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Updated: Jan 18, 2026

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
Published on: April 10, 2018
Dynamic Spin Governing Asymmetric Coordination Fields in Trimetallic Single-Atom Catalysts for Optimal Oxygen
Kexin Song1, Binbin Yang1, Wengang An2
1Key Laboratory of Automobile Materials Ministry of Education, School of Materials Science & Engineering, Electron Microscopy Center, Changbaishan Laboratory, International Center of Future Science, Jilin University, Changchun, 130012, P.R. China.
We developed a "Dynamic Spin Engineering" strategy for tri-metallic single-atom catalysts, enhancing oxygen reduction reaction (ORR) performance and stability. This approach optimizes proton-coupled electron transfer (PCET) by enabling dynamic reconstruction and spin-state transitions in catalysts.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Single-atom catalysts (SACs) offer theoretical advantages for oxygen reduction reaction (ORR) kinetics.
- Limited dynamic adaptability of SACs challenges multi-step proton-coupled electron transfer (PCET).
- Need for advanced catalyst designs that balance activity and stability.
Purpose of the Study:
- To introduce a "Dynamic Spin Engineering" strategy for designing novel tri-metallic single-atom catalysts (FeZnTM-TACs).
- To investigate the performance and stability of these catalysts in ORR.
- To elucidate the underlying mechanisms of dynamic reconstruction, charge compensation, and spin-state transitions.
Main Methods:
- Design and synthesis of tri-metallic single-atom catalysts (FeZnTM-TACs) with asymmetric coordination fields.
- Electrochemical characterization of ORR performance and stability.
- Operando X-ray absorption fine structure (XAFS) and spin-polarized density functional theory (DFT) calculations.
Main Results:
- Optimized FeZnMn-TACs achieved exceptional ORR performance (E1/2 = 0.93 V vs RHE) and ultra-long stability (ΔE1/2 = 24 mV after 90,000 cycles).
- Demonstrated a ternary synergy involving dynamic reconstruction, charge compensation, and spin-state transition.
- Revealed dynamic FeNxCy evolution triggering a spin-state transition from medium spin to low spin, optimizing *OOH formation and *OH desorption.
Conclusions:
- The "Dynamic Spin Engineering" strategy enables the rational design of self-adaptive electrocatalysts.
- Atomic-level understanding of spin redistribution driven by dynamic reconstruction is established.
- This work provides a new paradigm for developing electrocatalysts with unified high activity and operational stability.
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