CRC 1073 Atomic scale control of energy conversion
Outline of CRC 1073 Project Groups
Highlight publications of the 2nd funding period
D. Mierwaldt, V. Roddatis, M. Risch, J. Scholz, J. Geppert, M. Ebrahimizadeh A., and Ch. Jooss (C02, Z02) Environmental TEM Investigation of Electrochemical Stability of Perovskite and Ruddlesden–Popper Type Manganite Oxygen Evolution Catalysts, Adv. Sustainable Syst. 2017, DOI: 10.1002/adsu.201700109
The study reports on environmental transmission electron microscopy (ETEM) of the highly correlated perovskite Pr1–xCaxMnO3 and the Ruddlesden–Popper Pr0.5Ca1.5MnO4 used as model electrodes to understand and control the elementary steps of energy conversion during electrochemical reactions in H2O vapor. The structural changes in these materials observed in the ETEM investigations depend on the amount of doping (x) and environmental conditions, and correlate with the catalytical activity revealed by ex situ experiments.
P91-PCMO single crystal observed at 〈110〉 zone axis after a) 4 min and b) 7 min of the ETEM experiment in 0.5 Pa H2O. FFT shown as inset.