Confining electrocatalytic nickel complex in metal-organic frameworks for efficient hydrogen-evolution

被引:0
作者
Mani, Prabu [1 ]
Ahn, Hyokyum [2 ]
Son, Younghu [1 ]
Kim, Jiyun [1 ]
Rao, Purna Chandra [1 ]
Ahn, Hyun S. [1 ,2 ]
Yoon, Minyoung [1 ,3 ]
机构
[1] Kyungpook Natl Univ, KNU Inst Basic Sci, KNU G LAMP Res Ctr, Dept Chem, Daegu 41566, South Korea
[2] Yonsei Univ, Dept Chem, Seoul 03722, South Korea
[3] Luoyang Normal Univ, Sch Chem & Chem Engn, Luoyang, Henan, Peoples R China
关键词
Confinement effect; Electrocatalysis; Hydrogen evolution; Metal-organic framework; Nickel complex; FUEL-CELL; CHEMISTRY; CATALYST;
D O I
10.1016/j.inoche.2025.114463
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Growing energy demand has necessitated the development of an active, stable, and low-cost catalytic material for hydrogen production. Therefore, cavity-or pore-directed chemical transformation is a promising approach for improving catalyst stability and durability via pore confinement. In this work, we investigate the confinement effect of metal-organic frameworks (MOFs) in the presence of a Ni-based molecular catalyst for the hydrogen evolution reaction (HER). We choose stable and porous Zr-based MOFs (NU-1000 (1) and MOF-808 (2)) and a Nibased square-planar complex (Ni-ABT). The Ni-ABT was incorporated inside the pores of MOFs 1 and 2, and the integrated materials [Ni-ABT@NU-1000 (1 '), Ni-ABT@MOF-808 (2 ')] were successfully characterized by various instrumental methods. Electrochemical results revealed that the integrated materials 1 ' and 2 ' showed enhanced HER activity in phosphate buffer solution, significantly improving their onset potential compared with their pristine MOFs. Because of the pore confinement, the Ni-ABT catalyst is stabilized by 1, leading to a higher HER activity with long-term durability. We demonstrate the improved catalyst stability, enhanced HER performance, and long-time durability of the model catalyst by protecting it through the confinement effect of MOFs. This work provides new insights into the electrocatalytic reaction mechanism of HER via MOF confinement.
引用
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页数:11
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