Optimizing the Ratio of Metallic and Single-Atom Co in CoNC via Annealing Temperature Modulation for Enhanced Bifunctional Oxygen Evolution Reaction/Oxygen Reduction Reaction Activity
Hengxu Cheng, Haojie Sun, Meizhen Dai, Yucai Li, Jian Wang, Shiwei Song, Dong Zhang, Depeng Zhao, Liwen Tan, Jianjun Zhang · 2024
Read Optimizing the Ratio of Metallic and Single-Atom Co in CoNC via Annealing Temperature Modulation for Enhanced Bifunctional Oxygen Evolution Reaction/Oxygen Reduction Reaction Activity by Hengxu Cheng, Haojie Sun, Meizhen Dai, Yucai Li, Jian Wang, Shiwei Song, Dong Zhang, Depeng Zhao, Liwen Tan, Jianjun Zhang (2024) in the Tower of Babel, a free online library of public-domain works preserved in clean, searchable text. No sign-up. The full text is served as a plain-text file at a predictable URL, where text is present: https://antarctic-labs.com/tower-of-babel/pmc-11643407.txt.
Description
Fuel cells and metal-air batteries need one catalyst that can run oxygen chemistry both ways — taking oxygen in and releasing it — without precious metals. Hengxu Cheng and co-authors tuned such a catalyst in 2024: cobalt, present both as metal particles and as lone atoms, spread on nitrogen-doped carbon, with the mix set by the baking temperature.
Batches baked at 900, 950, and 1000 degrees differed clearly. The 950-degree version won, driving the reduction reaction at a half-wave potential of 0.85 volts and the evolution reaction at low overpotential. In a rechargeable zinc-air battery it beat a commercial platinum-and-ruthenium benchmark. The authors present temperature tuning of the particle-to-atom ratio as a simple, effective design lever for bifunctional catalysts.
Catalog record
| CREATOR | Hengxu Cheng, Haojie Sun, Meizhen Dai, Yucai Li, Jian Wang, Shiwei Song, Dong Zhang, Depeng Zhao, Liwen Tan, Jianjun Zhang |
|---|---|
| YEAR | 2024 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 31 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |