Zobrazeno 1 - 10 of 148 pro vyhledávání: '"Helmut Kuhlenbeck"'
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Akademický článek
Comparative study of Co3O4(111), CoFe2O4(111), and Fe3O4(111) thin film electrocatalysts for the oxygen evolution reaction
Autor: Earl Matthew Davis, Arno Bergmann, Chao Zhan, Helmut Kuhlenbeck, Beatriz Roldan Cuenya
Publikováno v: Nature Communications, Vol 14, Iss 1, Pp 1-10 (2023)
Abstract Water electrolysis to produce ‘green H2’ with renewable energy is a promising option for the upcoming green economy. However, the slow and complex oxygen evolution reaction at the anode limits the efficiency. Co3O4 with added iron is a c
Externí odkaz: https://doaj.org/article/309b70a722fd4c469aea9bd062227534
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Surface oxygen Vacancies on Reduced Co3O4(100): Superoxide Formation and Ultra‐Low‐Temperature CO Oxidation
Autor: Wieland Schöllkopf, Yun Liu, Matthias Naschitzki, Beatriz Roldan Cuenya, Yuman Peng, Helmut Kuhlenbeck, Sandy Gewinner, Rossitza Pentcheva
Publikováno v: Angewandte Chemie (International Ed. in English)
Angewandte Chemie International Edition
Angewandte Chemie
The activation of molecular oxygen is a fundamental step in almost all catalytic oxidation reactions. We have studied this topic and the role of surface vacancies for Co3O4(100) films with a synergistic combination of experimental and theoretical met
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::96f1b08050de7aad84ecc1f4c139826a
http://europepmc.org/articles/PMC8361976
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5
Chapter model systems in heterogeneous catalysis at the atomic level: a personal view
Autor: Markus Heyde, Hans-Joachim Freund, Helmut Kuhlenbeck, Thomas Risse, Thomas Schmidt, Niklas Nilius, Shamil K. Shaikhutdinov, Martin Sterrer
Publikováno v: Science China Chemistry
The review presents an overview of studies in the surface science of oxide and related surfaces with an emphasis of the studies performed in the authors’ group. Novel instruments and technique developments, as well as their applications are reporte
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::00787ef836eddb3ade9c27d50d861cc6
https://doi.org/10.1007/s11426-019-9671-0
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6
Surface Action Spectroscopy: A Review and a Perspective on a New Technique to Study Vibrations at Surfaces
Autor: Zongfang Wu, Yun Liu, Hans-Joachim Freund, Helmut Kuhlenbeck
Publikováno v: The Chemical Record
A new vibrational spectroscopy method aimed at the investigation of solid surfaces in ultrahigh vacuum, called “Surface Action Spectroscopy (SAS)”, is described and the first results are reviewed. This technique is based on ideas and experiments
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4525a1786d42e3d6c00014a75e130639
https://hdl.handle.net/21.11116/0000-0008-E9DB-B21.11116/0000-0007-5DF1-1
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Oxidation of Reduced Ceria by Incorporation of Hydrogen
Autor: Agata Plucienik, Weixin Huang, Hans-Joachim Freund, Haibin Pan, Ai-Ping Jia, Kristin Werner, Rui You, Helmut Kuhlenbeck, Lihui Wu, Kun Qian, Liyuan Zhang, Zhaorui Li, Shamil K. Shaikhutdinov
Publikováno v: Angewandte Chemie (International Ed. in English)
Angewandte Chemie International Edition
Angewandte Chemie
The interaction of hydrogen with reduced ceria (CeO2−x) powders and CeO2−x(111) thin films was studied using several characterization techniques including TEM, XRD, LEED, XPS, RPES, EELS, ESR, and TDS. The results clearly indicate that both in re
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3496f15e9be56b4ad36f4ad00644c2c8
https://doi.org/10.1002/anie.201907117
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Characterization of Phonon Vibrations of Silica Bilayer Films
Autor: Felix E. Feiten, Radosław Włodarczyk, Helmut Kuhlenbeck, Nina F. Richter, Agata Plucienik, Emre Emmez, Itziar Goikoetxea, Jagriti Pal, Shamil K. Shaikhutdinov, Joachim Sauer, Hans-Joachim Freund, Thomas Risse
Publikováno v: The Journal of Physical Chemistry C
The vibrational properties of well-defined, two-dimensional silica films grown on Ru(0001) are characterized by high-resolution electron energy loss spectroscopy (HREELS). It is an interesting model system because it can adopt both crystalline and vi
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5ccf9dbae3230a91050a0ec714e8e210
https://doi.org/10.1021/acs.jpcc.8b10478
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Growth of well-ordered iron sulfide thin films
Autor: Helmut Kuhlenbeck, Earl M. Davis, Andreas Stierle, Hans-Joachim Freund, Giulia Berti, Vedran Vonk
Publikováno v: Physical chemistry, chemical physics 21(36), 20204-20210 (2019). doi:10.1039/C9CP04157E
Physical Chemistry Chemical Physics
Physical chemistry, chemical physics 21(36), 20204 - 20210 (2019). doi:10.1039/C9CP04157E
In this paper a growth recipe for well-ordered iron sulfide films and the results of their characterisationare presented. The film was studied using X-ray
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6930afe7c03c29feb29ec3748edb5771
https://doi.org/10.1039/c9cp04157e
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10
Surface core level BE shifts for CaO(100): insights into physical origins
Autor: Helmut Kuhlenbeck, Xunhua Zhao, Earl M. Davis, Hans-Joachim Freund, Paul S. Bagus, Sergey V. Levchenko, Connie J. Nelin
Publikováno v: Physical Chemistry Chemical Physics
The relationship between the electronic structure of CaO and the binding energy, BE, shifts between surface and bulk atoms is examined and the physical origins of these shifts are established. Furthermore, the contribution of covalent mixing to the i
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b70e56f00898a74d8afab01c22b35065
https://doi.org/10.1039/c9cp04847b
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