Journal
CHEMICAL ENGINEERING JOURNAL
Volume 400, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2020.125884
Keywords
Electrodeposition; Metal-organic frameworks; Heterostructure; Oxygen evolution reaction; DFT calculation
Categories
Funding
- National Natural Science Foundation [21575090]
- High-level Teachers in Beijing Municipal Universities in the Period of 13th Five-year Plan [CITTCD20190330]
- Scientific Research Project of Beijing Educational Committee [KM201810028008]
- Youth Innovative Research Team of Capital Normal University and Capacity Building for Sci-Tech Innovation Fundamental Scientific Research Funds [19530050179, 025185305000/195]
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Rational modification of coordination environment on metal-organic frameworks (MOFs) have a strong impact on the performance of heterogeneous catalysis. Here, we demonstrate how tuning the surrounding environment on metals centers of MOFs can substantially enhance the oxygen evolution reaction (OER) efficiency. The MIL59(FeNi)/Co NSs nano-heterostructure was formed by anchoring MIL-59(FeNi) MOFs on urchin-like Co nanosheet arrays. Metal-metal synergistic effect was validated to influence the coordination environment on MOFs, DFT calculations suggests that the charge transfer from the Co substrate to MIL-59 on a formed -COOCo geometry should be responsible for excellent activity. Acting as OER electrocatalyst, the MIL-59(FeNi)/Co NSs requires a low overpotential of 216 mV to arrive at 20 mA cm(-2) and obtains a low Tafel slope value of 38.46 mV dec(-1). The facile synthetic route and proposed strategy would arouse more attention to design and utilize high-performance metal-hybrid supported MOFs for highly efficient electrochemical processes.
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