Cobalt coordinated olefin-linked covalent organic frameworks toward highly efficient photocatalytic hydrogen production

IF 6.9 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science Pub Date : 2024-12-01 DOI:10.1016/j.apsusc.2024.161988

Xiaoxia Cui, Xufeng Ji, Xuan Zhang, Xing Ding, Bo Chai, Deng Ding, Yi Yang, Xiaohu Zhang, Hao Chen

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引用次数: 0

Abstract

Covalent organic frameworks (COFs) have emerged as a crystalline porous materials for photocatalytic hydrogen production. However, the design of efficient COF-based catalyst for satisfactory solar-to-hydrogen energy conversion is still challenging. Here, cobalt was anchored on the bipyridine moieties in the framework of olefin-linked sp²c-COF_dpy by convenient post-metalation (sp²c-COF_dpy-Co). Experimental results showed that sp²c-COF_dpy-Co exhibited wider visible light absorption region and quicker photogenerated e^-/h⁺ separation efficiency than sp²c-COF_dpy. Photocatalytic experiments revealed that sp²c-COF_dpy-Co was highly efficient for H₂ production after photodeposition of Pt co-catalyst (Pt@sp²c-COF_dpy-Co). The optimized Pt@sp²c-COF_dpy-Co exhibited a high photocatalytic H₂ production rate of 324.4 μmol/h under visible light irradiation in the presence of 1.0 wt% Pt as co-catalyst, which was higher than Pt@sp²c-COF_dpy-Fe and Pt@sp²c-COF_dpy-Ni, and it was much higher than that of its counterparts and many reported works. This work provides new insights into design of highly efficient COF-based catalyst for photocatalytic H₂ production.

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面向高效光催化制氢的钴配位烯烃共价有机框架

共价有机框架（COFs）是一种用于光催化制氢的晶体多孔材料。然而，设计高效的cof基催化剂以实现令人满意的太阳能-氢能源转换仍然具有挑战性。在这里，钴通过方便的后金属化（sp2c-COFdpy- co）被锚定在烯烃连接的sp2c-COFdpy框架中的联吡啶基团上。实验结果表明，与sp2c-COFdpy相比，sp2c-COFdpy- co具有更宽的可见光吸收区和更快的光生e-/h+分离效率。光催化实验表明，光沉积Pt共催化剂后，sp2c-COFdpy-Co产氢效率很高（Pt@sp2c-COFdpy-Co）。优化后的Pt@sp2c-COFdpy-Co在1.0 wt% Pt的助催化剂作用下，在可见光照射下的光催化制氢速率为324.4 μmol/h，高于Pt@sp2c-COFdpy-Fe和Pt@sp2c-COFdpy-Ni，远高于同类产品和许多文献报道的产氢速率。本研究为设计高效的cof基光催化制氢催化剂提供了新的思路。

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来源期刊

Applied Surface Science 工程技术-材料科学：膜

CiteScore

12.50

自引率

7.50%

发文量

3393

审稿时长

67 days

期刊介绍： Applied Surface Science covers topics contributing to a better understanding of surfaces, interfaces, nanostructures and their applications. The journal is concerned with scientific research on the atomic and molecular level of material properties determined with specific surface analytical techniques and/or computational methods, as well as the processing of such structures.