Photodeposition of Pd onto TiO2 nanowires for aqueous-phase selective hydrogenation of phenolics to cyclohexanones

Nanoscale ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 2603-2612
Author(s):  
Chenchen Tian ◽  
Huihuang Fang ◽  
Hanming Chen ◽  
Weikun Chen ◽  
Song Zhou ◽  
...  
Keyword(s):  
Aqueous Phase ◽  
Selective Hydrogenation ◽  
High Selectivity ◽  
Tio2 Nanowires ◽  
Phenol Hydrogenation ◽  
Full Conversion

The photodeposition of Pd onto TiO2 nanowires can catalyze phenol hydrogenation to cyclohexanone with a nearly full conversion and high selectivity (>99%) at 50 °C under 5 bar H2 pressure in water.

Ionic Liquid Immobilized Nickel(0) Nanoparticles as Stable and Highly Efficient Catalysts for Selective Hydrogenation in the Aqueous Phase

2010 ◽  
Vol 5 (5) ◽  
pp. 1178-1184 ◽  
Author(s):  
Yu Hu ◽  
Yinyin Yu ◽  
Zhenshan Hou ◽  
Hanming Yang ◽  
Bo Feng ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Aqueous Phase ◽  
Selective Hydrogenation ◽  
Highly Efficient

Selective hydrogenation of 2-pentenal using highly dispersed Pt catalysts supported on ZnSnAl mixed metal oxides derived from layered double hydroxides

2020 ◽  
Vol 10 (4) ◽  
pp. 1106-1116
Author(s):  
Huanjun Wang ◽  
Xiaocheng Lan ◽  
Shiqing Wang ◽  
Babar Ali ◽  
Tiefeng Wang
Keyword(s):  
Metal Oxides ◽  
Layered Double Hydroxides ◽  
Selective Hydrogenation ◽  
High Selectivity ◽  
Mixed Metal Oxides ◽  
Pt Catalysts ◽  
Mixed Metal ◽  
Highly Dispersed ◽  
Double Hydroxides

Highly dispersed Pt catalysts supported on ZnSnAl mixed metal oxides showed high selectivity for 2-pentenol in selective hydrogenation of 2-pentenal.

Effect of Hydrotalcites Interlayer Water on Pt-Catalyzed Aqueous-Phase Selective Hydrogenation of Cinnamaldehyde

2019 ◽  
Vol 12 (2) ◽  
pp. 2516-2524 ◽  
Author(s):  
Xing Gao ◽  
Hua Dai ◽  
Lilin Peng ◽  
Di Lu ◽  
Xiaoyue Wan ◽  
...  
Keyword(s):  
Aqueous Phase ◽  
Selective Hydrogenation ◽  
Interlayer Water ◽  
Pt Catalyzed

Pt nanoparticles supported on YCoxFe1−xO3 perovskite oxides: highly efficient catalysts for liquid-phase hydrogenation of cinnamaldehyde

2019 ◽  
Vol 55 (23) ◽  
pp. 3363-3366 ◽  
Author(s):  
Yujie Xue ◽  
Huiyue Xin ◽  
Wenhui Xie ◽  
Peng Wu ◽  
Xiaohong Li
Keyword(s):  
Liquid Phase ◽  
Selective Hydrogenation ◽  
Pt Nanoparticles ◽  
Perovskite Oxides ◽  
Cinnamyl Alcohol ◽  
Highly Efficient ◽  
Liquid Phase Hydrogenation ◽  
Full Conversion

The Pt/YCo0.3Fe0.7O3 catalyst furnished ca. 95% selectivity to cinnamyl alcohol at nearly full conversion for the selective hydrogenation of cinnamaldehyde.

A New Supported Rhodium Catalyst for Selective Hydrogenation of Nitriles to Primary Amines

2007 ◽  
Vol 72 (4) ◽  
pp. 468-474 ◽  
Author(s):  
Peter T. Witte
Keyword(s):  
Selective Hydrogenation ◽  
High Selectivity ◽  
Rhodium Catalyst ◽  
Primary Amines ◽  
Mild Conditions ◽  
Pharmaceutical Applications ◽  
Strong Acids ◽  
Hydrogenation Of Nitriles ◽  
Supported Rhodium Catalyst

Nitriles are converted to primary amines with high selectivity using a newly developed alumina-supported rhodium catalyst. The high selectivity is obtained without any additives, which are often used to prevent the formation of higher amines. The catalyst is active under mild conditions in various solvents, which makes it specifically suitable for use in pharmaceutical applications or for other substrates that can react with additives like strong acids or bases.

scholarly journals Improvement of the selectivity of isophorone hydrogenation by Lewis acids

2018 ◽  
Vol 5 (5) ◽  
pp. 171523 ◽  
Author(s):  
Yucui Hou ◽  
Shuhang Ren ◽  
Muge Niu ◽  
Weize Wu
Keyword(s):  
Organic Solvent ◽  
Lewis Acid ◽  
Selective Hydrogenation ◽  
Lewis Acids ◽  
High Selectivity ◽  
Positive Impact

The selective hydrogenation of isophorone (3,5,5-trimethyl-2- cyclohexen-1-one) to produce 3,3,5-trimethylcyclohexanone (TMCH), an important organic solvent and pharmaceutical intermediate, is of significance in industry. However, the over-hydrogenation to produce the by-product 3,3,5-trimethylcyclohexanol causes issues. Up to now, it is still a challenge to hydrogenate isophorone to TMCH with high selectivity. In this work, we found that Lewis acids could inhibit the hydrogenation of C=O bond on isophorone, thus greatly improving the selectivity towards TMCH. In addition, added solvents like supercritical CO 2 also had a positive impact on the selectivity. Both the conversion and selectivity could be increased to more than 99% when suitable Lewis acid and solvent were employed. Nevertheless, Lewis acid also exhibited some inhibition on the hydrogenation of the C=C bond of isophorone. Hence, a relatively weak Lewis acid, ZnCl 2 , is suitable for the selective hydrogenation.

A selective and stable Fe/TiO2 catalyst for selective hydrogenation of butadiene in alkene-rich stream

2021 ◽  
Author(s):  
Zhao Wang ◽  
Laura Santander de Soto ◽  
Christophe Méthivier ◽  
Sandra Casale ◽  
Catherine Louis ◽  
...  
Keyword(s):  
Selective Hydrogenation ◽  
High Selectivity ◽  
Good Stability ◽  
Tio2 Catalyst

The Fe/TiO2 catalyst shows high selectivity to alkenes at high butadiene conversion and good stability at 175 °C.

Highly selective Pd@mpg-C3N4 catalyst for phenol hydrogenation in aqueous phase

RSC Advances ◽  
2013 ◽  
Vol 3 (27) ◽  
pp. 10973 ◽  
Author(s):  
Yi Li ◽  
Xuan Xu ◽  
Pengfei Zhang ◽  
Yutong Gong ◽  
Haoran Li ◽  
...  
Keyword(s):  
Aqueous Phase ◽  
Phenol Hydrogenation

Selective aldol condensation of biomass-derived levulinic acid and furfural in aqueous-phase over MgO and ZnO

2016 ◽  
Vol 18 (11) ◽  
pp. 3430-3438 ◽  
Author(s):  
Guanfeng Liang ◽  
Aiqin Wang ◽  
Xiaochen Zhao ◽  
Nian Lei ◽  
Tao Zhang
Keyword(s):  
Aqueous Phase ◽  
Levulinic Acid ◽  
High Selectivity ◽  
Aldol Condensation ◽  
Major Product

MgO affords a high selectivity towards δ-furfurylidenelevulinic acid, while ZnO gives β-furfurylidenelevulinic acid as the major product in the aldol condensation of biomass-derived levulinic acid and furfural in the aqueous-phase.

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