Fachgebiet Technische Chemie
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22 Submissions in this community.

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Property-performance relationships of catalysts in the oxidative coupling of methane

Schmack, Roman (2017)

The catalytic oxidative coupling of methane (OCM) is a „dream reaction“ of heterogeneous catalysis, as it provides a direct conversion route of methane to the value-added and easily transportable C...

Sustainable biomass potential for biofuels

Lossau, Selma (2017)

There is a large interest in biofuels in Brazil and India as a substitute to fossil fuels, with a purpose of enhancing energy security and promoting rural development. The critical question is whet...

In situ observation of reactive oxygen species forming on oxygen-evolving iridium surfaces

Pfeifer, Verena; Jones, Travis E.; Velasco Vélez, Juan J.; Arrigo, Rosa; Piccinin, Simone; Hävecker, Michael; Knop-Gericke, Axel; Schlögl, Robert (2017)

Water splitting performed in acidic media relies on the exceptional performance of iridium-based materials to catalyze the oxygen evolution reaction (OER). In the present work, we use in situ X-ray...

Reactive oxygen species in iridium-based OER catalysts

Pfeifer, Verena; Jones, Travis E.; Wrabetz, Sabine; Massué, Cyriac; Velasco Vélez, Juan J.; Arrigo, Rosa; Scherzer, Michael; Piccinin, Simone; Hävecker, Michael; Knop-Gericke, Axel; Schlögl, Robert (2016)

Tremendous effort has been devoted towards elucidating the fundamental reasons for the higher activity of hydrated amorphous IrIII/IV oxyhydroxides (IrOx) in the oxygen evolution reaction (OER) in ...

Identification of reactive oxygen species in iridium-based OER catalysts by in situ photoemission and absorption spectroscopy

Pfeifer, Verena (2017)

A change in our energy supply from fossil fuels to intermittent renewables requires energy storage capacity. Part of this capacity may be delivered from chemical energy conversion relying on H2 as ...

CO2 utilisation today : report 2017

Zimmermann, Arno; Kant, Marvin; Strunge, Till; Tzimas, Evangelos; Leitner, Walter; Arlt, Wolfgang; Styring, Peter; Arning, Katrin; Ziefle, Martina; Meys, Raoul; Kätelhön, Arne; Bardow, André; Castillo Castillo, Arturo; Flanders, Nicholas; Marinić, Saša; Mechnig, Stefan-Paul (2017)

This report provides perspectives on CO2 utilisation from a variety of angles: interviews with scientists, essays on business, environment and social impact, as well as stories from CO2-utilising c...

Innovationsprojekte schneller zum Erfolg führen

Streit, Bettina Marianne von (2016)

Das Ziel der vorliegenden Arbeit ist die Entwicklung einer Entscheidungshilfe zur optimalen Methodenauswahl, um Entwicklungsprozesse in der chemischen Industrie zu beschleunigen. Die Forschungslück...

Water oxidation catalysts

Zachäus, Carolin (2016)

Climate change has been widely recognized as a major environmental problem facing the world today. According to IPCC, this is related to the increase in greenhouse gas concentrations, mainly as a r...

Mesoporous oxides as efficient catalysts for the electrocatalytic oxygen evolution reaction (OER)

Bernicke, Michael (2016)

Hydrogen is considered an important energy carrier and feedstock for industrial applications. The generation of hydrogen can be realised by electrocatalytic water splitting. However, the efficiency...

Asymmetric reduction of ketones with recombinant E. coli whole cells in neat substrates

Jakoblinnert, Andre; Mladenov, Radoslav; Paul, Albert; Sibilla, Fabrizio; Schwaneberg, Ulrich; Ansorge-Schumacher, Marion B.; de María, Pablo Domínguez (2011)

The asymmetric reduction of ketones is performed by using lyophilized whole cells in neat substrates with defined water activity (aw). Ketones and alcohols prone to be unstable in aqueous media can...

Iron-based pre-catalyst supported on polyformamidine for C-C bond formation

Enthaler, Stephan; Krackl, Sebastian; Epping, Jan Dirk; Eckhardt, Björn; Weidner, Steffen M.; Fischer, Anna (2012)

In the present study the incorporation of iron into an organic polymer, composed of formamidine subunits [R–N[double bond, length as m-dash]C(H)–NH–R], has been examined. The catalytic ability of t...

Nitrogen-doped coatings on carbon nanotubes and their stabilizing effect on Pt nanoparticles

Tuaev, Xenia; Paraknowitsch, Jens Peter; Illgen, René; Thomas, Arne; Strasser, Peter (2012)

A homogeneous coating of nitrogen-doped carbon on carbon nanotubes is performed using ionic liquids. The N-doped material is employed as a support for nanoparticles. Electrochemical degradation beh...

Bifunctional anode catalysts for direct methanol fuel cells

Rossmeisl, Jan; Ferrin, Peter; Tritsaris, Georgios A.; Nilekar, Anand Udaykumar; Koh, Shirlaine; Bae, Sang Eun; Brankovic, Stanko R.; Strasser, Peter; Mavrikakis, Manos (2012)

Using the binding energy of OH* and CO* on close-packed surfaces as reactivity descriptors, we screen bulk and surface alloy catalysts for methanol electro-oxidation activity. Using these two descr...

The preparation, characterisation and electronic structures of 2,4-pentadiynylnitrile (cyanobutadiynyl) complexes

Bock, Sören; Eaves, Samantha G.; Parthey, Matthias; Kaupp, Martin; Le Guennic, Boris; Halet, Jean-François; Yufit, Dmitry S.; Howard, Judith A. K.; Low, Paul J. (2013)

Convenient preparative routes to mononuclear ruthenium complexes containing the 2,4-pentadiynylnitrile, or cyanobutadiynyl, ligand are described. The electronic properties of the [C5N]− ligand are ...

Phosphorus-doped porous carbons as efficient electrocatalysts for oxygen reduction

Wu, Jiao; Yang, Zhenrong; Li, Xiaowei; Sun, Qijun; Jin, Chao; Strasser, Peter; Yang, Ruizhi (2013)

Efficient electrocatalysts for the oxygen reduction reaction (ORR) play a critical role in the performance of fuel cells and metal–air batteries. In this study, we report a facile synthesis of phos...

Electrochemical water splitting by layered and 3D cross-linked manganese oxides: correlating structural motifs and catalytic activity

Bergmann, Arno; Zaharieva, Ivelina; Dau, Holger; Strasser, Peter (2013)

Manganese based precious metal-free electrocatalysts for the oxygen evolution reaction (OER) are promising materials for energy storage systems based on dark or photo-coupled water electrolysis, be...

On the faradaic selectivity and the role of surface inhomogeneity during the chlorine evolution reaction on ternary Ti-Ru-Ir mixed metal oxide electrocatalysts

Zeradjanin, Aleksandar R.; Menzel, Nadine; Schuhmann, Wolfgang; Strasser, Peter (2014)

The faradaic selectivity of the chlorine evolution reaction (CER) and oxygen evolution reaction (OER) on the industrially important Ti–Ru–Ir mixed metal oxide is discussed. Absolute evolution rates...

Quantum-chemical insights into mixed-valence systems: within and beyond the Robin-Day scheme

Parthey, M.; Kaupp, M. (2014)

In mixed-valence (MV) systems essentially identical, more or less electronically coupled, redox centres are brought into formally different oxidation states by removal or addition of an electron. D...

IrOx core-shell nanocatalysts for cost- and energy-efficient electrochemical water splitting

Nong, Hong Nhan; Gan, Lin; Willinger, Elena; Teschner, Detre; Strasser, Peter (2014)

A family of dealloyed metal–oxide hybrid (M1M2@M1Ox) core@shell nanoparticle catalysts is demonstrated to provide substantial advances toward more efficient and less expensive electrolytic water sp...

Efficient C-C bond splitting on Pt monolayer and sub-monolayer catalysts during ethanol electro-oxidation: Pt layer strain and morphology effects

Loukrakpam, Rameshwori; Yuan, Qiuyi; Petkov, Valeri; Gan, Lin; Rudi, Stefan; Yang, Ruizhi; Huang, Yunhui; Brankovic, Stanko R.; Strasser, Peter (2014)

Efficient catalytic C–C bond splitting coupled with complete 12-electron oxidation of the ethanol molecule to CO2is reported on nanoscale electrocatalysts comprised of a Pt monolayer (ML) and sub-m...