ACTIVATION OF METAL HYDROGENATION CATALYSTS BY IRRADIATION

1962 ◽  
Vol 66 (3) ◽  
pp. 510-511 ◽  
Author(s):  
Donald Graham
Keyword(s):  
Hydrogenation Catalysts ◽  
Metal Hydrogenation

scholarly journals Inhibition of Metal Hydrogenation Catalysts by Biogenic Impurities

2014 ◽  
Vol 145 (1) ◽  
pp. 15-22 ◽  
Author(s):  
Thomas J. Schwartz ◽  
Zachary J. Brentzel ◽  
James A. Dumesic
Keyword(s):  
Hydrogenation Catalysts ◽  
Metal Hydrogenation

scholarly journals Low-Temperature Hydrogenation of Toluene Using an Iron-Promoted Molybdenum Carbide Catalyst

Catalysts ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1079
Author(s):  
Song Zhou ◽  
Xi Liu ◽  
Jian Xu ◽  
Hui Zhang ◽  
Xiaosong Liu ◽  
...  
Keyword(s):  
Molybdenum Carbide ◽  
Precious Metals ◽  
Catalytic Performance ◽  
Hydrogenation Catalysts ◽  
Toluene Hydrogenation ◽  
In Situ Xrd ◽  
Arene Hydrogenation ◽  
Potential Applications ◽  
Catalytic Stability ◽  
Metal Hydrogenation

As an alternative to noble metal hydrogenation catalysts, pure molybdenum carbide displays unsatisfactory catalytic activity for arene hydrogenation. Precious metals such as palladium, platinum, and gold are widely used as additives to enhance the catalytic activities of molybdenum carbide, which severely limits its potential applications in industry. In this paper, iron-promoted molybdenum carbide was prepared and characterized by various techniques, including in situ XRD, synchrotron-based XPS and TEM. while the influence of Fe addition on catalytic performance for toluene hydrogenation was also studied. The experimental data disclose that a small amount of Fe doping strongly enhances catalytic stability in toluene hydrogenation, but the catalytic performance drops rapidly with higher loading amounts of Fe.

EXAFS STUDY OF NICKEL AND IRON PRECURSORS OF HOMOGENEOUS ZIEGLER-TYPE HYDROGENATION CATALYSTS

1986 ◽  
Vol 47 (C8) ◽  
pp. C8-243-C8-248 ◽  
Author(s):  
C. ESSELIN ◽  
E. BAUER-GROSSE ◽  
J. GOULON ◽  
C. WILLIAMS ◽  
Y. CHAUVIN ◽  
...  
Keyword(s):  
Hydrogenation Catalysts ◽  
Exafs Study

Reaction Mechanisms of Inorganic and Organometallic Systems

2007 ◽  
Author(s):  
Robert B. Jordan
Keyword(s):  
Electron Transfer ◽  
Heterogeneous Systems ◽  
Asymmetric Hydrogenation ◽  
Pressure Effects ◽  
General Level ◽  
Hydrogenation Catalysts ◽  
Methyl Transferase ◽  
Transfer Region ◽  
Previous Edition ◽  
Oxide Synthase

This third edition retains the general level and scope of earlier editions, but has been substantially updated with over 900 new references covering the literature through 2005, and 140 more pages of text than the previous edition. In addition to the general updating of materials, there is new or greatly expanded coverage of topics such as Curtin-Hammett conditions, pressure effects, metal hydrides and asymmetric hydrogenation catalysts, the inverted electron-transfer region, intervalence electron transfer, photochemistry of metal carbonyls, methyl transferase and nitric oxide synthase. The new chapter on heterogeneous systems introduces the basic background to this industrially important area. The emphasis is on inorganic examples of gas/liquid and gas/liquid/solid systems and methods of determining heterogeneity.

scholarly journals Development and Application of Efficient Ag‐based Hydrogenation Catalysts Prepared from Rice Husk Waste

ChemCatChem ◽  
2021 ◽  
Author(s):  
Felix Unglaube ◽  
Carsten Robert Kreyenschulte ◽  
Esteban Mejía
Keyword(s):  
Rice Husk ◽  
Hydrogenation Catalysts

Intensification and optimisation of nickel recovery from spent hydrogenation catalysts via ultrasound-augmented hydrometallurgy

2021 ◽  
pp. 105771
Author(s):  
Mitchell S.W. Lim ◽  
Thomas C.K. Yang ◽  
Yeow Hong Yap ◽  
Guan-Ting Pan ◽  
Siewhui Chong ◽  
...  
Keyword(s):  
Hydrogenation Catalysts ◽  
Nickel Recovery

scholarly journals Robust and efficient hydrogenation of carbonyl compounds catalysed by mixed donor Mn(I) pincer complexes

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Wenjun Yang ◽  
Ivan Yu. Chernyshov ◽  
Robin K. A. van Schendel ◽  
Manuela Weber ◽  
Christian Müller ◽  
...  
Keyword(s):  
Noble Metal ◽  
Crucial Role ◽  
Carbonyl Compounds ◽  
Catalytic Performance ◽  
Hydrogen Atmosphere ◽  
Pincer Complexes ◽  
Catalyst Activation ◽  
Hydrogenation Catalysts ◽  
Induction Times

AbstractAny catalyst should be efficient and stable to be implemented in practice. This requirement is particularly valid for manganese hydrogenation catalysts. While representing a more sustainable alternative to conventional noble metal-based systems, manganese hydrogenation catalysts are prone to degrade under catalytic conditions once operation temperatures are high. Herein, we report a highly efficient Mn(I)-CNP pre-catalyst which gives rise to the excellent productivity (TOF° up to 41 000 h−1) and stability (TON up to 200 000) in hydrogenation catalysis. This system enables near-quantitative hydrogenation of ketones, imines, aldehydes and formate esters at the catalyst loadings as low as 5–200 p.p.m. Our analysis points to the crucial role of the catalyst activation step for the catalytic performance and stability of the system. While conventional activation employing alkoxide bases can ultimately provide catalytically competent species under hydrogen atmosphere, activation of Mn(I) pre-catalyst with hydride donor promoters, e.g. KHBEt3, dramatically improves catalytic performance of the system and eliminates induction times associated with slow catalyst activation.

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