In:
Angewandte Chemie, Wiley, Vol. 133, No. 20 ( 2021-05-10), p. 11290-11295
Abstract:
Two‐dimensional (2D) metal–organic framework nanosheets (MOF NSs) play a vital role in catalysis, but the most preparation is ultrasonication or solvothermal. Herein, a liquid–liquid interfacial synthesis method has been developed for the efficient fabrication of a series of 2D Ni MOF NSs. The active sites could be modulated by readily tuning the ratios of metal precursors and organic linkers (R M/L ). The Ni MOF NSs display highly R M/L dependent activities towards 2e oxygen reduction reaction (ORR) to hydrogen peroxide (H 2 O 2 ), where the Ni MOF NSs with the R M/L of 6 exhibit the optimal near‐zero overpotential, ca. 98 % H 2 O 2 selectivity and production rate of ca. 80 mmol g cat −1 h −1 in 0.1 M KOH. As evidenced by X‐ray absorption fine structure spectroscopy, the coordination environment of active sites changed from saturation to unsaturation, and the partially unsaturated metal atoms are crucial to create optimal sites for enhancing the electrocatalysis.
Type of Medium:
Online Resource
ISSN:
0044-8249
,
1521-3757
DOI:
10.1002/ange.v133.20
DOI:
10.1002/ange.202100897
Language:
English
Publisher:
Wiley
Publication Date:
2021
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