Self-templated formation of twin-like metal-organic framework nanobricks as pre-catalysts for efficient water oxidation

被引:16
|
作者
Ma, Fei-Xiang [1 ,2 ]
Lyu, Fucong [3 ]
Diao, Yingxue [4 ]
Zhou, BinBin [1 ,2 ,3 ]
Wu, Jianghua [5 ,6 ]
Kang, Fengwen [3 ]
Li, Zebiao [4 ]
Xiao, Xufen [4 ]
Wang, Peng [5 ,6 ]
Lu, Jian [1 ,2 ,3 ,7 ]
Li, Yang Yang [1 ,2 ,4 ]
机构
[1] City Univ Hong Kong, Ctr Adv Struct Mat, Greater Bay Joint Div, Shenyang Natl Lab Mat Sci,Shenzhen Res Inst, Shenzhen 518057, Peoples R China
[2] City Univ Hong Kong, Hong Kong Branch, Natl Precious Met Mat Engn Res Ctr, Hong Kong 999077, Peoples R China
[3] City Univ Hong Kong, Dept Mech Engn, Greater Bay Joint Div, Shenyang Natl Lab Mat Sci, Hong Kong 999077, Peoples R China
[4] City Univ Hong Kong, Dept Mat Sci & Engn, Hong Kong 999077, Peoples R China
[5] Nanjing Univ, Coll Engn & Appl Sci, Collaborat Innovat Ctr Adv Microstruct, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
[6] Nanjing Univ, Ctr Microstruct Quantum Mat, Nanjing 210093, Peoples R China
[7] CityU Shenzhen Futian Res Inst, 3 Binglang Rd,Fubao St, Shenzhen 518045, Peoples R China
基金
国家重点研发计划;
关键词
twin-like structures; metal-organic frameworks; oxygen evolution reaction; self-templated; pre-catalysts; EVOLUTION; OXYGEN; ELECTROCATALYST; NANOSHEETS; TEMPERATURE; MOF-5; FILM;
D O I
10.1007/s12274-021-3885-y
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Fabrication of single-crystalline metal-organic framework (MOF) hollow nanostructures with two-dimensional (2D) morphologies is a challenging task. Herein, twin-like MOF nanobricks, a quasi-hollow 2D architecture, with multi-metal nodes and replaceable organic ligands, are uniformly and firmly grown on conductive Ni foam through a generic one-pot approach. The formation process of twin-like MOF nanobricks mainly includes selective epitaxial growth of Fe-rich MOF layer and simultaneously dissolution of the pre-formed Ni-rich metal-organic frameworks (MOFs), all of which can be ascribed to a special self-templated mechanism. The fantastic structural merits of twin-like MOF nanobrick arrays, featuring highly exposed active sites, remarkable electrical conductivity, and hierarchical porosities, enable this material for efficient electrocatalysis. Using bimetallic NiFe-MOFs grown on Ni foam as an example, the resultant twin-like nanobrick arrays can be directly utilized as three-dimensional (3D) integrated electrode for high-performance water oxidation in 1 M KOH with a low overpotential, fast reaction kinetics (28.5 mV.dec(-1)), and superb stability. Interestingly, the unstable NiFe-MOFs were served as an oxygen evolution reaction (OER) pre-catalyst and the single-crystalline NiFe-MOF precursor can be in-situ topochemically regulated into porous and low-crystalline NiFeOx nanosheets during the OER process. This work extends the hollowing strategy to fabricate hollow MOFs with 2D architectures and highlights their direct utilization for advanced electrocatalysis.
引用
收藏
页码:2887 / 2894
页数:8
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