Zobrazeno 1 - 10
of 505
pro vyhledávání: '"Jan‐Dierk Grunwaldt"'
Autor:
Sebastian Paripsa, Abhijeet Gaur, Frank Förste, Dmitry E. Doronkin, Wolfgang Malzer, Christopher Schlesiger, Birgit Kanngießer, Edmund Welter, Jan-Dierk Grunwaldt, Dirk Lützenkirchen-Hecht
Publikováno v:
Journal of Synchrotron Radiation, Vol 31, Iss 5, Pp 1105-1117 (2024)
Under DAPHNE4NFDI, the X-ray absorption spectroscopy (XAS) reference database, RefXAS, has been set up. For this purpose, we developed a method to enable users to submit a raw dataset, with its associated metadata, via a dedicated website for inclusi
Externí odkaz:
https://doaj.org/article/53e0e056c639481d85e777d077c3d293
Autor:
Hugo Alexander Suarez Orduz, Luca Bugarin, Sarina-Lena Heck, Paolo Dolcet, Maria Casapu, Jan-Dierk Grunwaldt, Pieter Glatzel
Publikováno v:
Journal of Synchrotron Radiation, Vol 31, Iss 4, Pp 733-740 (2024)
L3-edge high-energy-resolution fluorescence-detection X-ray absorption near-edge structure (XANES) spectra for palladium and rhodium compounds are presented, with focus on their electronic structures. The data are compared with transmission XANES spe
Externí odkaz:
https://doaj.org/article/3b3cb81cbfba47ef99952be1f230f38c
Autor:
Alexander Rex, Leonardo Almeida De Campos, Torben Gottschalk, Dario Ferreira Sanchez, Patrick Trinke, Steffen Czioska, Erisa Saraçi, Boris Bensmann, Jan‐Dierk Grunwaldt, Richard Hanke‐Rauschenbach, Thomas L. Sheppard
Publikováno v:
Advanced Energy & Sustainability Research, Vol 5, Iss 9, Pp n/a-n/a (2024)
The stability of catalyst layers and membranes in proton exchange membrane water electrolysis (PEMWE) cells represents an ongoing challenge, compounded by the dissolution of components and migration of elements within the catalyst‐coated membrane (
Externí odkaz:
https://doaj.org/article/67aedcaaa64e4b65ba788b6d483e90e5
Autor:
Shilong Chen, Jelena Jelic, Denise Rein, Sharif Najafishirtari, Franz-Philipp Schmidt, Frank Girgsdies, Liqun Kang, Aleksandra Wandzilak, Anna Rabe, Dmitry E. Doronkin, Jihao Wang, Klaus Friedel Ortega, Serena DeBeer, Jan-Dierk Grunwaldt, Robert Schlögl, Thomas Lunkenbein, Felix Studt, Malte Behrens
Publikováno v:
Nature Communications, Vol 15, Iss 1, Pp 1-11 (2024)
Abstract Ammonia is a storage molecule for hydrogen, which can be released by catalytic decomposition. Inexpensive iron catalysts suffer from a low activity due to a too strong iron-nitrogen binding energy compared to more active metals such as ruthe
Externí odkaz:
https://doaj.org/article/10449b533a3d4884bbfd4659b897e294
Publikováno v:
CHIMIA, Vol 78, Iss 5 (2024)
Solid materials like heterogeneous catalysts are highly dynamic and continuously tend to change when exposed to the reaction environment. To understand the catalyst system under true reaction conditions,operando spectroscopy is the key to unravel sma
Externí odkaz:
https://doaj.org/article/3d7b4db6951148f9b2b52e7825044707
Autor:
Xin Huang, Daniel Eggart, Gangqiang Qin, Bidyut Bikash Sarma, Abhijeet Gaur, Jiuzhong Yang, Yang Pan, Mingrun Li, Jianqi Hao, Hongfei Yu, Anna Zimina, Xiaoguang Guo, Jianping Xiao, Jan-Dierk Grunwaldt, Xiulian Pan, Xinhe Bao
Publikováno v:
Nature Communications, Vol 14, Iss 1, Pp 1-9 (2023)
Abstract Molybdenum supported on zeolites has been extensively studied as a catalyst for methane dehydroaromatization. Despite significant progress, the actual intermediates and particularly the first C-C bond formation have not yet been elucidated.
Externí odkaz:
https://doaj.org/article/6baaf808b388401d8804ef4695dc8c56
Autor:
Oliver R. Schade, Patrick-Kurt Dannecker, Kai F. Kalz, David Steinbach, Michael A. R. Meier, Jan-Dierk Grunwaldt
Publikováno v:
ACS Omega, Vol 4, Iss 16, Pp 16972-16979 (2019)
Externí odkaz:
https://doaj.org/article/bd88e1584673418db1a0b2969d718c63
Autor:
Lucas Warmuth, Gülperi Nails, Maria Casapu, Sheng Wang, Silke Behrens, Jan-Dierk Grunwaldt, Claus Feldmann
Publikováno v:
Catalysts, Vol 11, Iss 8, p 949 (2021)
Titania nanotubes (TNTs) impregnated with Pd and Pt nanoparticles are evaluated as heterogeneous catalysts in different conditions in two reactions: catalytic CO oxidation (gas phase, up to 500 °C) and H2O2 direct synthesis (liquid phase, 30 °C). T
Externí odkaz:
https://doaj.org/article/74ef32f386894f079aeaddda2fd73836
Publikováno v:
Catalysts, Vol 11, Iss 5, p 617 (2021)
Despite their high atomic dispersion, single site catalysts with Pt supported on CeO2 were found to have a low activity during oxidation reactions. In this study, we report the behavior of Pt/CeO2 single site catalyst under more complex gas mixtures,
Externí odkaz:
https://doaj.org/article/36ecd54651824817812fb77dc46ec120
Autor:
Johannes Becher, Sebastian Weber, Dario Ferreira Sanchez, Dmitry E. Doronkin, Jan Garrevoet, Gerald Falkenberg, Debora Motta Meira, Sakura Pascarelli, Jan-Dierk Grunwaldt, Thomas L. Sheppard
Publikováno v:
Catalysts, Vol 11, Iss 4, p 459 (2021)
Structure–activity relations in heterogeneous catalysis can be revealed through in situ and operando measurements of catalysts in their active state. While hard X-ray tomography is an ideal method for non-invasive, multimodal 3D structural characte
Externí odkaz:
https://doaj.org/article/20907f58c5ec499d9d33ad66d3c14335