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Updated: Jul 20, 2025

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
Published on: April 10, 2018
Cation-Radius-Controlled Sn-O Bond Length Boosting CO2 Electroreduction over Sn-Based Perovskite Oxides
Mingfa Chen1, Kuan Chang1, Yu Zhang2,3
1Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 214122, Wuxi, China.
Researchers optimized tin-based perovskite oxides for efficient carbon dioxide electroreduction (CO2 RR) to formic acid (HCOOH). Controlling tin-oxygen bond lengths via A-site cation radius tuning significantly enhanced CO2 RR activity and selectivity.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Tin-based perovskite oxides show promise for CO2 electroreduction (CO2 RR).
- Rational design strategies for optimizing their CO2 RR performance are underdeveloped.
Purpose of the Study:
- To develop a strategy for enhancing CO2 electroreduction to formic acid (HCOOH) using Sn-based perovskite oxides.
- To investigate the effect of A-site cation radius on Sn-O bond length and its impact on CO2 RR properties.
Main Methods:
- Synthesized Ba1-x Srx SnO3 perovskite oxides with varying A-site cation radii.
- Systematically controlled Sn-O bond lengths by adjusting the ratio of Ba and Sr.
- Evaluated CO2 RR performance, including activity and selectivity for HCOOH production.
Main Results:
- Decreasing average A-site cation radii shortened Sn-O bond lengths.
- CO2 RR activity and selectivity for HCOOH exhibited volcano-type trends with Sn-O bond length.
- Ba0.5 Sr0.5 SnO3 demonstrated optimal performance with high activity (753.6 mA·cm-2) and selectivity (90.9%).
Conclusions:
- A-site radius-controlled Sn-O bond length is an effective strategy for optimizing Sn-based perovskite oxides for CO2 RR.
- Optimized Sn-O bonds improve band center regulation, intermediate adsorption/activation, and reduce energy barriers for HCOOH formation.
- This provides a new avenue for designing advanced Sn-based perovskite oxides for efficient CO2 electroreduction.
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