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• W3149779042 endingPage "120174" @default.
• W3149779042 startingPage "120174" @default.
• W3149779042 abstract "MOF-derived amorphous metal hydroxide microarrays assembled on nickel foam (NF) were prepared by carefully controlling the electrochemical process. The reversible redox reactions activated by CV successfully induced the formation of highly active amorphous metal hydroxide microarrays with a large number of oxygen defects, which were revealed by DFT calculations to be true electrocatalytic active centers. • An in-situ electrochemical strategy for preparing amorphous metal hydroxide microarrays is reported. • The formation of defect-rich metal hydroxides by structural transformation is discussed. • The optimized a Co(OH) 2 -ZIF-L/NF possesses excellent electrocatalytic activity for OER. • It is demonstated that defective amorphous CoOOH is the real active species for OER. MOFs featuring adjustable functions show good prospects for creating low-cost oxygen evolution reaction (OER) electrocatalysts, but their poor stability and conductivity seriously limit their real applications. Herein, we report a general in-situ electrochemical approach for the synthesis of amorphous metal hydroxide-based microarrays assembled on nickel foam (NF) by using leaflike CoM-ZIF-L as precursors for boosting OER performance. It is demonstrated that an electrochemical cyclic voltammetry (CV) redox process can promote the ligand substitution of CoM-ZIF-L to afford highly-active amorphous metal hydroxides with abundant oxygen defects via activating the reversible redox of metal ions, removing 2-methylimidazole and subsequently capping OH − . As expected, the optimized a Co(OH) 2 -ZIF-L/NF can provide rich catalytic sites, good conductivity and short ion diffusion paths, all of which are responsible for its excellent OER activity. Further experiment and DFT calculation results confirm that the in-situ formed defective amorphous metal oxy(hydroxide) is the real active species for this electrocatalytic reaction." @default.
• W3149779042 created "2021-04-13" @default.
• W3149779042 creator A5018905298 @default.
• W3149779042 creator A5021523686 @default.
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• W3149779042 date "2021-09-01" @default.
• W3149779042 modified "2023-10-17" @default.
• W3149779042 title "Electrochemical synthesis of amorphous metal hydroxide microarrays with rich defects from MOFs for efficient electrocatalytic water oxidation" @default.
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• W3149779042 doi "https://doi.org/10.1016/j.apcatb.2021.120174" @default.
• W3149779042 hasPublicationYear "2021" @default.
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