Journal
CHEMICAL ENGINEERING JOURNAL
Volume 430, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.132733
Keywords
Metallocene derivatives; Metal-organic frameworks; Electrocatalysis; Oxygen evolution reactions; Urea oxidation reactions
Categories
Funding
- National Key R&D Program of China [2017YFE0120500]
- National Natural Science Foundation of China [51972129]
- South Xinjiang Inno-vation and Development Program of Key Industries of Xinjiang Production and Construction Corps [2020DB002]
- Key Research and Development Program of Hubei [2020BAB079]
- Opening Project of State Key Laboratory of High Performance Ceramics and Superfine Microstructure [SKL202008SIC]
- Fundamental Research Funds for the Central Universities [HUST 2018KFYYXJJ051, 2019KFYXMBZ076]
- Research Foundation Flanders (FWO)
- KU Leuven BOF program [C14/18/074]
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This study successfully prepared a two-dimensional metal-organic framework (MOF) with mono-coordinated ferrocenecarboxylic acid (Fc), which exhibited remarkable electrocatalytic activity, suggesting a new pathway for highly efficient MOF-based electrocatalysts.
Metal-organic frameworks (MOFs) are generally recognized as promising platforms for energy conversion and storage due to their structural diversity and ligands tunability features, yet there are still challenges before practical applications become possible. Herein, a two-dimensional metal-organic framework (MOF) with mono-coordinated ferrocenecarboxylic acid (Fc) is successfully prepared. Different from the pure MOF, the as-prepared Fc-MOF offers remarkable electrocatalytic activity, exhibiting a low overpotential of 273 mV (vs. reversible hydrogen electrode) at 200 mA cm(-2) and a small driving potential of 1.49 V (10 mA cm(-2)) for the overall water splitting with Pt/C as a counterpart cathode. The advance nature of the as-prepared Fc-MOF could also be evidenced by its remarkable Urea oxidation reaction (UOR) activity as it drives a current density of 10 mA cm(-2) with a potential of 1.35 V. Theoretical calculations and experimental results demonstrate that the introduction of highly electronegative Fc not only change the electronic structure of MOF but also expose more unsaturated active sites, which in turn varies the adsorption features of the intermediate species during the catalytic process. This work represents a new pathway for exploration of highly efficient MOF based electrocatalysts.
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