Experimental Observation of Redox-Induced Fe–N Switching Behavior as a Determinant Role for Oxygen Reduction Activity
Northeastern University · Los Alamos National Laboratory
Abstract
The commercialization of electrochemical energy conversion and storage devices relies largely upon the development of highly active catalysts based on abundant and inexpensive materials. Despite recent achievements in this respect, further progress is hindered by the poor understanding of the nature of active sites and reaction mechanisms. Herein, by characterizing representative iron-based catalysts under reactive conditions, we identify three Fe-N4-like catalytic centers with distinctly different Fe-N switching behaviors (Fe moving toward or away from the N4-plane) during the oxygen reduction reaction (ORR), and show that their ORR activities are essentially governed by the dynamic structure associated with…
Citation impact
- FWCI
- 14.03
- Percentile
- 100%
- References
- 53
Authors
11- QJQingying JiaCorresponding
Northeastern University, Los Alamos National Laboratory
- NRNagappan Ramaswamy
Los Alamos National Laboratory, Northeastern University
- HHHasnain Hafiz
Los Alamos National Laboratory, Northeastern University
- UTUrszula Tylus
Northeastern University, Los Alamos National Laboratory
- KSKara Strickland
Northeastern University, Los Alamos National Laboratory
Topics & keywords
- Redox
- Catalysis
- Oxygen reduction reaction
- Oxygen
- Transition metal
- Materials science
- Electron transfer
- Oxygen reduction
- Affordable and clean energy