AI Article Synopsis
- Amorphous metal-organic frameworks (MOFs) are promising for high-performance electrocatalysts in the oxygen evolution reaction, but face challenges like low electrical conductivity and stability.
- Researchers developed a new material, an amorphous-crystalline (AC) heterostructure, by embedding a crystalline metal sulfide within an amorphous NiFe-MOF, leading to improved catalytic performance.
- The resulting MS/NiFe-MOF demonstrated excellent performance with a low overpotential, minimal degradation over time, and potential for enhancing water-splitting systems.
Article Abstract
Amorphous metal-organic framework (MOF) materials have drawn extensive interest in the design of high-performance electrocatalysts for use in the electrochemical oxygen evolution reaction. However, there are limitations to the utilization of amorphous MOFs due to their low electrical conductivity and unsatisfactory stability. Herein, a novel amorphous-crystalline (AC) heterostructure is successfully constructed by synthesizing a crystalline metal sulfide (MS)-embedded amorphous NiFe-MOF, namely an MS/NiFe-MOF. It exhibits excellent catalytic performance (a low overpotential of 248 mV at 10 mA cm with a small Tafel slope of 50 mV decade), durability, and stability (only 8% degradation of the current density at a constant voltage after 24 h). This work thus sheds light on the engineering of highly efficient catalysts with AC heterointerfaces for optimizing water-splitting systems.
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| http://dx.doi.org/10.1021/acs.jpclett.2c03685 | DOI Listing |
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