@misc{UtgenanntHansenKlepeletal., author = {Utgenannt, Stephan and Hansen, Felix and Klepel, Olaf and Jarczewski, Sebastian and Wach, Anna and Kuśtrowski, Piotr}, title = {Control of porosity and composition of carbon based catalysts prepared by template assisted routes}, series = {Catalysis Today}, volume = {Vol. 249}, journal = {Catalysis Today}, issn = {0920-5861}, doi = {10.1016/j.cattod.2014.10.036}, pages = {38 -- 44}, language = {en} } @inproceedings{UtgenanntHansenKlepeletal., author = {Utgenannt, Stephan and Hansen, Felix and Klepel, Olaf and Jarczewski, Sebastian and Wach, Anna and Kustrowski, Piotr and Erler, Thomas and Bron, Michael}, title = {A modular concept for the preparation of carbon based catalysts}, series = {Carbon 2015 : innovation with carbon materials; the Annual World Conference on Carbon, Dresden, Germany, July 12 - 17, 2015}, booktitle = {Carbon 2015 : innovation with carbon materials; the Annual World Conference on Carbon, Dresden, Germany, July 12 - 17, 2015}, publisher = {Deutsche Keramische Gesellschaft e.V.}, address = {K{\"o}ln}, pages = {S. 294}, language = {en} } @inproceedings{UtgenanntVormelchertKlepeletal., author = {Utgenannt, Stephan and Vormelchert, Carolin and Klepel, Olaf and Jarczewski, Sebastian and Drozdek, Michal and Kustrowski, Piotr and Erler, Thomas and R{\"u}mmler, Stephan and Bron, Michael}, title = {Template assisted synthesis of porous carbon catalysts with systematically varied properties}, series = {The zeolites : materials with engineered properties : book of abstracts / 7th FEZA Conference, July 3-7, 2017, Sofia, Bulgaria}, booktitle = {The zeolites : materials with engineered properties : book of abstracts / 7th FEZA Conference, July 3-7, 2017, Sofia, Bulgaria}, address = {Sofia}, pages = {S. 199}, language = {en} } @misc{KlepelUtgenanntVormelchertetal., author = {Klepel, Olaf and Utgenannt, Stephan and Vormelchert, Carolin and K{\"o}nig, Mark and Meißner, Andr{\´e} and Hansen, Felix and B{\"o}lte, Jens-Henning Ingo Holger and Sieber, Tim and Heinemann, Robert and Bron, Michael and Rokicinska, Anna and Jarczewski, Sebastian and Kustrowski, Piotr}, title = {Redox catalysts based on amorphous porous carbons}, series = {Microporous Mesoporous Materials}, volume = {323}, journal = {Microporous Mesoporous Materials}, issn = {1387-1811}, doi = {10.1016/j.micromeso.2021.111257}, pages = {12}, language = {en} } @misc{BoelteUtgenanntSchmidtetal., author = {B{\"o}lte, Jens-Henning and Utgenannt, Stephan and Schmidt, Max and Klepel, Olaf and Bron, Michael and Rokicińska, Anna and Jarczewski, Sebastian and Kuśtrowski, Piotr}, title = {S-doped and N+S-co-doped carbon catalysts in redox reactions}, series = {Microporous and mesoporous materials}, volume = {407}, journal = {Microporous and mesoporous materials}, publisher = {Elsevier BV}, address = {Amsterdam}, issn = {1873-3093}, doi = {10.1016/j.micromeso.2026.114129}, pages = {1 -- 11}, abstract = {In this contribution, the effects of heteroatom doping of porous carbon materials with S and N on their ability to catalyze redox-reactions involving the activation of molecular oxygen were investigated. For this purpose, a library of in total 54 undoped, S-doped and N + S-co-doped porous carbons was obtained via a template-based synthesis procedure using mesoporous silica gel as the template. To understand the influence of S on the properties of the doped carbons three different S-containing precursors, namely dimethyl sulfoxide (DMSO), p-toluene sulfonic acid and thiophene, were used. In order to investigate possible synergistic effects of S- and N-co-doping, urea was employed as the sole N-containing precursor. The obtained carbon catalysts were characterized by selected methods such as N2-physisorption at 77 K, X-ray diffraction (XRD), Raman spectroscopy, elemental analysis and X-ray photoelectron spectroscopy (XPS). Each carbon catalyst was tested in the oxidation of sulfurous acid (OSA) to sulfuric acid, the electrochemical oxygen reduction (ORR) and the oxidative dehydrogenation (ODH) of ethylbenzene. Owing to the similar textural and structural properties achieved through template-based synthesis of the carbon catalyst library, the results of the catalytic redox-reactions could directly be related to the respective heteroatom dopant. The observed trends indicate that in these redox-reactions S-species behave somewhat similar to O-species bound on the carbon surface. Furthermore, it can be shown that N + S co-doping rather combines the positive and negative effects of the individual dopants on the activity, than creating a synergistic effect that surpasses the individual contribution.}, language = {en} }