润色A review of defect engineering in layered double hydroxide-based electrocatalysts for the oxygen evolution reaction

Title: A Comprehensive Review of Defect Engineering in Layered Double Hydroxide-Based Electrocatalysts for the Oxygen Evolution Reaction

Abstract: Layered double hydroxides (LDHs) have emerged as promising electrocatalysts for the oxygen evolution reaction (OER) due to their unique structural properties and high catalytic activity. However, the efficiency and stability of LDH-based OER electrocatalysts are still limited by several factors, including the presence of defects in their crystal structure. Defect engineering has recently gained attention as a strategy to enhance the performance of LDH-based electrocatalysts. In this review, we provide a comprehensive overview of the recent advances in defect engineering in LDH-based electrocatalysts for the OER.

Introduction: The oxygen evolution reaction (OER) plays a crucial role in various electrochemical processes, such as water splitting and rechargeable metal-air batteries. Layered double hydroxides (LDHs) have shown great potential as efficient electrocatalysts for the OER due to their low cost, abundance, and unique layered structure. However, the presence of defects in LDHs can significantly affect their electrocatalytic activity and stability. Defect engineering, which involves deliberate introduction or manipulation of defects in LDH-based electrocatalysts, has emerged as a promising strategy to enhance their OER performance.

Methods: In this review, we systematically summarize the recent progress in defect engineering in LDH-based electrocatalysts for the OER. We discuss various methods for defect engineering, including ion doping, anion vacancies, and oxygen vacancies. The effects of these defects on the electrocatalytic activity, stability, and reaction kinetics of LDH-based electrocatalysts are thoroughly examined. Furthermore, we discuss the underlying mechanisms and propose strategies to optimize defect engineering in LDH-based electrocatalysts.

Results and Discussion: Defect engineering has been demonstrated to significantly improve the OER performance of LDH-based electrocatalysts. Ion doping with transition metal cations can enhance the charge transfer kinetics and stabilize the electrocatalyst against corrosion. Anion vacancies and oxygen vacancies can create active sites for the OER and facilitate the oxygen evolution process. The effects of defect engineering on the electronic structure and surface chemistry of LDH-based electrocatalysts are discussed in detail.

Conclusion: In conclusion, defect engineering has emerged as a promising strategy to enhance the OER performance of LDH-based electrocatalysts. However, further research is needed to fully understand the effects of specific defects and their interactions on the electrocatalytic activity and stability of LDH-based electrocatalysts. The optimization of defect engineering strategies and the development of advanced characterization techniques will be crucial for the design and synthesis of highly efficient and stable LDH-based electrocatalysts for the OER