Chakraborty Avanti, Alam Akhtar, Pal Uttam, Sinha Archisman, Das Subhadip, Saha-Dasgupta Tanusri, Pachfule Pradip
Department of Chemical and Biological Sciences, S. N. Bose National Centre for Basic Sciences, Kolkata, 700106, India.
Department of Condensed Matter and Materials Physics, S. N. Bose National Centre for Basic Sciences, Kolkata, 700106, India.
Nat Commun. 2025 Jan 8;16(1):503. doi: 10.1038/s41467-025-55894-y.
The conversion of solar energy into chemical energy or high-value chemicals has attracted considerable research interest in the context of the global energy crisis. Hydrogen peroxide (HO) is a versatile and powerful oxidizing agent widely used in chemical synthesis and medical disinfection. HO also serves as a clean energy source in fuel cells, generating electricity with zero-carbon emissions. Recently, the sustainable production of HO from water and oxygen using covalent organic frameworks (COFs) as photocatalysts has attracted considerable attention; however, systematic studies highlighting the role of linkages in determining photocatalytic performance are scarce. Under these circumstances, herein, we demonstrate that varying the imine and hydrazone linkages within the framework significantly influences photocatalytic HO production. COFs with high-density hydrazone linkages, providing optimal docking sites for water and oxygen, enhance HO generation activity (1588 μmol g h from pure water in the air), leading to highly efficient solar-to-chemical energy conversion.
在全球能源危机的背景下，将太阳能转化为化学能或高价值化学品已引起了相当大的研究兴趣。过氧化氢（H₂O₂）是一种用途广泛且强大的氧化剂，广泛应用于化学合成和医学消毒。H₂O₂在燃料电池中也是一种清洁能源，可实现零碳排放发电。最近，使用共价有机框架（COFs）作为光催化剂从水和氧气中可持续生产H₂O₂引起了广泛关注；然而，突出连接键在决定光催化性能中作用的系统研究却很少。在这种情况下，在此我们证明，框架内亚胺和腙连接键的变化会显著影响光催化H₂O₂的产生。具有高密度腙连接键的COFs为水和氧气提供了最佳对接位点，增强了H₂O₂生成活性（在空气中从纯水中产生1588 μmol g⁻¹ h⁻¹），从而实现高效的太阳能到化学能的转化。
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