Johannes Stangl, M.Sc.

M.Sc.JohannesStangl

Gebäude:Hubland Süd C4

Raum:005

Arbeitsgebiet:
Untersuchungen zu Stabilität und Prozessierung von MOFs

Finanzierung:
Deutsche Froschungsgemeinschaft

Publikationsliste

Stangl, J., Dietrich, D., Sedykh, A. E., Janiak, C. & Müller-Buschbaum, K.Luminescent metal–organic framework mixed matrix membranes for humidity sensing in real status analysis.J. Mater. Chem. C(2018).doi:10.1039/C8TC01454J
[ BibTeX ][ DOI ]

@article{noauthororeditor, author = {Stangl, Johannes and Dietrich, Dennis and Sedykh, Alexander E. and Janiak, Christoph and Müller-Buschbaum, Klaus}, journal = {J. Mater. Chem. C}, keywords = {ak alex stangl}, title = {Luminescent metal–organic framework mixed matrix membranes for humidity sensing in real status analysis}, year = 2018 }
Schäfer, H., Kupper, K., Schmidt, M., Müller-Buschbaum, K., Stangl, J., Daum, D., Steinhart, M., Schulz-Kolbel, C., Han, W., Wollschlager, J., Krupp, U., Hou, P. & Liu, X.Steel-based electrocatalysts for efficient and durable oxygen evolution in acidic media.Catal. Sci. Technol.8,2104-2116(2018).
[ BibTeX ][ DOI ]

@article{C7CY02194A, abstract = {High overpotentials{,} particularly an issue of common anode materials{,} hamper the process of water electrolysis for clean energy generation. Thanks to immense research efforts{,} up-to-date oxygen evolution electrocatalysts based on earth-abundant elements work efficiently and stably in neutral and alkaline regimes. However{,} non-noble metal-based anode materials that can withstand low pH regimes are considered to be an indispensable prerequisite for the water splitting to succeed in the future. All oxygen-evolving electrodes working durably and actively in acids contain Ir at least as an additive. Due to their scarcity and high acquisition costs{,} noble elements like Pt{,} Ru and Ir need to be replaced by earth-abundant elements. We have evaluated a Ni-containing stainless steel for use as an oxygen-forming electrode in diluted H2SO4. Unmodified Ni42 steel showed a significant weight loss after long-term OER polarization experiments. Moreover{,} a substantial loss of the OER performance of the untreated steel specimen seen in linear sweep voltammetry measurements turned out to be a serious issue. However{,} upon anodization in LiOH{,} Ni42 alloy was rendered in OER electrocatalysts that exhibit{,} under optimized synthesis conditions{,} stable overpotentials down to 445 mV for a current density of 10 mA cm-2 at pH 0. Even more importantly{,} the resulting material has been proven to be robust upon long-term usage (weight loss: 20 [small mu ]g mm-2 after 50 ks of chronopotentiometry at pH 1) towards OER in H2SO4. Our results suggest that electrochemical oxidation of Ni42 steel in LiOH (sample Ni42Li205) results in the formation of a metal oxide-containing outer zone that supports solution route-based oxygen evolution in the acidic regime accompanied by good stability of the catalyst.}, author = {Schäfer, Helmut and Kupper, Karsten and Schmidt, Mercedes and Müller-Buschbaum, Klaus and Stangl, Johannes and Daum, Diemo and Steinhart, Martin and Schulz-Kolbel, Christine and Han, Weijia and Wollschlager, Joachim and Krupp, Ulrich and Hou, Peilong and Liu, Xiaogang}, journal = {Catal. Sci. Technol.}, keywords = {ak stangl}, number = 8, pages = {2104-2116}, publisher = {The Royal Society of Chemistry}, title = {Steel-based electrocatalysts for efficient and durable oxygen evolution in acidic media}, volume = 8, year = 2018 }
Kraft, A., Stangl, J., Krause, A. -M., Müller-Buschbaum, K. & Beuerle, F.Supramolecular frameworks based on [60]fullerene hexakisadducts.(2017).
[ BibTeX ]

@article{kraft2017supramolecular, author = {Kraft, Andreas and Stangl, Johannes and Krause, Ana-Maria and Müller-Buschbaum, Klaus and Beuerle, Florian}, keywords = {ak stangl}, publisher = {Beilstein-Institut}, title = {Supramolecular frameworks based on [60]fullerene hexakisadducts}, type = {Full Research Paper}, year = 2017 }
Kraft, A., Roger, C., Schmidt, D., Stangl, J., Müller-Buschbaum, K. & Beuerle, F.Metal-Based Diversity for Crystalline Metal-Fullerene Frameworks.Chemistry – A European Journal23,15864--15868(2017).
[ BibTeX ][ DOI ]

@article{CHEM:CHEM201703709, abstract = {Four different three-dimensional metal–fullerene frameworks were synthesized through polymerization of two C60-derived dodecaacids with varying alkyl spacers in the presence of Ca2+, Cu2+ or Cd2+ ions. Structural analysis of the frameworks was performed by single-crystal X-ray diffraction and porosity of the materials was investigated by sorption measurements.}, author = {Kraft, Andreas and Roger, Chantal and Schmidt, David and Stangl, Johannes and Müller-Buschbaum, Klaus and Beuerle, Florian}, journal = {Chemistry – A European Journal}, keywords = {ak stangl}, number = 63, pages = {15864--15868}, title = {Metal-Based Diversity for Crystalline Metal-Fullerene Frameworks}, volume = 23, year = 2017 }
Kraft, A., Roth, P., Schmidt, D., Stangl, J., Müller-Buschbaum, K. & Beuerle, F.Three-Dimensional Metal–Fullerene Frameworks.Chemistry – A European Journal22,5982--5987(2016).
[ BibTeX ][ DOI ]

@article{CHEM:CHEM201505137, abstract = {Hexakis-substituted [60]fullerene adducts with icosahedral symmetry provide an unprecedented scaffold for the spatial arrangement of twelve functional groups with high geometric precision. This unique molecular symmetry identifies such polyfunctional organic building blocks as potential highly connective linkers for coordination polymer and metal–organic framework synthesis. Hereby, the linker exhibits a higher connectivity than the metal ions and with the main connectivity based on the ligand, this can create a new type of inversely cross-linked framework. Two hexakis adducts bearing either twelve glycolic acid or 3-hydroxypropionic acid side chains attached to its malonate units were incorporated as organic connectivity centers in the first fullerene-containing three-dimensional frameworks by coordination with Zn2+.}, author = {Kraft, Andreas and Roth, Patrick and Schmidt, David and Stangl, Johannes and Müller-Buschbaum, Klaus and Beuerle, Florian}, journal = {Chemistry – A European Journal}, keywords = {ak stangl}, number = 17, pages = {5982--5987}, title = {Three-Dimensional Metal–Fullerene Frameworks}, volume = 22, year = 2016 }
Schäfer, H., Chevrier, D. M., Kuepper, K., Zhang, P., Wollschlaeger, J., Daum, D., Steinhart, M., Heß, C., Krupp, U., Müller-Buschbaum, K., Stangl, J. & Schmidt, M.X20CoCrWMo10-9//Co3O4: a metal-ceramic composite with unique efficiency values for water-splitting in the neutral regime.Energy Environ. Sci.9,2609-2622(2016).
[ BibTeX ][ DOI ]

@article{C6EE01304J, abstract = {Water splitting allows the storage of solar energy into chemical bonds (H2 + O2) and will help to implement the urgently needed replacement of limited available fossil fuels. In particular{,} in a neutral environment electrochemically initiated water splitting suffers from low efficiency due to high overpotentials ([small eta]) caused by the anode. Electro-activation of X20CoCrWMo10-9{,} a Co-based tool steel resulted in a new composite material (X20CoCrWMo10-9//Co3O4) that catalyzes the anode half-cell reaction of water electrolysis with a so far{,} unequalled effectiveness. The current density achieved with this new anode in pH 7 corrected 0.1 M phosphate buffer is over a wide range of [small eta] around 10 times higher compared to recently developed{,} up-to-date electrocatalysts and represents the benchmark performance which advanced catalysts show in regimes that support water splitting significantly better than pH 7 medium. X20CoCrWMo10-9//Co3O4 exhibited electrocatalytic properties not only at pH 7{,} but also at pH 13{,} which are much superior to the ones of IrO2-RuO2{,} single-phase Co3O4- or Fe/Ni-based catalysts. Both XPS and FT-IR experiments unmasked Co3O4 as the dominating compound on the surface of the X20CoCrWMo10-9//Co3O4 composite. By performing a comprehensive dual beam FIB-SEM (focused ion beam-scanning electron microscopy) study{,} we could show that the new composite does not exhibit a classical substrate-layer structure due to the intrinsic formation of the Co-enriched outer zone. This structural particularity is basically responsible for the outstanding electrocatalytic OER performance.}, author = {Schäfer, Helmut and Chevrier, Daniel M. and Kuepper, Karsten and Zhang, Peng and Wollschlaeger, Joachim and Daum, Diemo and Steinhart, Martin and Heß, Claudia and Krupp, Ulrich and Müller-Buschbaum, Klaus and Stangl, Johannes and Schmidt, Mercedes}, journal = {Energy Environ. Sci.}, keywords = {ak stangl}, number = 8, pages = {2609-2622}, publisher = {The Royal Society of Chemistry}, title = {X20CoCrWMo10-9//Co3O4: a metal-ceramic composite with unique efficiency values for water-splitting in the neutral regime}, volume = 9, year = 2016 }
Schäfer, H., Chevrier, D. M., Zhang, P., Stangl, J., Müller-Buschbaum, K., Hardege, J. D., Kuepper, K., Wollschläger, J., Krupp, U., Dühnen, S., Steinhart, M., Walder, L., Sadaf, S. & Schmidt, M.Electro-Oxidation of Ni42 Steel: A Highly Active Bifunctional Electrocatalyst.Advanced Functional Materials26,6402--6417(2016).
[ BibTeX ][ DOI ]

@article{ADFM:ADFM201601581, abstract = {Janus type water-splitting catalysts have attracted highest attention as a tool of choice for solar to fuel conversion. AISI Ni42 steel is upon harsh anodization converted into a bifunctional electrocatalyst. Oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) are highly efficiently and steadfast catalyzed at pH 7, 13, 14, 14.6 (OER) and at pH 0, 1, 13, 14, 14.6 (HER), respectively. The current density taken from long-term OER measurements in pH 7 buffer solution upon the electro-activated steel at 491 mV overpotential (η) is around four times higher (4 mA cm−2) in comparison with recently developed OER electrocatalysts. The very strong voltage–current behavior of the catalyst shown in OER polarization experiments at both pH 7 and at pH 13 are even superior to those known for IrO2-RuO2. No degradation of the catalyst is detected even when conditions close to standard industrial operations are applied to the catalyst. A stable Ni-, Fe-oxide based passivating layer sufficiently protects the bare metal for further oxidation. Quantitative charge to oxygen (OER) and charge to hydrogen (HER) conversion are confirmed. High-resolution XPS spectra show that most likely γ−NiO(OH) and FeO(OH) are the catalytic active OER and NiO is the catalytic active HER species.}, author = {Schäfer, Helmut and Chevrier, Daniel M. and Zhang, Peng and Stangl, Johannes and Müller-Buschbaum, Klaus and Hardege, Jörg D. and Kuepper, Karsten and Wollschläger, Joachim and Krupp, Ulrich and Dühnen, Simon and Steinhart, Martin and Walder, Lorenz and Sadaf, Shamaila and Schmidt, Mercedes}, journal = {Advanced Functional Materials}, keywords = {ak stangl}, number = 35, pages = {6402--6417}, title = {Electro-Oxidation of Ni42 Steel: A Highly Active Bifunctional Electrocatalyst}, volume = 26, year = 2016 }

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Johannes Stangl, M.Sc.

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