Synergistic Fe-Se Atom Pairs as Bifunctional Oxygen Electrocatalysts Boost Low-Temperature Rechargeable Zn-Air Battery.
Angew Chem Int Ed Engl
; 62(15): e202219191, 2023 Apr 03.
Article
en En
| MEDLINE
| ID: mdl-36808803
ABSTRACT
Herein, we successfully construct bifunctional electrocatalysts by synthesizing atomically dispersed Fe-Se atom pairs supported on N-doped carbon (Fe-Se/NC). The obtained Fe-Se/NC shows a noteworthy bifunctional oxygen catalytic performance with a low potential difference of 0.698â
V, far superior to that of reported Fe-based single-atom catalysts. The theoretical calculations reveal that p-d orbital hybridization around the Fe-Se atom pairs leads to remarkably asymmetrical polarized charge distributions. Fe-Se/NC based solid-state rechargeable Zn-air batteries (ZABs-Fe-Se/NC) present stable charge/discharge of 200â
h (1090â
cycles) at 20â
mA cm-2 at 25 °C, which is 6.9â
times of ZABs-Pt/C+Ir/C. At extremely low temperature of -40 °C, ZABs-Fe-Se/NC displays an ultra-robust cycling performance of 741â
h (4041â
cycles) at 1â
mA cm-2 , which is about 11.7â
times of ZABs-Pt/C+Ir/C. More importantly, ZABs-Fe-Se/NC could be operated for 133â
h (725â
cycles) even at 5â
mA cm-2 at -40 °C.
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Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
Angew Chem Int Ed Engl
Año:
2023
Tipo del documento:
Article
País de afiliación:
China