From Ruthenium to Iron and Manganese-A Mechanistic View on Challenges and Design Principles of Base-Metal Hydrogenation Catalysts

ChemCatChem ◽  
2018 ◽  
Vol 10 (9) ◽  
pp. 1930-1940 ◽  
Author(s):  
Thomas Zell ◽  
Robert Langer
Keyword(s):  
Base Metal ◽  
Design Principles ◽  
Hydrogenation Catalysts ◽  
Metal Hydrogenation ◽  
Mechanistic View ◽  
Iron And Manganese

Cobalt Precursors for High-Throughput Discovery of Base Metal Asymmetric Alkene Hydrogenation Catalysts

Science ◽  
2013 ◽  
Vol 342 (6162) ◽  
pp. 1076-1080 ◽  
Author(s):  
M. R. Friedfeld ◽  
M. Shevlin ◽  
J. M. Hoyt ◽  
S. W. Krska ◽  
M. T. Tudge ◽  
...  
Keyword(s):  
Base Metal ◽  
High Throughput ◽  
Hydrogenation Catalysts ◽  
Alkene 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

ChemInform Abstract: Cobalt Precursors for High-Throughput Discovery of Base Metal Asymmetric Alkene Hydrogenation Catalysts.

ChemInform ◽  
2014 ◽  
Vol 45 (19) ◽  
pp. no-no
Author(s):  
Max R. Friedfeld ◽  
Michael Shevlin ◽  
Jordan M. Hoyt ◽  
Shane W. Krska ◽  
Matthew T. Tudge ◽  
...  
Keyword(s):  
Base Metal ◽  
High Throughput ◽  
Hydrogenation Catalysts ◽  
Alkene 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.

Colloidal systems in soils

1994 ◽  
Vol 52 ◽  
pp. 64-65
Author(s):  
J. Thieme ◽  
J. Niemeyer ◽  
P. Guttman
Keyword(s):  
Clay Minerals ◽  
Polymeric Materials ◽  
Spatial Arrangement ◽  
High Specific Surface Area ◽  
Turnover Rates ◽  
Colloidal Systems ◽  
Chemical Conditions ◽  
Aggregation Phenomena ◽  
Iron And Manganese ◽  
Soil Colloids

In soil science the fraction of colloids in soils is understood as particles with diameters smaller than 2μm. Clay minerals, aquoxides of iron and manganese, humic substances, and other polymeric materials are found in this fraction. The spatial arrangement (microstructure) is controlled by the substantial structure of the colloids, by the chemical composition of the soil solution, and by thesoil biota. This microstructure determines among other things the diffusive mass flow within the soils and as a result the availability of substances for chemical and microbiological reactions. The turnover of nutrients, the adsorption of toxicants and the weathering of soil clay minerals are examples of these surface mediated reactions. Due to their high specific surface area, the soil colloids are the most reactive species in this respect. Under the chemical conditions in soils, these minerals are associated in larger aggregates. The accessibility of reactive sites for these reactions on the surface of the colloids is reduced by this aggregation. To determine the turnover rates of chemicals within these aggregates it is highly desirable to visualize directly these aggregation phenomena.

A peek in the micro-sized world: a review of design principles, engineering tools, and applications of engineered microbial community

2020 ◽  
Vol 48 (2) ◽  
pp. 399-409
Author(s):  
Baizhen Gao ◽  
Rushant Sabnis ◽  
Tommaso Costantini ◽  
Robert Jinkerson ◽  
Qing Sun
Keyword(s):  
Microbial Community ◽  
Microbial Communities ◽  
Environmental Remediation ◽  
Real Life ◽  
Design Principles ◽  
Microbial Interactions ◽  
Potential Applications ◽  
New Gene ◽  
Global Biogeochemical Cycles ◽  
Synthetic Microbial Communities

Microbial communities drive diverse processes that impact nearly everything on this planet, from global biogeochemical cycles to human health. Harnessing the power of these microorganisms could provide solutions to many of the challenges that face society. However, naturally occurring microbial communities are not optimized for anthropogenic use. An emerging area of research is focusing on engineering synthetic microbial communities to carry out predefined functions. Microbial community engineers are applying design principles like top-down and bottom-up approaches to create synthetic microbial communities having a myriad of real-life applications in health care, disease prevention, and environmental remediation. Multiple genetic engineering tools and delivery approaches can be used to ‘knock-in' new gene functions into microbial communities. A systematic study of the microbial interactions, community assembling principles, and engineering tools are necessary for us to understand the microbial community and to better utilize them. Continued analysis and effort are required to further the current and potential applications of synthetic microbial communities.

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