دورية أكاديمية
Hetero‐Atomic Pairs with a Distal Fe3+‐Site Boost Water Oxidation.
| العنوان: | Hetero‐Atomic Pairs with a Distal Fe3+‐Site Boost Water Oxidation. |
|---|---|
| المؤلفون: | Zhu, Yanping, Chen, Gao, Chu, You‐Chiuan, Hsu, Chia‐Shuo, Wang, Jiali, Tung, Ching‐Wei, Chen, Hao Ming |
| المصدر: | Angewandte Chemie; 11/25/2022, Vol. 134 Issue 48, p1-8, 8p |
| مصطلحات موضوعية: | OXIDATION of water, OXYGEN evolution reactions, OXYGEN reduction, PROTON transfer reactions |
| مستخلص: | 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 Fe3+‐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 Fe3+ site boosts a large population of Co4+/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. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: | Complementary Index |
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