi Yao ◽  
Hang Shi ◽  
Zi Wen ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
High Performance ◽  
Three Dimensional ◽  
Nanoporous Gold

Chromium-doped NiFe oxyhydroxide nanosheets that are quasi-vertically oriented on three-dimensional nanoporous gold exhibit superior catalytic activity towards the oxygen evolution reaction.

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