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This research aims to improve the selectivity and efficiency of electrochemical CO2 reduction to formate.

Modulating *OCHO Adsorption Configuration on a Reconstructed Ag 3 Sn Quantum Dots/S–Sn Heterostructure for Selective CO 2 ‐to‐Formate Conversion

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Randomized trial demonstrates enhanced CO2 reduction to formate in a novel catalyst, suggesting effective design strategies.

This research aims to improve the selectivity and efficiency of electrochemical CO2 reduction to formate.
Constructed a Ag3Sn AQD/S─Sn heterojunction catalyst using galvanic replacement and in situ reconstruction.
Utilized combined ex situ/in situ characterizations and theoretical calculations to analyze adsorption configurations.
Achieved performance assessment in a flow cell over an extended operation period.
The Ag3Sn AQD/S─Sn catalyst achieved a Faradaic efficiency of 91.8% for formate, compared to 59.1% for the S─Sn catalyst.
In a flow cell, it generated a formate partial current density of –226.3 mA cm−2 and a production rate of 4225.2 µmol cm−2 h−1.
Maintained stable operation for over 60 hours at –200 mA cm−2.

Zhao et al. (2026) studied this question.

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