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Institution

DECHEMA

NonprofitFrankfurt am Main, Germany
About: DECHEMA is a nonprofit organization based out in Frankfurt am Main, Germany. It is known for research contribution in the topics: Corrosion & Oxide. The organization has 756 authors who have published 1307 publications receiving 25693 citations.
Topics: Corrosion, Oxide, Coating, Alloy, Catalysis


Papers
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Journal ArticleDOI
24 Mar 2021
TL;DR: IndXovr as discussed by the authors is a crossover index which enables the determination of crossover direction from state of charge data for the negative and positive half-cells and therewith identification of the half-cell in which predominant self-discharge occurs.
Abstract: Membranes play a crucial role in efficiency and longevity of flow batteries. Vanadium flow batteries suffer self-discharge and capacity fading due to crossover of electrolyte components through the membrane from one battery half-cell to the other. We consider the impact of vanadium species crossing ion exchange membranes on state of charge of the battery and we present a simple method to determine crossoverll open circuit potential measurements. State of s. State of charge for the negative and positive half-cell is simulated based on assumptions and simplifications for cation and anion exchange membranes and different crossover parameters. We introduce a crossover index "IndXovr" which enables the determination of crossover direction from state of charge data for the negative and positive half-cell and therewith identification of the half-cell in which predominant self-discharge occurs. Furthermore IndXovr allows statements on crossover amount in dependence on state of operation. Simulated case studies are compared to experimental state of charge values estimated from half-cell potential measurements. Our results reveal that half-cell potential monitoring respectively half-cell SOC estimation, is a simple and suitable tool for the identification of crossover direction and relative amount of crossover in VFB.

7 citations

Journal ArticleDOI
TL;DR: The current production from the alkaline methanol electrooxidation reaction does not reach a steady-state on a smooth platinum catalyst under potentiostatic conditions and a local pH-shift near the catalyst surface is found accountable for the observed current loss.
Abstract: The current production from the alkaline methanol electro-oxidation reaction does not reach a steady state on a smooth platinum catalyst under potentiostatic conditions. We investigated two possibl...

7 citations

Journal ArticleDOI
TL;DR: In this article, the kinetic data of the poisoning of a porous noble metal carrier-type catalyst by phosphorus were determined during the total oxidation of ethane with air, and an appropriate mathematical model for the reaction system including internal diffusion in the porous pellet was developed.

6 citations

Journal ArticleDOI
TL;DR: In this article, a holistic kinetic model for the gas phase photocatalytic oxidation of HCl to Cl2 was applied for process optimization, which is a powerful tool for process optimisation.
Abstract: The kinetic modeling of photocatalytic reactions is a powerful tool for process optimization. We applied a holistic kinetic model for the gas-phase photocatalytic oxidation of HCl to Cl2 to identif...

6 citations


Authors

Showing all 760 results

NameH-indexPapersCitations
Wolf B. Frommer10534530918
Michael W. Anderson10180863603
João Rocha93152149472
Martin Muhler7760625850
Michael Hunger6029511370
Ivars Neretnieks442247159
Michael Schütze403436311
Jens Schrader381294239
Roland Dittmeyer312063762
Lei Li291984003
Dirk Holtmann291073033
Lasse Greiner26741994
Klaus-Michael Mangold23571590
A. Rahmel23591967
Gerhard Kreysa22781305
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20231
20227
202145
202053
201949
201844