Optimization Strategies of Covalent Organic Frameworks and Their Derivatives for Electrocatalytic Applications

Abstract

Covalent organic frameworks (COFs) are crystalline organic porous polymers that can be precisely integrated by building blocks to achieve pre‐designed composition, components, and functions, making them a powerful platform for the development of molecular devices in the field of electrocatalysis. The precise control of channel/dopant positions and highly ordered network structures of COFs provide an ideal material system for the applications of advanced electrocatalysis. In this paper, the topological structure design and synthesis methods of COFs are reviewed in detail, and their design principles are deeply analyzed. In addition, the applications of COFs and their derivatives in the field of electrocatalysis are systematically summarized and the optimization strategies are proposed. Finally, the application prospects of COFs and their derivatives in electrocatalysis and the challenges that may be encountered in the future are prospected, providing helpful guidance for future research.

Nanoporous Metal/Covalent Organic Framework-Based Electrocatalysts for Water Splitting

“…In addition to providing these features, the conductive nature of certain COFs can also play a crucial role in their electrocatalytic activity. Besides these aspects, the stability and durability of COFs play crucial roles in ensuring long-term performance and reliability, even under challenging conditions such as exposure to harsh chemical environments and electrochemical potentials …”

Ultrafine Iridium Nanoparticles Anchored on Co-Based Metal–Organic Framework Nanosheets for Robust Hydrogen Evolution in Alkaline Media

“…This synergy elevates iridium to a position of high value for advanced electrocatalytic applications, leveraging its distinct properties for groundbreaking results. 43,44 Li and co-workers reported a catalyst with improved HER performance by incorporating Ir NPs into Ni-NDC, and the Ir@Ni-NDC had an optimal Ir content of 9.72 wt %. 45 of noble-metal NPs.…”

“…Iridium (Ir) offers distinct advantages over Ru as a catalyst, particularly in electrocatalytic applications like HER. − Ir stands out for its remarkable efficacy even at lower loadings, offering a more cost-efficient solution by requiring less material to attain high performance. , Furthermore, it demonstrates superior resistance to catalyst poisoning and boasts enhanced stability against oxidation and leaching, effectively addressing common drawbacks associated with platinum (Pt) and Ru. − The synergistic interaction between iridium and the support materials within the catalyst structures significantly enhances its overall performance. This synergy elevates iridium to a position of high value for advanced electrocatalytic applications, leveraging its distinct properties for ground-breaking results. , Li and co-workers reported a catalyst with improved HER performance by incorporating Ir NPs into Ni-NDC, and the Ir@Ni-NDC had an optimal Ir content of 9.72 wt % . All of the above MOFs-based catalysts have demonstrated high catalytic activity due to the formation of M–O–M bonds at the interface and avoiding the aggregation of noble-metal NPs. ,, Therefore, it is necessary and of great significance to investigate the HER catalytic behavior of 2D MOFs loaded with a low-mass ratio of noble metal and uncover the underlying electrocatalytic mechanism.…”

Medium-Entropy Co–Fe–Cr–Mo Spinel Nanoflowers as Electrocatalysts for Oxygen Evolution

“…In recent years, the research on water splitting mainly focuses on improving the activation and stability of transition metal-based electrocatalysts, which have reached the level of precious metal catalysts . The efficiency of the whole electrolysis process is mainly dependent on the four-electron oxygen evolution reaction (OER) with slow kinetics. − To improve the electrolysis efficiency, it is necessary to overcome the high OER overpotential. − Thus, nonprecious metal catalysts with excellent performance have been developed . To date, high-efficiency OER electrocatalysts in alkaline solutions are mainly composed of binary and ternary transition metals, such as NiFe, , CoFe, NiCo, NiCu, NiMo, NiCoFe, and CoFeCr .…”