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Single‐Atom Anchored on Perovskite With Strong Metal‐Oxide Interaction for Efficient High Temperature CO <sub>2</sub> Electrolysis

Feng HuSchool of Environment and Energy South China University of Technology Guangzhou 510006 ChinaBeibei HeSchool of Materials Science and Engineering Hainan University Haikou 570228 ChinaKongfa ChenCollege of Materials Science and Engineering Fuzhou University Fuzhou Fujian 350108 ChinaWenjia MaFaculty of Materials Science and Chemistry China University of Geosciences Wuhan 430074 ChinaYonglong HuangFaculty of Materials Science and Chemistry China University of Geosciences Wuhan 430074 ChinaSunce ZhaoSchool of Environment and Energy South China University of Technology Guangzhou 510006 ChinaYu ChenSchool of Environment and Energy South China University of Technology Guangzhou 510006 ChinaLing ZhaoSchool of Marine Science and Engineering Hainan University Haikou 570228 China

2025en

ABI

Annotatsiya

Abstract Efficient electrochemical CO 2 reduction remains a grand challenge in advancing carbon‐neutral energy technologies. Here, an efficient solid‐state approach for the fabrication of a novel single‐atom Ir anchored Sr 2 Fe 1.5 Mo 0.5 O 6‐δ (SFM) perovskite electrocatalyst, designed for high temperature CO 2 electrolysis in solid oxide electrolysis cells (SOECs) is reported. The resulting four‐coordinated Ir‐O‐Fe/Mo configuration induces pronounced interfacial electronic reconstruction and strong metal‐oxide interaction, substantially lowering the energy barrier for CO 2 electrolysis, as indicated by extended X‐ray absorption fine structure (EXAFS) analysis and density functional theory (DFT) calculations. When employed as a cathode in SOECs, the 2Ir/SFM (2 wt.% Ir) electrocatalyst achieves a high current density of 1.63 A cm −2 at 1.5 V and 800 °C, along with excellent Faradaic efficiency and long‐term operational stability. These findings offer atomistic insights into the structure‐performance relationship of single‐atom/perovskite heterostructures, underscoring the commercial potential of SOECs for CO 2 electrolysis.

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DOI: 10.1002/adma.202512310

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