Heat-Treated Aerogel as a Catalyst for the Oxygen Reduction Reaction.
Angew Chem Int Ed Engl
; 59(6): 2483-2489, 2020 Feb 03.
Article
en En
| MEDLINE
| ID: mdl-31774933
ABSTRACT
Aerogels are fascinating materials that can be used for a wide range of applications, one of which is electrocatalysis of the important oxygen reduction reaction. In their inorganic form, aerogels can have ultrahigh catalytic site density, high surface area, and tunable physical properties and chemical structures-important features in heterogeneous catalysis. Herein, we report on the synthesis and electrocatalytic properties of an iron-porphyrin aerogel. 5,10,15,20-(Tetra-4-aminophenyl)porphyrin (H2 TAPP) and FeII were used as building blocks of the aerogel, which was later heat-treated at 600 °C to enhance electronic conductivity and catalytic activity, while preserving its macrostructure. The resulting material has a very high concentration of atomically dispersed catalytic sites (9.7×1020 â
sites g-1 ) capable of catalyzing the oxygen reduction reaction in alkaline solution (Eonset =0.92â
V vs. RHE, TOF=0.25â
e- site-1 s-1 at 0.80â
V vs. RHE).
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
Angew Chem Int Ed Engl
Año:
2020
Tipo del documento:
Article
País de afiliación:
Israel
Pais de publicación:
ALEMANHA
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ALEMANIA
/
DE
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DEUSTCHLAND
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GERMANY