Ralph Kraehnert

Dr. Ralph Kraehnert


Research Focus & Metrics

Academic Career Length

18Years (2009-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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2 August 2012 in Soft Matter
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Laemthong ChuenchomLaemthong Chuenchom
Laemthong Chuenchom
RKRalph Kraehnert
Ralph Kraehnert
Bernd SmarslyBernd Smarsly
Bernd Smarsly
Mesoporous carbons synthesized via a soft-templating approach have attracted much attention due to their easy synthesis and facile control over the derived pore structure. In analogy to soft-templating approaches for mesoporous metal oxides, their synthesis is based on a sequence of forming supramolecular arrangements of precursor molecules with the soft templates, stabilization of the precursor framework by polymerization and finally the removal of the templates. Using micelles of amphiphilic block-copolymers as templates, facile control over the morphology and size of mesopores can be achieved by e.g. controlling size, composition, and concentration of the template polymers or composition and degree of polymerization of the precursor. Moreover, soft templating approaches can be extended to obtain also carbon materials with hierarchical meso- and macroporosity. The additional macroporosity either can result from templating by polymer latex or is induced via macrophase separation. In this review, we describe recent progress and examples in the synthesis and application of mesoporous carbon materials based on soft-templating approaches. Moreover, we reiterate fundamental principles of self-aggregation, highlight proposed synthesis mechanisms and present means of controlling pore size, also in hierarchical meso–macroporous carbon materials.

8 May 2015 in ChemSusChem
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MBMichael Bernicke
Michael Bernicke
EOErik Ortel
Erik Ortel
TRTobias Reier
Tobias Reier
ABArno Bergmann
Arno Bergmann
JAJorge Ferreira de Araujo
Jorge Ferreira de Araujo
RKRalph Kraehnert
Ralph Kraehnert

18 November 2011 in Small
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Journal Article
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EOErik Ortel
Erik Ortel
AFAnna Fischer
Anna Fischer
Laemthong ChuenchomLaemthong Chuenchom
Laemthong Chuenchom
JPJörg Polte
Jörg Polte
Franziska EmmerlingFranziska Emmerling
Franziska Emmerling
RKRalph Kraehnert
Ralph Kraehnert

25 January 2019 in Nature Communications
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RSRoman Schmack
Roman Schmack
AFAlexandra Friedrich
Alexandra Friedrich
Evgenii KondratenkoEvgenii Kondratenko
Evgenii Kondratenko
JPJörg Polte
Jörg Polte
AWAxel Werwatz
Axel Werwatz
RKRalph Kraehnert
Ralph Kraehnert
Decades of catalysis research have created vast amounts of experimental data. Within these data, new insights into property-performance correlations are hidden. However, the incomplete nature and undefined structure of the data has so far prevented comprehensive knowledge extraction. We propose a meta-analysis method that identifies correlations between a catalyst’s physico-chemical properties and its performance in a particular reaction. The method unites literature data with textbook knowledge and statistical tools. Starting from a researcher’s chemical intuition, a hypothesis is formulated and tested against the data for statistical significance. Iterative hypothesis refinement yields simple, robust and interpretable chemical models. The derived insights can guide new fundamental research and the discovery of improved catalysts. We demonstrate and validate the method for the oxidative coupling of methane (OCM). The final model indicates that only well-performing catalysts provide under reaction conditions two independent functionalities, i.e. a thermodynamically stable carbonate and a thermally stable oxide support.

1 October 2012 in Chemistry of Materials
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Journal Article
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EOErik Ortel
Erik Ortel
SSSergey Sokolov
Sergey Sokolov
CZClaudia Zielke
Claudia Zielke
ILIver Lauermann
Iver Lauermann
SSSören Selve
Sören Selve
RKRalph Kraehnert
Ralph Kraehnert

10 March 2021 in ChemCatChem
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CWChristoph Wulf
Christoph Wulf
MBMatthias Beller
Matthias Beller
TBThomas Boenisch
Thomas Boenisch
ODOlaf Deutschmann
Olaf Deutschmann
SHSchirin Hanf
Schirin Hanf
DLDavid Linke
David Linke
Modern research methods produce large amounts of scientifically valuable data. Tools to process and analyze such data have advanced rapidly. Yet, access to large amounts of high‐quality data remains limited in many fields, including catalysis research. Implementing the concept of FAIR data (Findable, Accessible, Interoperable, Reusable) in the catalysis community would improve this situation dramatically. The German NFDI initiative (National Research Data Infrastructure) aims to create a unique research data infrastructure covering all scientific disciplines. One of the consortia, NFDI4Cat, proposes a concept that serves all aspects and fields of catalysis research. We present a perspective on the challenging path ahead. Starting out from the current state, research needs are identified. A vision for a integrating all research data along the catalysis value chain, from molecule to chemical process, is developed. Respective core development topics are discussed, including ontologies, metadata, required infrastructure, IP, and the embedding into research community. This Concept paper aims to inspire not only researchers in the catalysis field, but to spark similar efforts also in other disciplines and on an international level.