Ferric hydroxide supported gold subnano clusters or quantum dots: enhanced catalytic performance in chemoselective hydrogenation

2008 ◽  
pp. 2542 ◽  
Author(s):  
Lequan Liu ◽  
Botao Qiao ◽  
Yubo Ma ◽  
Juan Zhang ◽  
Youquan Deng
Keyword(s):  
Quantum Dots ◽  
Ferric Hydroxide ◽  
Catalytic Performance ◽  
Chemoselective Hydrogenation ◽  
Supported Gold

scholarly journals Gold catalysts containing interstitial carbon atoms boost hydrogenation activity

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Yafei Sun ◽  
Yueqiang Cao ◽  
Lili Wang ◽  
Xiaotong Mu ◽  
Qingfei Zhao ◽  
...  
Keyword(s):  
Gold Catalyst ◽  
Catalytic Performance ◽  
Activation Entropy ◽  
Hydrogenation Activity ◽  
Noble Metal Catalysts ◽  
Heterogeneous Catalytic ◽  
Chemoselective Hydrogenation ◽  
Heterolytic Dissociation ◽  
Supported Gold Nanoparticles ◽  
Supported Gold

Abstract Supported gold nanoparticles are emerging catalysts for heterogeneous catalytic reactions, including selective hydrogenation. The traditionally used supports such as silica do not favor the heterolytic dissociation of hydrogen on the surface of gold, thus limiting its hydrogenation activity. Here we use gold catalyst particles partially embedded in the pore walls of mesoporous carbon with carbon atoms occupying interstitial sites in the gold lattice. This catalyst allows improved electron transfer from carbon to gold and, when used for the chemoselective hydrogenation of 3-nitrostyrene, gives a three times higher turn-over frequency (TOF) than that for the well-established Au/TiO2 system. The d electron gain of Au is linearly related to the activation entropy and TOF. The catalyst is stable, and can be recycled ten times with negligible loss of both reaction rate and overall conversion. This strategy paves the way for optimizing noble metal catalysts to give an enhanced hydrogenation catalytic performance.

scholarly journals Magnetic Fe3O4-Supported Gold Nanoflowers with Lattice-Selected Surfaces: Preparation and Catalytic Performance

ACS Omega ◽  
2020 ◽  
Vol 5 (25) ◽  
pp. 15755-15760
Author(s):  
Yoshiro Imura ◽  
Ryota Kan ◽  
Ryota Akiyama ◽  
Haruna Saito ◽  
Clara Morita-Imura ◽  
...  
Keyword(s):  
Catalytic Performance ◽  
Gold Nanoflowers ◽  
Supported Gold ◽  
Magnetic Fe3o4

An Unusual Chemoselective Hydrogenation of Quinoline Compounds Using Supported Gold Catalysts

2012 ◽  
Vol 134 (42) ◽  
pp. 17592-17598 ◽  
Author(s):  
Dong Ren ◽  
Lin He ◽  
Lei Yu ◽  
Ran-Sheng Ding ◽  
Yong-Mei Liu ◽  
...  
Keyword(s):  
Gold Catalysts ◽  
Supported Gold Catalysts ◽  
Chemoselective Hydrogenation ◽  
Supported Gold

scholarly journals MOF-derived Ni-based nanocomposites as robust catalysts for chemoselective hydrogenation of functionalized nitro compounds

RSC Advances ◽  
2017 ◽  
Vol 7 (3) ◽  
pp. 1531-1539 ◽  
Author(s):  
Bo Tang ◽  
Wei-Chao Song ◽  
En-Cui Yang ◽  
Xiao-Jun Zhao
Keyword(s):  
Catalytic Performance ◽  
Nitro Compounds ◽  
Graphitic Carbon ◽  
Ni Nanoparticles ◽  
Chemoselective Hydrogenation ◽  
Highly Dispersed

Highly dispersed Ni nanoparticles within graphitic carbon layers were prepared by facile thermolysis of a Ni-MOF, which exhibited outstanding catalytic performance in the chemoselective hydrogenation of diverse functionalized nitro compounds.

Carbon-Supported Gold Catalyst Modified by Doping with Ag for Cyclohexene Oxidation

2011 ◽  
Vol 236-238 ◽  
pp. 3046-3050
Author(s):  
Zhen Yu Cai ◽  
Ming Qiao Zhu ◽  
Yue Tang ◽  
Yi Liu ◽  
Huan Dai ◽  
...  
Keyword(s):  
Gold Catalyst ◽  
Catalytic Performance ◽  
Cyclohexene Oxide ◽  
Cyclohexene Oxidation ◽  
X Ray Diffraction ◽  
Efficient Catalyst ◽  
X Ray ◽  
Supported Gold Catalysts ◽  
Transmission Electron ◽  
Supported Gold

Carbon-supported gold catalysts Au/C were prepared by an impregnation-reduction method and modified by AgNO3to obtain bi-metallic catalysts Au-Ag/C, which were characterized by X-ray-diffraction (XRD) and Transmission Electron Microscope (TEM). Their catalytic performance was tested in the oxidation of cyclohexene in an autoclave without any solvent. The results showed that Ag doping can significantly enhance the catalytic performance of carbon-supported gold catalyst. Au(1.0 wt.%)-Ag(1.0 wt.%)/C has been found to be an efficient catalyst for the cyclohexene oxidation with a conversion of 27.6% at 80 °C and 0.4 MPa for 12 h while selectivity for ∑C6products (including cyclohexene oxide, 2-cyclohexene-1-ol, 2-cyclohexene-1-one and cyclohexane-1,2-diol) exceeding 88.9%, especially the selectivity of cyclohexane-1,2-diol up to 47.6%. Moreover, the effects of Au, Ag content on catalytic performance were also reported.

scholarly journals Catalytic performance of cobalt oxide-supported gold-palladium nanocatalysts for the removal of toluene and o -xylene

2017 ◽  
Vol 38 (2) ◽  
pp. 207-216 ◽  
Author(s):  
Zhiwei Wang ◽  
Yuxi Liu ◽  
Tao Yang ◽  
Jiguang Deng ◽  
Shaohua Xie ◽  
...  
Keyword(s):  
Cobalt Oxide ◽  
Catalytic Performance ◽  
Palladium Nanocatalysts ◽  
Supported Gold

Copper nanoparticles socketed in situ into copper phyllosilicate nanotubes with enhanced performance for chemoselective hydrogenation of esters

2017 ◽  
Vol 53 (51) ◽  
pp. 6933-6936 ◽  
Author(s):  
Xiaoxiao Gong ◽  
Meiling Wang ◽  
Huihuang Fang ◽  
Xiaoqi Qian ◽  
Linmin Ye ◽  
...  
Keyword(s):  
Copper Nanoparticles ◽  
Selective Hydrogenation ◽  
Elevated Temperatures ◽  
Catalytic Performance ◽  
Reducing Atmosphere ◽  
Chemoselective Hydrogenation ◽  
Excellent Catalytic Performance

Copper nanoparticles exsoluted in situ under a reducing atmosphere at elevated temperatures are socketed into the parent copper phyllosilicate nanotubes and exhibit excellent catalytic performance and superior stability for the selective hydrogenation of various esters to alcohols.

Solvent-free oxidation of benzyl alcohol using titania-supported gold–palladium catalysts: Effect of Au–Pd ratio on catalytic performance

2007 ◽  
Vol 122 (3-4) ◽  
pp. 407-411 ◽  
Author(s):  
Dan I. Enache ◽  
Dean Barker ◽  
Jennifer K. Edwards ◽  
Stuart H. Taylor ◽  
David W. Knight ◽  
...  
Keyword(s):  
Benzyl Alcohol ◽  
Palladium Catalysts ◽  
Catalytic Performance ◽  
Solvent Free ◽  
Oxidation Of Benzyl Alcohol ◽  
Gold Palladium Catalysts ◽  
Supported Gold ◽  
Free Oxidation
Sign in / Sign up

Export Citation Format

Share Document