Fe3o4 / fe 1-x S composite electrocatalytic material, preparation method and application thereof in electrocatalytic co2 reduction

The Fe3O4/Fe1-xS composite electrocatalytic material was prepared by the in-situ sulfidation method of Fe2O3, which solved the problem of C2H6 generation in the Fe-based electrocatalyst CO2ER system and achieved efficient electrocatalytic CO2 reduction to C2H6, with excellent electrocatalytic performance and C2H6 selectivity.

CN119956408BActive Publication Date: 2025-10-17WUHAN UNIV
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Patent Information

Application Number
CN202510117611.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-01-24
Publication Date
2025-10-17
Estimated Expiration
2045-01-24

AI Technical Summary

Technical Problem

The existing Fe-based electrocatalyst CO2ER system mainly produces C1 products. Reports of C2 products such as C2H6 are extremely rare, and the formation mechanism is unclear, resulting in a relatively single type of C2H6 electrocatalyst.

Method used

The Fe3O4/Fe1-xS composite electrocatalytic material was prepared by the in-situ Fe2O3 sulfurization method with thioacetamide as the sulfur source. The synergistic effect of the Fe3O4/Fe1-xS component interface and electroactive defects was utilized to promote charge transfer, CO2 adsorption and activation, and CC coupling reaction.

Benefits of technology

Highly efficient electrocatalytic reduction of CO2 to produce C2H6 was achieved. The Faradaic efficiency and current density of the Fe3O4/Fe1-xS composite material reached 67.5% and 35 mA cm-2, respectively, at a potential of -1.60 V, which is significantly better than that of pure Fe3O4 and Fe1-xS, and has good application prospects.

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Abstract

The application discloses a kind of ferroferric oxide / ferrous sulfide (Fe3O4 / Fe 1‑x S) composite electrocatalytic material, preparation method and its application in electrocatalytic carbon dioxide electro-reduction (CO2ER).The application uses ferroferric oxide (Fe2O3) in-situ sulfuration method to prepare Fe3O4 / Fe 1‑x S composite electrocatalytic material, which is spherical nanoparticle agglomerate, there are Fe3O4 / Fe 1‑x S interface and electrically active Fe 3+ Substitute Fe 2+ Defect (Fe Fe · ) Fe 1‑x S, both synergies effectively promote charge transfer, CO2 adsorption and activation and carbon-carbon (C-C) coupling reaction and ethane (C2H6) formation.The Fe3O4 / Fe 1‑x S composite material has good application prospect as CO2ER system C2H6 production electrocatalyst.
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