Liquid Phase Electron Microscopy

Liquid Phase Electron Microscopy

Our research aims to derive critical structure-property relationships that control the performance of nanoscale electrocatalysts through in situ characterization with electron microscopy and its associated spectroscopic techniques. In particular, we are interested in operando studies where the imaging of catalysts in liquid environments is coupled with concurrent measurements of their reaction kinetics.

This approach will allow us to directly interrogate the structure and composition of these catalysts under reaction conditions and generate insights that can be used to inform the rational design of these nanomaterials. Other areas of interest of the group include: (1) automated image processing of high frame count electron microscope image sequences, (2) advanced image analysis of low quality images acquired at low electron fluences, and (3) the development of multi-modal approaches towards catalyst characterization using methods complementary to electron microscopy.

 

Group Members

Dr. Aram Yoon Fengli Yang

Dr. Stefanie Kühl

kuehl@fhi-berlin.mpg.de

 

FHI Electron Microscopy Facility

Wiebke Frandsen

 

Recent Publications

A. Yoon, A. Herzog, P. Grosse, D.H. Alsem, S.W. Chee and B. Roldan Cuenya: Dynamic Imaging of Nanostructures in an Electrolyte with a Scanning Electron Microscope. Microscopy and Microanalysis, in press.
S.W. Chee, T. Lunkenbein, R. Schlögl and B. Roldan Cuenya: In situ and Operando Electron Microscopy in Heterogeneous Catalysis – Insights into Multi-Scale Chemical Dynamics. Journal of Physics: Condensed Matter, in press.
P. Grosse, A. Yoon, C. Rettenmaier, S.W. Chee and B. Roldan Cuenya: Growth Dynamics and Processes Governing the Stability of Electrodeposited Size-Controlled Cubic Cu Catalysts. Journal of Physical Chemistry C 124 (49), 26908–26915 (2020).
S. Kunze, P. Grosse, M.B. Lopez, I. Sinev, I. Zegkinoglou, H. Mistry, J. Timoshenko, M.Y. Hu, J. Zhao, E.E. Alp, S.W. Chee and B. Roldan Cuenya: Operando NRIXS and XAFS Investigation of Segregation Phenomena in Fe‐Cu and Fe‐Ag Nanoparticle Catalysts during CO2 Electroreduction. Angewandte Chemie International Edition 59 (50), 22667–22674 (2020).
C. Rettenmaier, R.M. Arán-Ais, J. Timoshenko, R. Rizo, H. Jeon, S. Kühl, S.W. Chee, A. Bergmann and B. Roldan Cuenya: Enhanced Formic Acid Oxidation over SnO2-decorated Pd Nanocubes. ACS Catalysis 10, 14540–14551 (2020).
R. Aran Ais, R. Rizo, P. Grosse, G. Algara-Siller, K. Dembélé, M. Plodinec, T. Lunkenbein, S.W. Chee and B. Roldan Cuenya: Imaging electrochemically synthesized Cu2O cubes and their morphological evolution under conditions relevant to CO2 electroreduction. Nature Communications 11, 3489 (2020).
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