High-content atomically distributed W(V,VI) on FeCo layered double hydroxide with high oxygen evolution reaction...

Area of Science:

• Materials Science
• Electrochemistry
• Catalysis

Background:

• Layered double hydroxides (LDHs) are promising electrode materials.
• Developing efficient and stable electrocatalysts for the oxygen evolution reaction (OER) is crucial for water splitting technologies.
• Atomically dispersed metal sites offer unique catalytic properties.

Purpose of the Study:

• To synthesize and characterize a novel single-atom catalyst (SAC) integrating tungsten with FeCo LDH.
• To investigate the electrocatalytic activity and stability of the synthesized material for the oxygen evolution reaction (OER).
• To explore the role of atomically distributed W(V,VI) coordinated with O atoms as WO2 moieties.

Main Methods:

• Facile coprecipitation method for synthesizing the SAC W-FeCo LDH.
• Characterization of the material's structure and composition.
• Electrochemical testing to evaluate OER performance and stability.

Main Results:

• Successfully synthesized atomically distributed W(V,VI) coordinated with O atoms as WO2 moieties anchored on FeCo LDH nanosheets.
• The resulting SAC W-FeCo LDH exhibited significantly enhanced and stable OER electrocatalytic activity.
• The anchoring of WO2 moieties on FeCo LDH contributes to improved catalytic performance.

Conclusions:

• The facile coprecipitation method is effective for creating advanced SACs.
• SAC W-FeCo LDH presents a highly promising electrocatalyst for efficient and stable OER.
• This work highlights the potential of single-atom doping in LDH structures for energy applications.