Efficient Photocatalytic Nitrogen Fixation - Enhanced Polarization, Activation, and Cleavage by Asymmetrical Electron Donation to NN Bond
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2019-10-31 |
| Journal | Advanced Functional Materials |
| Authors | Jili Yuan, Xuanying Yi, Yanhong Tang, Meijun Liu, Chengbin Liu |
| Institutions | State Key Laboratory of Chemobiosensing and Chemometrics, Hunan University |
| Citations | 128 |
Abstract
Section titled āAbstractāAbstract Photocatalytic nitrogen (N 2 ) fixation suffers from low efficiency due to the difficult activation of the strongly nonpolar Nļ£½N bond. In this study, a Ru-Co bimetal center is constructed at the interface of Ru/CoS x with Sāvacancy on graphitic carbon nitride nanosheets (RuāVsāCoS/CN). Upon adsorption, the two N atoms in N 2 are bridged to the Ru-Co center, and the asymmetrical electron donation from Ru and Co atoms to N 2 adsorbate highly polarized Nļ£½N bond to double bond order. The plasmonic electricāfieldāenhancement effect enables the Ru/CoS x interface to boost the generation of energetic electrons. The Schottky barrier between Ru and CoS x endows the interface with electron transfer from CoS x to Ru. The Ruāend bound N at the Ru-Co center is preferentially hydrogenated. As a result, the RuāVsāCoS/CN photocatalyst shows an NH 3 production rate of up to 0.438 mmol g ā1 h ā1 , reaching a high apparent quantum efficiency of 1.28% at 400 nm and solarātoāammonia efficiency of 0.042% in pure water under AM1.5G light irradiation.
Tech Support
Section titled āTech SupportāOriginal Source
Section titled āOriginal SourceāReferences
Section titled āReferencesā- 2013 - Catalytic Ammonia Synthesis: Fundamentals and Practice