scholarly journals Hollow mesoporous silica supported PtIr bimetal catalysts for selective hydrogenation of phenol: significant promotion effect of iridium

RSC Advances ◽  
2017 ◽  
Vol 7 (50) ◽  
pp. 31582-31587 ◽  
Author(s):  
Yuying Zheng ◽  
Peishan He ◽  
Yanxiong Fang ◽  
Xu Yang ◽  
Huagen Liang
Keyword(s):  
Mesoporous Silica ◽  
Selective Hydrogenation ◽  
Pt Catalyst ◽  
Hydrogenation Rate ◽  
Promotion Effect ◽  
Mild Conditions ◽  
Enhanced Activity ◽  
Hollow Mesoporous Silica

Ir promoted Pt catalyst is prepared using hollow mesoporous silica as support. It shows high hydrogenation rate of 4255 mmol h−1 gPt−1 at mild conditions (50 °C and 0.5 MPa of pH2). The promotion effect of Ir contributes to the enhanced activity.

Rh nanoclusters encaged in hollow mesoporous silica nanoreactors with enhanced catalytic performance for phenol selective hydrogenation

2020 ◽  
Vol 397 ◽  
pp. 125484 ◽  
Author(s):  
Peijian Yan ◽  
Pengfei Tian ◽  
Kaijie Li ◽  
Martien A. Cohen Stuart ◽  
Junyou Wang ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Selective Hydrogenation ◽  
Catalytic Performance ◽  
Hollow Mesoporous Silica

Crystallization of hollow mesoporous silica nanoparticles

2015 ◽  
Vol 51 (20) ◽  
pp. 4164-4167 ◽  
Author(s):  
Glenna L. Drisko ◽  
Adrian Carretero-Genevrier ◽  
Alexandre Perrot ◽  
Martí Gich ◽  
Jaume Gàzquez ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Silica Nanoparticles ◽  
Mesoporous Silica Nanoparticles ◽  
Mild Conditions ◽  
Complex Architectures ◽  
Hollow Mesoporous Silica ◽  
Structured Silica

Amorphous structured silica can now be crystallized to pure α-quartz under relatively mild conditions, while preserving initial complex architectures.

A soft–hard template approach towards hollow mesoporous silica nanoparticles with rough surfaces for controlled drug delivery and protein adsorption

2015 ◽  
Vol 3 (31) ◽  
pp. 6480-6489 ◽  
Author(s):  
Haijiao Zhang ◽  
Huijuan Xu ◽  
Minghong Wu ◽  
Yufang Zhong ◽  
Donghai Wang ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Mesoporous Silica ◽  
Silica Nanoparticles ◽  
Protein Adsorption ◽  
Rough Surfaces ◽  
Mesoporous Silica Nanoparticles ◽  
Controlled Drug Delivery ◽  
Hard Template ◽  
Hollow Mesoporous Silica

Novel hollow mesoporous silica nanoparticles (HMSNs) with rough surfaces have been successfully prepared using a facile soft–hard template route.

scholarly journals High-Active Metallic-Activated Carbon Catalysts for Selective Hydrogenation

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Nicolás Carrara ◽  
Carolina Betti ◽  
Fernando Coloma-Pascual ◽  
María Cristina Almansa ◽  
Laura Gutierrez ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Selective Hydrogenation ◽  
Nickel Catalysts ◽  
Metallic Phase ◽  
Hydrogen Chemisorption ◽  
Electronic Effects ◽  
X Ray ◽  
Mild Conditions ◽  
Temperature Programmed ◽  
Carbon Catalysts

A series of low-loaded metallic-activated carbon catalysts were evaluated during the selective hydrogenation of a medium-chain alkyne under mild conditions. The catalysts and support were characterized by ICP, hydrogen chemisorption, Raman spectroscopy, temperature-programmed desorption (TPD), temperature-programmed reduction (TPR), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR micro-ATR), transmission electronic microscopy (TEM), and X-ray photoelectronic spectroscopy (XPS). When studying the effect of the metallic phase, the catalysts were active and selective to the alkene synthesis. NiCl/C was the most active and selective catalytic system. Besides, when the precursor salt was evaluated, PdN/C was more active and selective than PdCl/C. Meanwhile, alkyne is present in the reaction media, and geometrical and electronic effects favor alkene desorption and so avoid their overhydrogenation to the alkane. Under mild conditions, nickel catalysts are considerably more active and selective than the Lindlar catalyst.

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