Photochemical transformation of UiO-66-NH2 during hydrogen generation under solar irradiation

IF 3.4 3区化学 Q2 CHEMISTRY, PHYSICAL

Catalysis Communications Pub Date : 2024-02-01 DOI:10.1016/j.catcom.2024.106858

Lorena Gudiño, Manuel Peñas-Garzón, Juan J. Rodriguez, Jorge Bedia, Carolina Belver

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Abstract

This work reports for the first time the photochemical transformation suffered by the UiO-66-NH₂ MOF during hydrogen production under solar irradiation using different scavengers. Triethanolamine caused the complete dissolution of the MOF, while Na₂S/Na₂SO₃ transformed the UiO-66-NH₂ into a novel Zr-based material characterized by an amorphous structure with a production rate of 0.439 μmol H₂·g_cat⁻¹·h⁻¹. The MOF-derived material maintained its performance during long-term on-stream experiments thanks to the electron transfer from the sulfide/sulfite ions to the valence band of the photocatalyst. However, significant doubts about the stability of UiO-66NH₂ and other MOFs in the photocatalytic generation of hydrogen are arisen.

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太阳照射下制氢过程中 UiO-66-NH2 的光化学转化

这项研究首次报道了 UiO-66-NH2 MOF 在太阳辐照下利用不同的清除剂制氢过程中发生的光化学转变。三乙醇胺导致 MOF 完全溶解，而 Na2S/Na2SO3 则将 UiO-66-NH2 转化为一种新型 Zr 基材料，该材料具有无定形结构，制氢率为 0.439 μmol H2-gcat-1-h-1。由于电子从硫化物/亚硫酸根离子转移到光催化剂的价带，MOF 衍生材料在长期在线实验中保持了其性能。然而，人们对 UiO-66NH2 和其他 MOF 在光催化制氢过程中的稳定性产生了极大的怀疑。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Catalysis Communications 化学-物理化学

CiteScore

6.20

自引率

2.70%

发文量

183

审稿时长

46 days

期刊介绍： Catalysis Communications aims to provide rapid publication of significant, novel, and timely research results homogeneous, heterogeneous, and enzymatic catalysis.