Understanding the active site in chameleon-like bifunctional catalyst for practical rechargeable zinc-air batteries.

ABSTRACT: The practical application of rechargeable zinc-air batteries faces challenges stemming from inadequate bifunctional catalysts, contradictory gas-liquid-solid three-phase interfaces, and an ambiguous fundamental understanding. Herein, we propose a chameleon-like bifunctional catalyst comprising ruthenium single-atoms grafted onto nickel-iron layer double hydroxide (Ru_SA-NiFe LDH). The adaptive oxidation of Ru_SA-NiFe LDH to oxyhydroxide species (Ru_SA-NiFeOOH) during charging exposes active sites for the oxygen evolution reaction, while reversible reduction to NiFe LDH during discharge exposes active sites for the oxygen reduction reaction. Additionally, a hierarchical air cathode featuring hydrophilic and hydrophobic layers facilitates the reversible conversi

SUBMITTER: Zhong X 

PROVIDER: S-EPMC11544253 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature