Linker Engineering of Sandwich-Structured Metal-Organic Framework Composites for Optimized Photocatalytic H2 Production

被引：122

作者：

Wang, Siyuan ^{[1
]}

Ai, Zhiwen ^{[1
]}

Niu, Xinwei ^{[2
]}

Yang, Weijie ^{[2
]}

Kang, Rong ^{[1
]}

Lin, Zhongyuan ^{[1
]}

Waseem, Amir ^{[3
]}

Jiao, Long ^{[1
]}

Jiang, Hai-Long ^{[1
]}

机构：

[1] Univ Sci & Technol China, Hefei Natl Res Ctr Phys Sci Microscale, Collaborat Innovat Ctr Chem Energy Mat iChEM, Dept Chem, Hefei 230026, Anhui, Peoples R China

[2] North China Elect Power Univ, Sch Energy & Power Engn, Baoding 071003, Hebei, Peoples R China

[3] Quaid I Azam Univ, Dept Chem, Islamabad 45320, Pakistan

来源：

ADVANCED MATERIALS | 2023年 / 35卷 / 39期

基金：

中国国家自然科学基金;

关键词：

hydrogen production; linker engineering; metal-organic frameworks; photocatalysis;

D O I：

10.1002/adma.202302512

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

While the microenvironment around catalytic sites is recognized to be crucial in thermocatalysis, its roles in photocatalysis remain subtle. In this work, a series of sandwich-structured metal-organic framework (MOF) composites, UiO-66-NH2@Pt@UiO-66-X (X means functional groups), is rationally constructed for visible-light photocatalytic H-2 production. By varying the X groups of the UiO-66-X shell, the microenvironment of the Pt sites and photosensitive UiO-66-NH2 core can be simultaneously modulated. Significantly, the MOF composites with identical light absorption and Pt loading present distinctly different photocatalytic H-2 production rates, following the X group sequence of H > Br > NA (naphthalene) > OCH3 > Cl > NO2. UiO-66-NH2@Pt@UiO-66-H demonstrates H-2 production rate up to 2708.2 & mu;mol g(-1) h(-1), & AP;222 times that of UiO-66-NH2@Pt@UiO-66-NO2. Mechanism investigations suggest that the variation of the X group can balance the charge separation of the UiO-66-NH2 core and the proton reduction ability of Pt, leading to an optimal activity of UiO-66-NH2@Pt@UiO-66-H at the equilibrium point.

引用

页数：7

共 53 条

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