In:
Angewandte Chemie, Wiley, Vol. 134, No. 48 ( 2022-11-25)
Abstract:
The hetero‐atomic interaction has been the subject of many investigations, due to their heterogeneity, the individual roles of the atoms are still difficult to realize. Herein, an electrocatalyst with a hetero‐atomic pair confined on a tungsten phosphide (WP) substrate so that the Fe 3+ ‐site of the pair is distal to the surface is shown to deliver an extremely low overpotential of 192 mV at 10 mA cm −2 and one of the highest oxygen production turnover frequencies (TOF) of 2.1 s −1 at 300 mV under alkaline environment for the oxygen evolution reaction (OER). Operando characterization shows the Lewis acidic Fe 3+ site boosts a large population of Co 4+/3+ and the deprotonation of coordinated water, allowing simultaneously enhanced electron‐transfer as well as the proton‐transfer. A significant contribution from the WP substrate modulates the order of hydroxide transfer in the pre‐equilibrium step (PES) and rate‐determining‐step (RDS), leading to a remarkable OER performance.
Type of Medium:
Online Resource
ISSN:
0044-8249
,
1521-3757
DOI:
10.1002/ange.v134.48
DOI:
10.1002/ange.202211142
Language:
English
Publisher:
Wiley
Publication Date:
2022
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