Herein, we report a designed binuclear Cu-salphen covalent organic framework (COF) that can be exfoliated into ultrathin nanosheets (denoted as Cu-salphen-HDCOF-NSs) for photoactive catalytic hydrogen evolution. Its conjugated porous architecture, coupled with high loading of isolated Cu active sites, can not only efficiently increase the access of photogenerated charge to the surface redox reaction centers, but can also prohibit the recombination of photoexcitons. As a result, Cu-salphen-HDCOF-NSs exhibit a remarkable hydrogen evolution rate of 36.99 mmol g⁻¹ h⁻¹ under visible-light irradiation, which is far higher than those of reported Pt-assisted COF photocatalytic systems. This finding provides new insight into the design of COF catalysts for efficient artificial photocatalysis.

中文翻译：

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具有双空位的预制共价有机骨架纳米片：锚固铜以实现高效的光催化氢气释放

在这里，我们报告设计的双核Cu-salphen共价有机框架（COF），可以将其剥离成超薄纳米片（表示为Cu-salphen-HDCOF-NSs）以进行光活性催化氢的释放。它的共轭多孔结构，加上高负载的孤立的铜活性位，不仅可以有效地增加光生电荷进入表面氧化还原反应中心的通道，还可以阻止光激子的重组。结果，Cu-salphen-HDCOF-NSs在可见光照射下表现出显着的氢释放速率，为36.99 mmol g ^-1 h ^-1，远高于报道的Pt辅助COF光催化体系。这一发现为高效人工光催化COF催化剂的设计提供了新的见识。