Archive for the ‘Hot Articles’ Category

HOT Article: Asymmetric Iron Catalysts

From the Haber process to discrete enzymatic reactions iron is an important element in catalytic chemistry. Up until recently, however, iron has been significantly under-utilised as a homogeneous catalyst in organic synthesis compared to other transition metals. Recently homogeneous iron-based catalysts have undergone much development with some notable breakthroughs. Muftah Darwish and Martin Wills have compiled a thorough review of these in their HOT Perspective “Asymmetric catalysis using iron complexes – ‘Ruthenium Lite’?”. If you’re looking to reduce ketones or imines, perform transfer hydrogenation or asymmetric hydrosilylation this review will bring you up to date on the latest and greatest capabilities of these advanced iron complexes.

Read the full article for free in Catalysis Science & Technology.

 

Asymmetric catalysis using iron complexes – ‘Ruthenium Lite’?
Muftah Darwish and Martin Wills
Catal. Sci. Technol., 2012, Advance Article
DOI: 10.1039/C1CY00390A, Perspective

Digg This
Reddit This
Stumble Now!
Share on Facebook
Bookmark this on Delicious
Share on LinkedIn
Bookmark this on Technorati
Post on Twitter
Google Buzz (aka. Google Reader)

HOT Article: Carbon Dioxide – not just a green house gas!

Using CO2 as a sustainable feedstock for industry is attracting increased attention. However, the low reactivity of carbon dioxide means its use can be quite limited, requiring extreme conditions for reactions to occur. Kazushi Mashima and colleagues from Japan and Germany have developed a new tetranuclear zinc cluster system which catalyses the insertion of CO2 into epoxide rings to produce cyclic carbonates. Their system shows good activity at room temperature, ambient pressure, is tolerant to a wide range of CO2 impurities and water………… making this a very versatile catalyst!

 

For more details into their investigation read this advance article which is free to access in Catalysis Science & Technology until 2012

Efficient cyclic carbonate synthesis catalyzed by zinc cluster systems under mild conditions

Yi Yang, Yukiko Hayashi, Yuka Fujii, Takuto Nagano, Yusuke Kita, Takashi Ohshima, Jun Okudac and Kazushi Mashima

Catal. Sci. Technol., 2012, Advance Article

DOI: 10.1039/C1CY00404B, Paper

Digg This
Reddit This
Stumble Now!
Share on Facebook
Bookmark this on Delicious
Share on LinkedIn
Bookmark this on Technorati
Post on Twitter
Google Buzz (aka. Google Reader)

HOT Minireview: Graphene & catalysis

Catalytic uses of graphene and its composities have shown promising results.

Catalytic uses of graphene and its composities have shown promising results.

In this Catalysis Science & Technology HOT Minireview Bruno Machado and Philippe Serp give a broad overview of topics relating to graphene and its application in synthesis and catalysis.  The outstanding physical, chemical and mechanical properties of graphene have attracted huge amounts of attention and Machaso and Serp attempt to distill out the properties and characterisation techniques of graphene that are pertinent to catalysis.

Read more for free until the 29th November 2011 at:

Graphene-based materials for catalysis
Bruno F. Machado and Philippe Serp
Catal. Sci. Technol., 2012, Advance Article
DOI: 10.1039/C1CY00361E

Why not check-out some other articles published in Catalysis Science & Technology featuring graphene:

In situ green synthesis of Au nanostructures on graphene oxide and their application for catalytic reduction of 4-nitrophenol
Yingwei Zhang, Sen Liu, Wenbo Lu, Lei Wang, Jingqi Tian and Xuping Sun
Catal. Sci. Technol., 2011, 1, 1142-1144
DOI: 10.1039/C1CY00205H

Microwave-assisted synthesis of ZnO–graphene composite for photocatalytic reduction of Cr(VI)
Xinjuan Liu, Likun Pan, Tian Lv, Ting Lu, Guang Zhu, Zhuo Sun and Changqing Sun
Catal. Sci. Technol., 2011, 1, 1189-1193
DOI: 10.1039/C1CY00109D

Graphene support for enhanced electrocatalytic activity of Pd for alcohol oxidation
Ravindra Nath Singh and Rahul Awasthi
Catal. Sci. Technol., 2011, 1, 778-783
DOI: 10.1039/C1CY00021G

Digg This
Reddit This
Stumble Now!
Share on Facebook
Bookmark this on Delicious
Share on LinkedIn
Bookmark this on Technorati
Post on Twitter
Google Buzz (aka. Google Reader)

Capturing carbon dioxide electrochemically

Over the past several years, there has been a growing interest in the capture of carbon dioxide emissions and either their permanent immobilization or chemical conversion to industrially relevant products. Though several processes have been developed to capture CO2, many of them are quite expensive since they require either ultra high purity CO2 or are energy intensive. Also, many purely chemical methods show low product selectivity.

This Perspective article, by William Mustain and co-workds, looks at ways in which electrochemical, photoelectrochemical and bioelectrochemical methods could be used for CO2 conversion. Electrochemical processes can reduce cost and increase reaction selectivity because they allow for direct control of the surface free energy.

Find out more about electrochemical solutions to the carbon capture problem in Mustain’s Hot Catalysis Science & Technology Perspective:

Recent progress in the electrochemical conversion and utilization of CO2
Neil S. Spinner, Jose A. Vega and William E. Mustain
Catal. Sci. Technol., 2012, DOI: 10.1039/C1CY00314C

You can read this article for free – if you haven’t already why not sign up for free access to Catalysis Science & Technology here.

Digg This
Reddit This
Stumble Now!
Share on Facebook
Bookmark this on Delicious
Share on LinkedIn
Bookmark this on Technorati
Post on Twitter
Google Buzz (aka. Google Reader)

HOT Article: Biologically inspired nanocatalysts

This HOT perspective in Catalysis Science and Technology gives an insightful review from Miami into recent developments being made in biocatalysts. Their review covers the use of peptides to synthesise monometallic and multicomponent nanocatalysts, the use of peptide-scaffolds to produce non-spherical inorganic nanostructures and the potential of nanozymes. Nanozymes are bionanocatalysts which exploit the catalytic properties of enzyme active sites with the high dispersion and accessibility provided by colloids…… exciting stuff!

Read more by accessing the full Perspective for free.

Mimicking nature’s strategies for the design of nanocatalysts
Rohit Bhandari, Ryan Coppagez and Marc R. Knecht
Catal. Sci. Technol., 2011, Perspective
DOI: 10.1039/c1cy00350j

 

Digg This
Reddit This
Stumble Now!
Share on Facebook
Bookmark this on Delicious
Share on LinkedIn
Bookmark this on Technorati
Post on Twitter
Google Buzz (aka. Google Reader)

HOT Article: Digestion produces high surface area catalysts

In this Catalysis Science and Technology HOT Article, the selective synthesis of an amorphous titania-zirconia mixed oxide with a very high specific surface area is described. The synthesized mixed oxide has been thoroughly characterized by various techniques and evaluated for an important oxidative dehrogenation reaction using CO2 as a soft oxidant.

Read more for FREE at:
High surface area TiO2–Zr2 prepared by caustic solution treatment, and its catalytic efficiency in the oxidehydrogenation of para-ethyltoluene by CO2
Abhishek Burri, Nanzhe Jiang and Sang-Eon Park
Catal. Sci. Technol., 2012, Advance Article
DOI: 10.1039/C1CY00281C

Digg This
Reddit This
Stumble Now!
Share on Facebook
Bookmark this on Delicious
Share on LinkedIn
Bookmark this on Technorati
Post on Twitter
Google Buzz (aka. Google Reader)

Reactions of a bio-renewable platform chemical

In their recent Catalysis Science & Technology Hot Article, Andrew Marr and co-workers investigate the amination and dehydration of the key biomass intermediate, 1,3-propanediol, to make commercial chemicals.

Chemicals that can be derived from biomass will be of increasing importance as oil resources become stretched over an ever expanding market. The efficient conversion of intermdiates derived from biomass by fermentation to commercial chemicals is the key to a more sustainable chemical industry. 1,3-Propanediol (1,3-PDO) is one such intermediate, for example the fermentation of glycerol from biodiesel production by Clostridium butyricum produces 1,3-propanediol with good productivity.  

In their Hot Article the group, based at Queen’s University Belfast, subjected this 1,3-propanediol to a range of amination conditions and found that an N-heterocyclic carbene piano stool complex was a good catalyst for amination and dehydration. Find out more by reading the article itself below – free to access.

Amination and dehydration of 1,3-propanediol by hydrogen transfer: reactions of a bio-renewable platform chemical
Sophie D. Lacroix, Annie Pennycook, Shifang Liu, Thomas T. Eisenhart and Andrew C. Marr
Catal. Sci. Technol., 2011, DOI: 10.1039/C1CY00339A

Digg This
Reddit This
Stumble Now!
Share on Facebook
Bookmark this on Delicious
Share on LinkedIn
Bookmark this on Technorati
Post on Twitter
Google Buzz (aka. Google Reader)

Hot Article: Stefan Kaskel investigates the partial oxidation of methane

Stefan Kaskel and team look at the partial oxidation and dry reformation of methane using a ceria/platinum catalyst on a silicon carbide support in this Catalysis Science & Technology Hot article.

This catalyst will be useful in the production of syngas, which is used in the Fischer-Tropsch process to make hydrocarbons and methanol (see our earlier post for other articles on this topic)

Stefan Kaskel is from Dresden University of Technology, Germany, visit his website to find out more about his research.

Read the full article for FREE to find out more…

Complete and partial oxidation of methane on ceria/platinum silicon carbide nanocomposites
Robert Frind, Lars Borchardt, Emanuel Kockrick, Lars Mammitzsch, Uwe Petasch, Mathias Herrmann and Stefan Kaskel
Catal. Sci. Technol., 2012, DOI: 10.1039/C1CY00311A

Digg This
Reddit This
Stumble Now!
Share on Facebook
Bookmark this on Delicious
Share on LinkedIn
Bookmark this on Technorati
Post on Twitter
Google Buzz (aka. Google Reader)

Hot Article: Accelerating the Baylis-Hillman

In this Catalysis Science & Technology Hot article Atul Chaskar and colleagues look at how the use of micelles can accelerate the rate of the Baylis-Hillman reaction.

The Baylis-Hillman reaction is used to form carbon-carbon bonds via the reaction of an aldehyde and an electron deficient olefin in the presence of DABCO.

Read the full article for FREE to find out more…

Miceller media accelerated Baylis–Hillman reaction
Balu Pawar, Vikas Padalkar, Kiran Phatangare, Sudhakar Nirmalkar and Atul Chaskar
Catal. Sci. Technol., 2011, DOI: 10.1039/C1CY00278C

Digg This
Reddit This
Stumble Now!
Share on Facebook
Bookmark this on Delicious
Share on LinkedIn
Bookmark this on Technorati
Post on Twitter
Google Buzz (aka. Google Reader)

HOT Article: Nanoparticle catalysis with the Midas touch

In this HOT article, the efforts of Graham Hutchings and co-workers to produce efficient catalysts based on gold and gold palladium nanoparticles supported on a variety of supports for the clean transformation of 1,2-propanediol (important in the synthesis of fine chemicals) to methyl lactate and methyl pyruvate are described.

Read the full article for FREE at:

Oxidative esterification of 1,2-propanediol using gold and gold-palladium supported nanoparticles
Gemma L. Brett, Peter J. Miedziak, Nikolaos Dimitratos, Jose A. Lopez-Sanchez, Nicholas F. Dummer, Ramchandra Tiruvalam, Christopher J. Kiely, David W. Knight, Stuart H. Taylor, David J. Morgan, Albert F. Carley and Graham J. Hutchings
Catal. Sci. Technol., 2011, Advance Article
DOI: 10.1039/C1CY00254F

Digg This
Reddit This
Stumble Now!
Share on Facebook
Bookmark this on Delicious
Share on LinkedIn
Bookmark this on Technorati
Post on Twitter
Google Buzz (aka. Google Reader)