Edge-oriented phosphatizing engineering of 2D Ni-MOFs with a tailored d-band center for boosting catalytic activity,Nanoscale

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Edge-oriented phosphatizing engineering of 2D Ni-MOFs with a tailored d-band center for boosting catalytic activity
Nanoscale ( IF 5.8 ) Pub Date : 2023-01-17 , DOI: 10.1039/d2nr06264j
Chongchong Wang _{1,

2} , Lulu Kong ₂ , Bingbing Chen ₃ , Lin Zhou ₂ , Wei Wang _{1,

2} , Shaohua Wei _{1,

2}

Affiliation

Metal–organic framework (MOF)-based heterostructures have aroused widespread interest owing to their extensive compositional tunability and interesting catalytic properties. However, the precise edge-oriented growth of transition metal compounds at the edges of 2D MOFs to construct edge mode heterostructures remains a great challenge due to their inherent thermodynamic instability. Here, edge-oriented growth of Ni₂P at the edges of a 2D Ni-MOF was achieved for the first time by precisely tuning the phosphorus source content and phosphating temperature. Owing to the formation of the edge mode Ni-MOF/Ni₂P heterostructure, the as-prepared heterostructure showed upregulated d-band center, more robust 4-nitrophenol (4-NP) adsorption capacity, lowered energy barrier of the rate-determining step (RDS), and higher specific surface area, resulting in the best performance of the hydrogenation reduction of 4-NP to 4-aminophenol (4-AP) in the presence of non-precious metal catalysts.

中文翻译：

二维 Ni-MOF 的边缘定向磷化工程，具有定制的 d 带中心以提高催化活性

基于金属有机骨架（MOF）的异质结构由于其广泛的组成可调性和有趣的催化性能而引起了广泛的兴趣。然而，由于过渡金属化合物固有的热力学不稳定性，过渡金属化合物在二维 MOF 边缘的精确边缘定向生长以构建边缘模式异质结构仍然是一个巨大的挑战。在这里，通过精确调整磷源含量和磷化温度，首次在 2D Ni-MOF 的边缘实现了Ni ₂ P的边缘定向生长。_{由于边缘模式 Ni-MOF/Ni 2}的形成P异质结构，所制备的异质结构显示出上调的d带中心，更强的4-硝基苯酚（4-NP）吸附能力，较低的速率决定步骤（RDS）的能垒和更高的比表面积，从而导致在非贵金属催化剂存在下，4-NP 加氢还原为 4-氨基苯酚 (4-AP) 的最佳性能。

更新日期：2023-01-17

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