Fe/N Codoped Carbon Nanocages with Single-Atom Feature as Efficient Oxygen Reduction Reaction Electrocatalyst
| Autor: | Pei Chen, Yu Chen, Fengqi Zhao, Xinbing Chen, Jiaxin Song, Zhongwei An, Hongxu Gao, Nan Jia, Qiaozhen Xu |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Energy conversion efficiency Doping Electrochemical kinetics Limiting current Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrocatalyst 01 natural sciences 0104 chemical sciences Nanocages chemistry Chemical engineering Electrode Materials Chemistry Electrochemistry Chemical Engineering (miscellaneous) Electrical and Electronic Engineering 0210 nano-technology Carbon |
| Zdroj: | ACS Applied Energy Materials. 1:4982-4990 |
| ISSN: | 2574-0962 |
| Popis: | The electrochemical kinetics of oxygen reduction reaction (ORR) determines the energy conversion efficiency of fuel cells and metal–air batteries. Thus, developing efficient and low-cost electrocatalysts for the ORR has attracted mounting attention. Herein, a facile synthetic route is presented to achieve atomic dispersion of Fe–Nx species in N doped porous carbon nanocages, resulting in a single-atom ORR electrocatalyst. The obtained Fe/N codoped carbon nanocages exhibit a comparable half-wave potential (0.82 V) and higher limiting current density compared to the commercial Pt/C electrocatalyst. In addition, by using it as air electrode electrocatalyst, the assembled Zn–air battery device shows a specific capacity of 705 mAh g–1 at 5 mA cm–2 and a negligible voltage loss after continuous operation for 67 h. The superior performance of Fe/N codoped carbon nanocages is attributed to the porous structure and the synergetic effect of atomically dispersed Fe–Nx species and N doping. |
| Databáze: | OpenAIRE |
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