Abstract
The oxygen evolution reaction (OER) plays a vital role in water splitting for renewable energy generation, making the development of cost-effective electrocatalysts essential in tackling global energy challenges. In this study, we synthesized ZIF-67@MIL-88 using a self-assembly method, with ZIF-67 serving as the precursor, followed by an aging process. The incorporation of iron-based MIL-88 significantly enhanced the surface morphology and porous structure of the catalytic material. Additionally, we prepared urchin-like CoNi@FeNi layered double hydroxides (LDHs) by etching ZIF-67@MIL-88. LDHs are known for their unique two-dimensional sheet structure and corrosion resistance. We achieved efficient OER catalytic activity through interlayer anion exchange by substituting metal cations at high temperatures. This study highlights recent advancements in the rational design of structurally unique and highly effective CoNi@FeNi-LDH composite materials using a synergistic strategy.
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