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- Title
Atomically Dispersed Sn Confined in FeS<sub>2</sub> for Nitrate‐to‐Ammonia Electroreduction.
- Authors
Zhang, Guike; Wang, Fuzhou; Chen, Kai; Kang, Jilong; Chu, Ke
- Abstract
Electrocatalytic NO3− reduction to NH3 (NO3RR) is an efficient strategy to simultaneously mitigate NO3− contamination and produce sustainable NH3. Herein, atomically dispersed Sn confined in FeS2 (Sn‐FeS2) is reported as an effective and robust NO3RR catalyst, achieving a maximum NH3‐Faradaic efficiency of 96.7% with a corresponding NH3 yield rate of 15.8 mg h−1 cm−2, along with an excellent catalytic stability. Atomic coordination characterizations of Sn‐FeS2 unravel that single‐atomic Sn bonds with the surrounding Fe atoms to construct the unique p‐d hybridized Sn‐Fe pair sites. Combining theoretical investigations and operando spectroscopic measurements unveil that Sn‐Fe pair sites can synergistically promote the NO3− activation and N═O bond dissociation, accelerate the protonation energetics of NO3−‐to‐NH3 pathway and suppress the competing hydrogen evolution, eventually drastically enhancing the NO3RR activity and selectivity.
- Subjects
TIN; ORBITAL hybridization; PROTON transfer reactions; ELECTROLYTIC reduction; COORDINATION polymers
- Publication
Advanced Functional Materials, 2024, Vol 34, Issue 1, p1
- ISSN
1616-301X
- Publication type
Article
- DOI
10.1002/adfm.202305372