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Ir Nanoparticles Anchored on Metal‐Organic Frameworks for Efficient Overall Water Splitting under pH‐Universal Conditions by Jun Yang; Yong Shen; Yamei Sun; Jiahui Xian; Yanju Long; Guangqin Li is a Chemistry article available to read on EtoBox.
What is Ir Nanoparticles Anchored on Metal‐Organic Frameworks for Efficient Overall Water Splitting under pH‐Universal Conditions about?
The construction of high-activity and low-cost electrocatalysts is critical for efficient hydrogen production by water electrolysis. Herein, we developed an advanced electrocatalyst by anchoring well-dispersed Ir nanoparticles on nickel metal-organic framework (MOF) Ni-NDC (NDC: 2,6-naphthalenedicarboxylic) nanosheets. Benefiting from the strong synergy between Ir and MOF through interfacial NiÀ OÀ Ir bonds, the synthesized Ir@Ni-NDC showed exceptional electrocatalytic performance for hydrogen evolution reaction (HER), oxygen evolution reaction (OER) and overall water splitting in a wide pH range, superior to commercial benchmarks and most reported electrocatalysts. Theoretical calculations revealed that the charge redistribution of NiÀ OÀ Ir bridge induced the optimization of H 2 O, OH* and H* adsorption, thus leading to the accelerated electrochemical kinetics for HER and OER. This work provides a new clue to exploit bifunctional electrocatalysts for pH-universal overall water splitting.
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- Author
- Jun Yang; Yong Shen; Yamei Sun; Jiahui Xian; Yanju Long; Guangqin Li
- Publisher
- Wiley
- Published
- 2023
- Language
- EN
- Field
- Chemistry (Physical Sciences)