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Dive into the research topics where Cathrin Alexandra Welker-Nieuwoudt is active.

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Featured researches published by Cathrin Alexandra Welker-Nieuwoudt.


Chemcatchem | 2013

Towards Physical Descriptors of Active and Selective Catalysts for the Oxidation of n‐Butane to Maleic Anhydride

Maik Eichelbaum; Robert Glaum; Michael Hävecker; Knut Wittich; Christian Heine; Heiner Schwarz; Cornelia-Katharina Dobner; Cathrin Alexandra Welker-Nieuwoudt; Annette Trunschke; Robert Schlögl

Based on our newly developed microwave cavity perturbation technique, the microwave conductivity of diverse vanadium(III), (IV), and (V) phosphate catalysts was measured under reaction conditions for the selective oxidation of n‐butane. The conductivity response on the gas phase was identified as a very sensitive measure for the redox kinetics, reversibility, and stability of the samples, which are important prerequisites for highly selective and active catalysts. The sensitivity achieved by our method was comparable to surface‐sensitive methods such as X‐ray photoelectron spectroscopy, whereas more conventional analytic techniques such as X‐ray diffractometry or Raman spectroscopy only indicated the stability of the bulk crystal phase under the same reaction conditions.


Chemie Ingenieur Technik | 2012

Resource-Efficient Alkane Selective Oxidation on New Crystalline Solids: Searching for Novel Catalyst Materials

Robert Glaum; Cathrin Alexandra Welker-Nieuwoudt; Cornelia-Katharina Dobner; Maik Eichelbaum; Falk Gruchow; Christian Heine; Andrey Karpov; Rüdiger Kniep; Frank Rosowski; Robert Schlögl; Stephan Andreas Schunk; Sven Titlbach; Annette Trunschke


Archive | 2013

PROCESS FOR HETEROGENEOUSLY CATALYZED GAS PHASE PARTIAL OXIDATION OF (METH)ACROLEIN TO (METH)ACRYLIC ACID

Cathrin Alexandra Welker-Nieuwoudt; Andrey Karpov; Frank Rosowski; Klaus Joachim Mueller-Engel; Herbert Vogel; A. Drochner; Nina Blickhan; Nadine Duerr; Tim Jekewitz; Nadine Menning; Tina Petzold; Sabine Schmidt


Chemistry of Materials | 2017

Statistical analysis of coordination environments in oxides

David Waroquiers; Xavier Gonze; Gian-Marco Rignanese; Cathrin Alexandra Welker-Nieuwoudt; Frank Rosowski; Michael Göbel; Stephan Schenk; Peter Degelmann; Rute André; Robert Glaum; Geoffroy Hautier


Archive | 2014

PROCESS FOR PRODUCING A CATALYTICALLY ACTIVE COMPOSITION BEING A MIXTURE OF A MULTIELEMENT OXIDE COMPRISING THE ELEMENTS MO AND V AND AT LEAST ONE OXIDE OF MOLYBDENUM

Cathrin Alexandra Welker-Nieuwoudt; Cornelia Katharina Dobner; Christian Walsdorff; Klaus Joachim Mueller-Engel; Josef Macht


Archive | 2014

CATALYST FOR PREPARATION OF AN UNSATURATED CARBOXYLIC ACID BY GAS PHASE OXIDATION OF AN UNSATURATED ALDEHYDE

Cathrin Alexandra Welker-Nieuwoudt; Cornelia Katharina Dobner; Holger Borchert; Ulrich Hammon; Josef Macht; Andrey Karpov; Christian Walsdorff


Archive | 2014

MECHANICALLY STABLE HOLLOW CYLINDRICAL SHAPED CATALYST BODIES FOR GAS PHASE OXIDATION OF AN ALKENE TO AN UNSATURATED ALDEHYDE AND/OR AN UNSATURATED CARBOXYLIC ACID

Josef Macht; Christian Walsdorff; Cornelia Katharina Dobner; Stefan Lipp; Cathrin Alexandra Welker-Nieuwoudt; Ulrich Hammon; Holger Borchert


Archive | 2012

Heterogeneously catalyzed gas phase partial oxidation of (meth)acrolein to (meth)acrylic acid using a catalytically active multimetal oxide mass

Herbert Vogel; A. Drochner; Cathrin Alexandra Welker-Nieuwoudt; Andrey Karpov; Frank Rosowski; Klaus Joachim Müller-Engel; Nina Blickhan; Nadine Duerr; Tim Jekewitz; Nadine Menning; Tina Petzold; Sabine Schmidt


Archive | 2013

Preparing catalytically active composition useful for preparing a catalyst, comprises e.g. thermally treating geometrical precursor bodies formed by a mixture obtained by uniformly mixing e.g. a spray-dried powder and molybdenum oxide

Cathrin Alexandra Welker-Nieuwoudt; Cornelia Katharina Dobner; Walsdorff Christian; Joachim Dr. Müller-Engel Klaus; Josef Macht


Archive | 2016

Method for producing a bismuth- and tungsten-containing multielement oxide by means of co-precipitation

Stefan Wrobel; Wolfgang Hellerich; Cathrin Alexandra Welker-Nieuwoudt; Cornelia Katharina Dobner

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