Single Cobalt Atoms with Precise N‐Coordination as Superior Oxygen Reduction Reaction Catalysts
University of Science and Technology of China · Collaborative Innovation Center of Quantum Matter · +4 more institutions
Abstract
A new strategy for achieving stable Co single atoms (SAs) on nitrogen-doped porous carbon with high metal loading over 4 wt % is reported. The strategy is based on a pyrolysis process of predesigned bimetallic Zn/Co metal-organic frameworks, during which Co can be reduced by carbonization of the organic linker and Zn is selectively evaporated away at high temperatures above 800 °C. The spherical aberration correction electron microscopy and extended X-ray absorption fine structure measurements both confirm the atomic dispersion of Co atoms stabilized by as-generated N-doped porous carbon. Surprisingly, the obtained Co-Nx single sites exhibit superior ORR performance with a half-wave potential (0.881 V) that is…
Citation impact
- FWCI
- 71.11
- Percentile
- 100%
- References
- 43
Authors
13- PYPeiqun Yin
University of Science and Technology of China, Collaborative Innovation Center of Quantum Matter, Tsinghua University
- TYTao Yao
University of Science and Technology of China, Hefei National Center for Physical Sciences at Nanoscale
- YWYuen WuCorresponding
University of Science and Technology of China, Collaborative Innovation Center of Quantum Matter, Tsinghua University
- LZLirong Zheng
Institute of High Energy Physics
- YLYue Lin
University of Science and Technology of China, Hefei National Center for Physical Sciences at Nanoscale
Topics & keywords
- Catalysis
- Bimetallic strip
- Cobalt
- Carbonization
- Electrocatalyst
- Materials science
- Thermal stability
- Carbon fibers