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FeCo alloy encapsulated in N-doped carbon shell for efficient oxygen reduction reaction by Biaolong Wang; Siqi Shen; Yifei Wang; Zhiguo Zhang; Yousheng Xu; Yange Suo is a Engineering article available to read on EtoBox.

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This work reports the synthesis of FeCo alloy encapsulated in N-doped carbon shell for efficient oxygen reduction reaction (ORR). The FeCoNC-0.3compound were synthesized by high temperature pyrolysis of ZIF-L with the assistance of different Fe salts (i.e., FeCl3·6H2O, FeSO4·7H2O, K3Fe(CN)6, Fe(NH4)2·(SO4)2·6H2O and (NH4)3·Fe(C2O4)3·3H2O). With the presence of FeCl3·6H2O, FeSO4·7H2O, Fe(NH4)2·(SO4)2·6H2O and (NH4)3·Fe(C2O4)3·3H2O during the pyrolysis process, FeCo alloys are formed and more nitrogen elements are remained after high temperature pyrolysis compared with that in CoNC derived from pure ZIF-L. Differently, the introduction of K3Fe(CN)6 cannot lead to the generation of FeCo alloy and less nitrogen elements are remained after high temperature pyrolysis in comparison with that in CoNC. Linear relationship between the ORR onset potential and the ID/IG value of the FeCoNC-0.3compound catalysts are observed. Besides, the onset potential also increases linearly with the increase of the total content of pyridinic-N + graphitic-N + Fe(Co)-Nx. These results suggest that high content of carbon defects and high content of pyridinic-N, graphitic-N and Fe(Co)-Nx are beneficial for the

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Author

Biaolong Wang; Siqi Shen; Yifei Wang; Zhiguo Zhang; Yousheng Xu; Yange Suo

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)