B1: Plasma induced nano-structuring for catalyst activation under operando conditions

Principal Investigators: B. Roldan

Team

Roldan, Beatriz (Principal Investigator)

Grosse, Philipp (PostDoc)

Öner, Sebastian (PostDoc)

Nguyen, Khanh-Ly (PhD)

Description

In this project, atmospheric plasmas will be used for the synthesis and modification of active thin films and nanoparticle catalysts. The plasma might promote controlled oxidation and stabilize active oxygen species. Furthermore, the surface roughness and the number of catalytically active defect sites might be enhanced. The performance of such plasma-synthesized and functionalized catalysts will be evaluated for energy-related electrochemical reactions. Finally, plasmas will be used under electrochemical operando reaction conditions to increase the catalyst activity via controlled generation of defects, the stabilization of a given oxidation state, via a maintained surface roughness or the generation of very high electric fields.

Publications

• Identifying structure-selectivity correlations in the electrochemical reduction of CO₂: a comparison of well-ordered atomically-clean and chemically-etched Cu single crystal surfaces
  F. Scholten, K.-L. C. Nguyen, J. P. Bruce, M. Heyde, B. Roldán Cuenya
  Angew. Chem. Int. Ed. 60, 19169 (2021)
• Linking the Evolution of Catalytic Properties and Structural Changes in Copper-Zinc Nanocatalysts using Operando EXAFS and Neural-Networks
  J. Timoshenko, H. S. Jeon, I. Sinev, F. Haase, A. Herzog, B. Roldán Cuenya
  Chem. Sci. 11, 3727 – 3736 (2020)
• Transition metal-based catalysts for the electrochemical CO2 reduction: from atoms and molecules to nanostructured materials
  F. Franco, C. Rettenmaier, H. S. Jeon, B. Roldán Cuenya
  Chem. Soc. Rev. 49, 6884 – 6946 (2020)
• Growth Dynamics and Processes Governing the Stability of Electrodeposited Size-controlled cubic Cu catalysts
  P. Grosse, A. Yoon, C. Rettenmaier, S.W. Chee, B. Roldán Cuenya
  J. Phys. Chem. C124, 49, 26908–26915 (2020)
• Operando NRIXS and XAFS Investigation of Segregation Phenomena in Fe-Cu and Fe-Ag nanoparticle catalysts during CO₂ electroreduction
  S. Kunze, P. Grosse, M. B. Lopez, I. Sinev, Zegkinoglou, H. Mistry, J. Timoshenko, Y. Hu, Zhao, E. Alp, S. W. Chee , B. Roldán Cuenya
  Angew. Chem. Int. Ed. 59, 22667 (2020)
• On the activity/selectivity and phase-stability of thermally-grown copper oxides during the electrocatalytic reduction of CO₂
  J.-J. Velasco-Vélez, C.-H. Chuang, D. Gao, Q. Zhu, D. Ivanov, H.-S. Jeon, R. Arrigo, R. Mom, E. Stotz, H.-L. Wu, T. Jones, B. Roldán Cuenya Cuenya, A. Knop-Gericke, R. Schlögl
  ACS Catalysis 10, 11510 - 11518 (2020)
• Rational catalyst and electrolyte design for CO₂ electro reduction towards multicarbon products
  D. Gao, R. M. Arán-Ais, H. S. Jeon, B. Roldán Cuenya
  Nature Catalysis 2, 198–210 (2019)
• Plasma-modified dendritic Cu catalyst for CO₂ electroreduction
  F. Scholten, I. Sinev, M. Bernal, B. Roldán Cuenya
  ACS Catalysis 2019, 9, 5496-5502
• Operando Insights into Nanoparticle Transformations during Catalysis
  A. Bergmann, B. Roldán Cuenya
  ACS Catalysis 9, 10020 – 10043 (2019)