ChemCatChem

Cover image for Vol. 7 Issue 10

Early View (Online Version of Record published before inclusion in an issue)

Editor: Michael Rowan; Editorial Board Chairs: Uwe Bornscheuer, Luis A. Oro, Bert Weckhuysen

Impact Factor: 5.044

ISI Journal Citation Reports © Ranking: 2013: 26/136 (Chemistry Physical)

Online ISSN: 1867-3899

Associated Title(s): Advanced Synthesis & Catalysis, Angewandte Chemie International Edition, Chemistry - A European Journal, ChemBioChem, ChemElectroChem, ChemPhysChem, ChemSusChem

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  1. 1 - 27
  1. Full Papers

    1. Palladium and Bimetallic Palladium–Nickel Nanoparticles Supported on Multiwalled Carbon Nanotubes: Application to Carbon[BOND]Carbon Bond-Forming Reactions in Water

      Dr. Atsushi Ohtaka, Prof. José M. Sansano, Prof. Carmen Nájera, Dr. Izaskun Miguel-García, Dr. Ángel Berenguer-Murcia and Prof. Diego Cazorla-Amorós

      Article first published online: 25 MAY 2015 | DOI: 10.1002/cctc.201500164

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      From black to green: The catalytic activity of palladium and bimetallic Pd–Ni nanoparticles deposited on multiwalled carbon nanotubes as a catalyst for cross-coupling reactions in water under ligandless conditions is disclosed. These reaction conditions represent an environmentally friendly alternative to those previously reported for reactions in organic solvents.

  2. Minireviews

    1. Cycloadditions to Epoxides Catalyzed by Group III–V Transition-Metal Complexes

      Dr. Valerio D'Elia, Dr. Jérémie D. A. Pelletier and Prof. Dr. Jean-Marie Basset

      Article first published online: 25 MAY 2015 | DOI: 10.1002/cctc.201500231

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      Cycloadditions covered: The latest advances in catalytic cycloaddition reactions between epoxides and dipolarophiles catalyzed by group III–V transition metals are reported for homogeneous and heterogeneous systems. Insight is provided in terms of activation pathways, catalytic efficiency, and reaction mechanism.

  3. Concepts

    1. Building Electron-Precise Boron[BOND]Boron Single Bonds: Imposing Monogamy on a Promiscuous Element

      Prof. Dr. Holger Braunschweig, Dr. Rian D. Dewhurst and Dr. Silvia Mozo

      Article first published online: 18 MAY 2015 | DOI: 10.1002/cctc.201500219

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      Building B[BOND]B bonds: Historically, methods for the construction of B[BOND]B bonds are rare and most methods come with disadvantages. Thus, the development of new and efficient routes has become a major goal in synthetic chemistry. Recent efforts for the formation of electron-precise B[BOND]B single bonds are presented.

  4. Full Papers

    1. Immobilizing Systems Biocatalysis for the Selective Oxidation of Glycerol Coupled to In Situ Cofactor Recycling and Hydrogen Peroxide Elimination

      Dr. Javier Rocha-Martin, Andreína Acosta, Prof. Jose M. Guisan and Dr. Fernando López-Gallego

      Article first published online: 14 MAY 2015 | DOI: 10.1002/cctc.201500210

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      Three’s a crowd: The immobilization of three different enzymes on the same carrier surface allows the selective oxidation of glycerol to 1,3-dihydroacetone (DHA) coupled to in situ redox-cofactor recycling and H2O2 elimination.

  5. Communications

    1. Asymmetric Aldol Reaction of Chloral Catalyzed by Diarylprolinol

      Prof. Dr. Yujiro Hayashi, Shoya Watanabe, Yusuke Yasui and Shigenobu Umemiya

      Article first published online: 12 MAY 2015 | DOI: 10.1002/cctc.201500282

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      Getting in the pro-zone with pronucleophiles: The asymmetric cross-aldol reaction of chloral hydrate with aldehyde pronucleophiles catalyzed by a CF3-substituted diarylprolinol is accomplished to afford γ-trichloro-β-hydroxy aldehydes in good yields with excellent enantioselectivities. The resulting aldehyde products can be converted into chiral α-azido, α-(4-methyl)phenoxy, and α-fluoro esters without a loss in the diastereo- or enantioselectivities. Bn=benzyl.

  6. Full Papers

    1. Charge Transfer and Photocatalytic Activity in CuO/TiO2 Nanoparticle Heterojunctions Synthesised through a Rapid, One-Pot, Microwave Solvothermal Route

      Dr. Savio J. A. Moniz and Dr. Junwang Tang

      Article first published online: 12 MAY 2015 | DOI: 10.1002/cctc.201500315

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      Fast and furious yet economic synthesis: An extremely rapid, highly efficient, and cost effective strategy to improve the photocatalytic activity of TiO2 for both renewable fuel synthesis and environmental purification is reported. Microwave solvothermal synthesis was used to fabricate robust CuO/TiO2 heterojunctions with dramatically enhanced activity for both contaminant decomposition and photoelectrochemical water splitting compared to benchmark P25 TiO2.

  7. Communications

    1. So-Called “Metal-Free” Oxygen Reduction at Graphene Nanoribbons is in fact Metal Driven

      Lu Wang, Colin Hong An Wong, Bahareh Kherzi, Richard D. Webster and Prof. Martin Pumera

      Article first published online: 12 MAY 2015 | DOI: 10.1002/cctc.201500262

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      Going around in circles: Opening of carbon nanotubes (CNTs) by using KMnO4 and H2SO4 leads to graphene nanoribbons that are full of metallic impurities from the synthesis of the CNTs and MnO2 from the opening of the CNTs. These impurities (and not the ribbons) dominate in the observed “electrocatalysis” of the oxygen reduction reaction.

    2. Green Synthesis of Rice Bran Microsphere Catalysts Containing Natural Biopromoters

      Dr. Jian Sun, Prof. Hengyong Xu, Guoguo Liu, Pengfei Zhu, Ronggang Fan, Prof. Yoshiharu Yoneyama and Prof. Noritatsu Tsubaki

      Article first published online: 12 MAY 2015 | DOI: 10.1002/cctc.201500375

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      A whole new bran: Trace amounts of K, Mg, Mn, and Si minerals from rice bran can be directly incorporated into Fe@C microspherical cores as biopromoters to enhance the activity of the Fischer–Tropsch synthesis. Furthermore, rice bran can be used as a natural carbon source instead of a chemical carbon source, such as glucose, to fabricate a carbon microsphere support.

  8. Full Papers

    1. Robust and Recyclable Nonprecious Bimetallic Nanoparticles on Carbon Nanotubes for the Hydrogenation and Hydrogenolysis of 5-Hydroxymethylfurfural

      Lili Yu, Le He, Jin Chen, Jianwei Zheng, Dr. Linmin Ye, Dr. Haiqiang Lin and Prof. Dr. Youzhu Yuan

      Article first published online: 12 MAY 2015 | DOI: 10.1002/cctc.201500097

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      Benefits of selective memory: The alloying effect of nonprecious Ni[BOND]Fe on carbon nanotubes is beneficial to the selective hydrogenation and hydrogenolysis of 5-hydroxymethylfurfural, which gives high selectivities to 2,5-furandimethanol or 2,5-dimethylfuran depending on the reaction temperature. The catalyst can be easily separated with a magnet and reused several times without significant loss of activity.

    2. Surfactant-Exfoliated Highly Dispersive Pd-Supported Graphene Oxide Nanocomposite as a Catalyst for Aerobic Aqueous Oxidations of Alcohols

      Prof. Dr. Sadegh Rostamnia, Esmail Doustkhah, Dr. Ziba Karimi, Soraya Amini and Prof. Dr. Rafael Luque

      Article first published online: 12 MAY 2015 | DOI: 10.1002/cctc.201500126

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      Surfactants for stabilization: The addition of surfactants as efficient exfoliating agents of graphene oxide (GO) has a remarkable influence on the catalytic activity of Pd-supported GO nanohybrid materials for the aerobic aqueous oxidation of alcohols. The surfactant improves the solubility of reactants in water and prevents aggregation of the nanocomposite.

    3. Effect of VOx Species and Support on Coke Formation and Catalyst Stability in Nonoxidative Propane Dehydrogenation

      Dr. Sergey Sokolov, Dr. Victor Yu. Bychkov, Dr. Mariana Stoyanova, Dr. Uwe Rodemerck, Dr. Ursula Bentrup, Dr. David Linke, Dr. Yurij P. Tyulenin, Prof. Vladimir N. Korchak and Dr. Evgenii V. Kondratenko

      Article first published online: 12 MAY 2015 | DOI: 10.1002/cctc.201500151

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      VOx takes it all: The kind of VOx species determines the rate of carbon formation in nonoxidative dehydrogenation of propane over VOx/SiO2–Al2O3. Larger species result in a higher rate, and the on-stream dehydrogenation stability is consequently reduced.

    4. Visible-Light-Assisted Selective Catalytic Reduction of Nitric Oxide with Ammonia over Dye-Modified Titania Photocatalysts

      Akira Yamamoto, Dr. Kentaro Teramura, Dr. Saburo Hosokawa, Prof. Dr. Tetsuya Shishido and Prof. Dr. Tsunehiro Tanaka

      Article first published online: 12 MAY 2015 | DOI: 10.1002/cctc.201500207

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      Light-bulb moment: Dye-sensitized TiO2 photocatalysts show a high photocatalytic activity for the selective catalytic reduction of NO with NH3 under visible-light irradiation. Diffuse reflectance infrared Fourier transform spectroscopy and reactions under various conditions reveal that the surface NO2 species is an intermediate in the reaction and reacts with adsorbed NH3 under visible-light irradiation to form N2 selectively.

    5. Hierarchical Ag/Ag2S/CuS Ternary Heterostructure Composite as an Efficient Visible-Light Photocatalyst

      Yunhan Shi, Dr. Yajie Chen, Prof. Guohui Tian, Liyang Wang, Yuting Xiao and Prof. Honggang Fu

      Article first published online: 8 MAY 2015 | DOI: 10.1002/cctc.201500121

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      Catalysis with a silver lining: A hierarchical Ag/Ag2S/CuS ternary composite is synthesized successfully by a cation-exchange process and subsequent in situ light reduction. The prepared ternary composite exhibits a significant degradation ability and excellent stability for the elimination of some hazardous or recalcitrant intermediates under visible-light irradiation because of the effective charge separation.

  9. Reviews

    1. Biomass-Derived Porous Carbon Materials: Synthesis and Catalytic Applications

      Dr. Sudipta De, Dr. Alina Mariana Balu, Dr. Jan C. van der Waal and Prof. Rafael Luque

      Article first published online: 7 MAY 2015 | DOI: 10.1002/cctc.201500081

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      Renewable feedstocks for sustainable chemistry: Developing advanced materials from renewable precursors is the way forward to a sustainable future. This contribution discusses the synthesis and functionalization of porous carbonaceous materials and their wide range of catalytic applications in organic synthesis, biomass transformation, fuel cells, electrocatalysis, and photocatalysis.

  10. Full Papers

    1. Comparison of the Full Catalytic Cycle of Hydroformylation Mediated by Mono- and Bis-Ligated Triphenylphosphine–Rhodium Complexes by Using DFT Calculations

      Ivo Jacobs, Prof. Dr. Bas de Bruin and Prof. Dr. Joost N. H. Reek

      Article first published online: 7 MAY 2015 | DOI: 10.1002/cctc.201500087

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      Mono versus bis: The difference in reactivity between mono- and bis-ligated rhodium species in hydroformylation is investigated systematically by using DFT calculations. The results confirm that monophosphine rhodium complexes have an intrinsically higher activity than bisphosphine rhodium complexes.

  11. Conference Reports

    1. Weimar 2015: Catalysing Tomorrow’s Solutions

      Dr. Barthel Engeldahl, Prof. Mehtap Özaslan, Dr. Roland Marschall, Dr. Marcus Rose, Dr. Stefan Kaluza, Juliane Titus and Dr. Christoph Sprung

      Article first published online: 7 MAY 2015 | DOI: 10.1002/cctc.201500435

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      The YounGeCatS put the cat in catalysis: The 48th annual meeting of the German Catalysis Society (GeCatS), hosted by DECHEMA, was recently held in Weimar. There were numerous presentations, from keynotes to posters, put together to form a very attractive program depicting the catalysis research in all its breadth.

  12. Communications

    1. Photoredox Catalysis of Intramolecular Cyclizations with a Reusable Silica-Bound Ruthenium Complex

      Dr. Gregory J. Barbante, Dr. Trent D. Ashton, Dr. Egan H. Doeven, Dr. Frederick M. Pfeffer, Dr. David J. D. Wilson, Dr. Luke C. Henderson and Dr. Paul S. Francis

      Article first published online: 7 MAY 2015 | DOI: 10.1002/cctc.201500304

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      R-u immobilized? A stable, reusable photoredox catalyst is prepared by coupling a carboxylic acid functionalized ruthenium complex to amine-functionalized silica beads and applied to the intramolecular cyclization of 2-benzylidenehydrazinecarbothioamides to give 5-phenyl-1,3,4-thiadiazol-2-amines. The immobilized catalyst can be readily removed from the reaction product by filtration and can be used eight times without loss of catalytic activity.

  13. Highlights

    1. Novelty in Complexity: Relationship between Small Peptides, Pd Nanoparticles, and Catalyst Characteristics

      Prof. Árpád Molnár

      Article first published online: 27 APR 2015 | DOI: 10.1002/cctc.201500108

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      Bioinspired research: The Knecht group has recently developed specific peptide-capped Pd nanoparticle catalysts. The catalyst design, inspired by nature, and the complex approach with the use of varied characterization techniques is of great interest and offers new perspectives, as well as great opportunities, for the development of new catalyst materials for future sustainable developments

  14. Communications

    1. Synthesis of Biaryls by Decarboxylative Hiyama Coupling

      Dr. Dmitry Katayev, Benjamin Exner and Prof. Dr. Lukas J. Gooßen

      Article first published online: 21 APR 2015 | DOI: 10.1002/cctc.201500068

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      Three metals are better than one: A trimetallic Pd/Cu/Ag system allows the decarboxylative Hiyama coupling of ortho-substituted aryl carboxylates with trialkoxyarylsilanes in high yields. A Pd/N-heterocyclic carbene complex catalyzes the cross-coupling reaction with silver carbonate supporting reoxidation of the complex. Copper(II) fluoride acts as decarboxylaton catalyst, stoichiometric oxidant, and fluoride source, necessary to activate organosilanes. DMAc=Dimethylacetamide.

  15. Highlights

    1. Asymmetric Nickel-Catalysed Cross-Hydrovinylation of Two Terminal Alkenes

      Prof. Dr. Gerhard Hilt

      Article first published online: 20 APR 2015 | DOI: 10.1002/cctc.201500177

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      Pushing the boundaries: The asymmetric 1,2-hydrovinylation of styrene derivatives with terminal alkenes is realised by using a nickel catalyst and specially designed chiral NHC ligands to achieve a new level of complexity for the tail-to-tail cross-coupling of alkenes by C[BOND]H activation.

  16. Full Papers

    1. A Comprehensive Study of Formic Acid Oxidation on Palladium Nanocrystals with Different Types of Facets and Twin Defects

      Dr. Sang-Il Choi, Dr. Jeffrey A. Herron, Dr. Jessica Scaranto, Hongwen Huang, Yi Wang, Dr. Xiaohu Xia, Tian Lv, Jinho Park, Hsin-Chieh Peng, Prof. Manos Mavrikakis and Prof. Younan Xia

      Article first published online: 13 APR 2015 | DOI: 10.1002/cctc.201500094

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      Which mechanism on which facet? This work systematically evaluates the activities of Pd nanocrystals with different types of facets and twin defects towards formic acid oxidation.

    2. Facile Synthesis of Crystalline Polymeric Carbon Nitrides with an Enhanced Photocatalytic Performance under Visible Light

      Qinghua Liang, Prof. Zheng-Hong Huang, Prof. Feiyu Kang and Prof. Quan-Hong Yang

      Article first published online: 25 MAR 2015 | DOI: 10.1002/cctc.201500076

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      Easy does it: Crystalline polymeric graphitic carbon nitrides with an enhanced visible-light-driven photocatalytic performance are prepared by heating a mixture of melamine and lithium halides.

    3. Surface Modification of Carbon Nitride Polymers by Core–Shell Nickel/Nickel Oxide Cocatalysts for Hydrogen Evolution Photocatalysis

      Guigang Zhang, Guosheng Li and Prof. Xinchen Wang

      Article first published online: 12 MAR 2015 | DOI: 10.1002/cctc.201500069

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      Hard core catalyst: A Ni/NiO core–shell nanostructure is prepared successfully by a facile immersion strategy. We use cost-acceptable nickel as an efficient cocatalyst to replace noble-metal Pt to facilitate sustainable photocatalytic hydrogen evolution by polymeric carbon nitride semiconductors.

    4. Promoting Visible-Light Photocatalysis with Palladium Species as Cocatalyst

      Xiuzhen Li, Nan Zhang and Prof. Yi-Jun Xu

      Article first published online: 6 MAR 2015 | DOI: 10.1002/cctc.201500009

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      Duality is part of life: Ternary In2S3– (reduced graphene oxide–palladium) composites show enhanced visible-light photoactivity with the introduction of palladium nanoparticles, which act as dual cocatalyst with reduced graphene oxide.

  17. Communications

    1. Nitrogen-Doped Annealed Nanodiamonds with Varied sp2/sp3 Ratio as Metal-Free Electrocatalyst for the Oxygen Reduction Reaction

      Yansong Zhu, Yangming Lin, Bingsen Zhang, Junfeng Rong, Baoning Zong and Prof. Dang Sheng Su

      Article first published online: 2 FEB 2015 | DOI: 10.1002/cctc.201402930

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      Logical by name logical by nature: Nitrogen-doped annealed nanodiamonds (NAND) showed high catalytic activity for the oxygen reduction reaction. More importantly, NAND displaying stability is extremely superior to other nitrogen-doped nanocarbon materials due to transforming carbon from sp3 to sp2 during the electrochemical cycling test.

  18. Full Papers

    1. Methane Catalytic Combustion over Hierarchical Pd@CeO2/Si-Al2O3: Effect of the Presence of Water

      Dr. Matteo Monai, Dr. Tiziano Montini, Dr. Chen Chen, Dr. Emiliano Fonda, Prof. Raymond J. Gorte and Prof.Dr. Paolo Fornasiero

      Article first published online: 30 OCT 2014 | DOI: 10.1002/cctc.201402717

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      A bridge over troubled water: Excess water has a detrimental effect on the performance of hierarchical Pd@CeO2/Si-Al2O3 under methane combustion. The origin of this effect has been studied by a combination of reactivity experiments, IR spectroscopy and operando EXAFS spectroscopy, observing that the formation of OH groups on the surface of partially reduced CeO2 hinders O spillover and favors progressive formation of reduced Pd.

    2. Heterogeneously Catalyzed Hydrogenation of Squalene to Squalane under Mild Conditions

      Valerica Pandarus, Rosaria Ciriminna, Prof. Serge Kaliaguine, Dr. François Béland and Dr. Mario Pagliaro

      Article first published online: 26 SEP 2014 | DOI: 10.1002/cctc.201402668

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      Sharkless squalane: Full chemoselective hydrogenation of highly unsaturated squalene into squalane is achieved over a sol–gel-entrapped palladium catalyst SiliaCat Pd0. The mild conditions required (1 atm, 30 °C, 0.5–1.0 mol % catalyst) and the catalyst stability and recyclability are a step towards replacing shark-liver oil as a source of squalene in the medicinal and cosmetic industries with alternative sources such as sugarcane.

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