Electrochemical dechlorination of
1,2-dichloroethane
(DCE) is one of the prospective and economic strategies for the preparation
of high-value ethylene. However, the exploration of advanced electrocatalysts
with high reactivity and selectivity and the identification of their
active sites are still a challenge. Herein, a single-atom (SA) Fe–N
x
–C nanosheet with the presence of
a highly efficient Fe–N4 coordination pattern is
reported. The as-prepared single-atom electrocatalyst exhibits a higher
reactivity and ethylene selectivity for DCE dechlorination reaction
than those of the commercially adopted 20% Pt–C catalyst. By
a combination of experiments and theoretical calculations, the atomically
dispersed Fe center in the Fe–N4 structure was unveiled
to be the dominating active site for electrochemical production of
ethylene. Our work would offer an approach for the rational development
of SA materials and supply crucial insight into the mechanism of ethylene
production through the DCE dechlorination reaction.
Hierarchical nitrogen-doped porous carbons (HNPCs) with tunable pore structures and ultrahigh specific surface areas were designed and prepared from sustainable biomass precursor cellulose carbamate via simultaneous carbonization and activation by a facile one-pot approach.
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