Volume 64, Issue 3 e202415273
Research Article

Prompting CO2 Electroreduction to Ethanol by Iron Group Metal Ion Dopants Induced Multi-sites at the Interface of SnSe/SnSe2 p–n Heterojunction

Xinyue Zheng

Xinyue Zheng

Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Engineering Research Center of Carbon Neutrality, Anhui Key Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, 241002 P. R. China

These authors contributed equally to this work.

Contribution: Data curation (equal), Formal analysis (equal), ​Investigation (equal), Validation (equal), Writing - original draft (supporting)

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Yan Hu

Yan Hu

Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Engineering Research Center of Carbon Neutrality, Anhui Key Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, 241002 P. R. China

These authors contributed equally to this work.

Contribution: Data curation (equal), Formal analysis (equal), ​Investigation (equal), Validation (equal), Writing - original draft (supporting)

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Xiangyu Wang

Xiangyu Wang

Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Engineering Research Center of Carbon Neutrality, Anhui Key Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, 241002 P. R. China

These authors contributed equally to this work.

Contribution: Data curation (equal), Formal analysis (equal), ​Investigation (equal), Validation (equal), Writing - original draft (supporting)

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Jiahui Zhu

Jiahui Zhu

Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Engineering Research Center of Carbon Neutrality, Anhui Key Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, 241002 P. R. China

Contribution: ​Investigation (supporting), Validation (supporting)

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Xingyue Zhang

Xingyue Zhang

Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Engineering Research Center of Carbon Neutrality, Anhui Key Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, 241002 P. R. China

Contribution: ​Investigation (supporting), Validation (supporting)

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Prof. Tian Sheng

Corresponding Author

Prof. Tian Sheng

Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Engineering Research Center of Carbon Neutrality, Anhui Key Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, 241002 P. R. China

Contribution: Methodology (supporting), Resources (supporting), Writing - original draft (supporting), Writing - review & editing (supporting)

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Prof. Zhengcui Wu

Corresponding Author

Prof. Zhengcui Wu

Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Engineering Research Center of Carbon Neutrality, Anhui Key Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, 241002 P. R. China

Contribution: Methodology (lead), Resources (lead), Supervision (lead), Writing - original draft (lead), Writing - review & editing (lead)

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First published: 17 October 2024
Citations: 8

Graphical Abstract

Highly efficient CO2 electroreduction to ethanol is achieved via iron group metal ions doped amorphous/crystalline SnSe/SnSe2 nanorod/nanosheet hierarchical structure. Iron group metal ions doping stabilizes *CO*OH intermediate and strengthens *CO binding for further C−C coupling to eventual ethanol generation at the interface of M2+-doped SnSe/SnSe2.

Abstract

The development of non-copper-based materials for CO2 electroreduction to ethanol with high selectivity at large current density is highly desirable, but still a great challenge. Herein, we report iron group metal ions of M2+ (M=Fe, Co, or Ni)-doped amorphous/crystalline SnSe/SnSe2 nanorod/nanosheet hierarchical structures (a/c-SnSe/SnSe2) for selective CO2 electroreduction to ethanol. Iron group metal ions doping induces multiple active sites at the interface of M2+-doped SnSe/SnSe2 p-n heterojunction, which strengthens *CO intermediate binding for further C−C coupling to eventual ethanol generation. As a representative, Fe9.0%-a/c-SnSe/SnSe2 exhibits an ethanol Faradaic efficiency of 62.7 % and a partial current density of 239.0 mA cm−2 at −0.6 V in a flow cell. Moreover, it can output an ethanol Faradaic efficiency of 63.5 % and a partial current density of 201.2 mA cm−2 with a full-cell energy efficiency of 24.1 % at 3.0 V in a membrane electrode assembly (MEA) electrolyzer. This work provides insight into non-Cu based catalyst design for stabilizing the key intermediates for selective ethanol production from CO2 electroreduction.

Conflict of Interests

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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