Defect-induced hydrophilic CuMOF -modified CuBi2O4 for nitrate to ammonia reduction
Pengpeng Yang1, Yufei Wang1, Yuxin Fan1
1School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China.
This study introduces a novel CuBi2O4/CuMOF material for green synthetic ammonia (NH3) production via photoelectrochemical nitrate reduction (PEC NIRR). The material enhances water splitting and ammonia yield, offering a promising pathway for sustainable chemical synthesis.
Area of Science:
- Green Chemistry
- Materials Science
- Electrochemistry
Background:
- Photoelectrochemical nitrate reduction (PEC NIRR) offers a sustainable route for synthetic ammonia (NH3) production.
- Controlling interfacial reactions to favor nitrate reduction over hydrogen evolution is crucial for efficient PEC NIRR.
Purpose of the Study:
- To develop a novel CuBi2O4/CuMOF material for enhanced PEC NIRR.
- To investigate the role of defect-induced hydrophilicity in improving catalytic performance.
Main Methods:
- Fabrication of a CuBi2O4/CuMOF heterostructure.
- Characterization of material properties, including hydrophilicity and defect structure.
- Evaluation of PEC NIRR performance, measuring NH3 yield and selectivity.
Main Results:
- The CuBi2O4/CuMOF material demonstrated excellent hydrophilicity due to its defect structure, promoting water adsorption and cleavage.
- Active hydrogen radical generation was enhanced, improving catalytic kinetics.
- Achieved a 3.12-fold increase in NH3 yield and a 2.08-fold increase in NH3 selectivity compared to CuBi2O4 alone.
Conclusions:
- Defect-induced hydrophilicity in CuMOF plays a critical role in generating active hydrogen species for efficient PEC NIRR.
- The developed CuBi2O4/CuMOF material presents a promising strategy for designing advanced photoelectrochemical systems for sustainable ammonia synthesis.
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