Trifunctional electrocatalyst with accurate surface reconstruction for zinc-air batteries and water electrolyzers.
basic_science · Level V
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- Record sourced from PubMed, PMID 42336873.
- Also identified by DOI 10.1038/s41467-026-74714-5.
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Abstract
Exploiting cost-effective trifunctional electrocatalysts toward oxygen evolution reaction, hydrogen evolution reaction and oxygen reduction reaction is important for sustainable energy conversion and storage devices yet challenging. Here, we report a single-phase trifunctional electrocatalyst Sr<sub>2</sub>CoRuO<sub>6-δ</sub> with well-defined super-exchange double perovskite structure, which can efficiently catalyze oxygen evolution, hydrogen evolution and oxygen reduction under alkaline conditions. As an air electrode, Sr<sub>2</sub>CoRuO<sub>6-δ</sub> delivers high peak power density of 216 mW cm<sup>-2</sup>, high specific capacity of 748 mAh g<sup>-1</sup> and long lifespan up to 1000 h for liquid rechargeable zinc-air batteries, as well as broad temperature and deformation adaptability for solid-state flexible zinc-air batteries. Furthermore, an anion exchange membrane water electrolyzer employing Sr<sub>2</sub>CoRuO<sub>6-δ</sub> as both cathode and anode requires a cell voltage of 1.90 V at the current density of 1 A cm<sup>-2</sup> and shows a stable and rapid response when coupled with fluctuating solar electricity. Combining complementary in-situ and microscopic techniques, spatiotemporal surface reconstruction behavior of Sr<sub>2</sub>CoRuO<sub>6-δ</sub> under varied reactions is comprehensively investigated and true active components are identified.