Julius Knöppel
Alumni
j.knoeppel@fz-juelich.de
tel: +49 9131 85-20257
Time(Joined/Stayed):
Current position/Place:
Back to team
(Photo-)electrochemical water splitting is a key process in storage and utilization of renewable energies in the upcoming energy scenario. While the technology readiness level of polymer electrolyte membrane water electrolysis (PEMWE) is high at it’s current stage photoelectrochemical water splitting has still a long way to go. Both technologies suffer hereby from the slow kinetics and and harsh oxidative conditions at the anode which lead to materials degradation.
My work revolves around the degradation mechanisms of (photo-)electrochemical anode materials. Using an electrochemical scanning flow cell (SFC) coupled to an inductively coupled plasma mass spectrometer (ICP-MS) I am able to detect dissolution products and connect degradation to electrochemical operation modes. Furthermore my work involves uncovering the differences of degradation in fundamental studies compared to degradation in operational systems.
-
10. Dissolution of WO3 modified with IrOx overlayers during photoelectrochemical water splitting
K.J. Jenewein,* J. Knöppel, A. Hofer, A. Kormányos, B. Mayerhöfer, F.D. Speck, M. Bierling, S. Thiele, J. Bachmann, S. Cherevko*
SusMat
3(1)
(2023)
128-136
-
H. Wilson, A. Van Rooij, K.J. Jenewein, J. Knöppel, A. Kormanyos, S. Cherevko, S. Sunde, A. Erbe*
Physica Status Solidi A: Applications and Materials Science
219(11)
(2022)
2100852
-
8. CrOx-Mediated Performance Enhancement of Ni/NiO-Mg:SrTiO3 in Photocatalytic Water Splitting
K. Han, D.M. Haiber, J. Knöppel, C. Lievens, S. Cherevko, P. Crozier, G. Mull, B. Mei
ACS Catalysis
11(17)
(2021)
11049–11058
-
K.J. Jenewein*, A. Kormányos, J. Knöppel, K.J.J. Mayrhofer, S. Cherevko*
ACS Measurement Science Au
1(2)
(2021)
74–81
-
6. Photocorrosion of WO3 photoanodes in different electrolytes
J. Knöppel,* A. Kormányos, B. Mayerhöfer, A. Hofer, M. Bierling, J. Bachmann, S. Thiele, S. Cherevko*
ACS Physical Chemistry Au
1(1)
(2021)
6–13
-
J. Knöppel, M. Möckl, D. Escalera-López, K. Stojanovski, M. Bierling, T. Böhm, S. Thiele, M. Rzepka, S. Cherevko
Nature Communications
12
(2021)
2231
-
4. Platinum dissolution in realistic fuel cell catalyst layers
K. Ehelebe∗, J. Knöppel, M. Bierling, B. Mayerhöfer, T. Böhm, N. Kulyk, S. Thiele, K.J.J. Mayrhofer, S. Cherevko∗
Angewandte Chemie International Edition
60(16)
(2021)
8882-8888
-
M. Bertram, C. Prössl, M. Ronovský, J. Knöppel , P. Matvija, L. Fusek, T. Skála, N. Tsud, M. Kastenmeier, K.C. Prince, V. Matolín, K. Mayrhofer, V. Johánek, J. Mysliveček, S. Cherevko, Y. Lykhach, O. Brummel*, J. Libuda
The Journal of Physical Chemistry Letters
11
(2020)
8365-8371
-
C.V. Pham,* M. Bühler, J. Knöppel, M. Bierling, D. Seeberger, D. Escalera-López, K.J.J. Mayrhofer, S. Cherevko, S. Thiele*
Applied Catalysis B: Environmental
269
(2020)
118762
-
J. Knöppel,* S. Zhang, F.D. Speck, K.J.J. Mayrhofer, C. Scheu, S. Cherevko*
Electrochemistry Communications
96
(2018)
53-56
2023
2022
2021
2020
2018
| 2016-2017 | Masters thesis at Helmholtz-Zentrum Dresden-Rossendorf (Spektroskopische und kalorimetrische Untersuchungen zur Metallbindung und Strukturänderung der MIIA-Domäne des Proteins VIC_001052) |
| 2013-2017 | M Sc. Physics at TU Dresden |
| 2013 | Bachelors thesis at Helmholtz Institut für Strahlen und Kernphysik Bonn (FEM-Simulationen zur Analyse von Verschiebungen in der MR-Rheologie) |
| 2009–2013 | B Sc. physics at Universität Bonn |