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Boosting Catalytic Oxidative Desulfurization Performance over Yolk-Shell Nickel Molybdate Fabricated by Defect
Xin An1, Lingchao Xu1, Lixian Xu1
1Institute for Energy Research, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China.
Inorganic Chemistry
|May 25, 2023
Summary
A novel yolk-shell nickel molybdate catalyst with oxygen vacancies was developed using defect engineering. This advanced catalyst demonstrates high efficiency in activating hydrogen peroxide for oxidative desulfurization and maintains stability over multiple cycles.
Area of Science:
- Materials Science
- Catalysis
- Surface Chemistry
Background:
- Optimizing catalyst surface properties is crucial for advanced catalytic applications.
- Nickel molybdate is a promising material, but its catalytic efficiency can be limited by surface characteristics.
Purpose of the Study:
- To design and synthesize a yolk-shell nickel molybdate catalyst with abundant oxygen vacancies (YS-VO-NMO) using an acid-assisted defect engineering strategy.
- To investigate the impact of the yolk-shell structure and oxygen vacancies on catalytic performance, specifically in oxidative desulfurization.
Main Methods:
- Rational architectural design and synthesis of yolk-shell nickel molybdate.
- Acid-assisted defect engineering to introduce oxygen vacancies.
- Characterization of the catalyst's structure, surface properties, and electronic structure.
- Evaluation of catalytic activity in hydrogen peroxide activation and oxidative desulfurization.
Main Results:
- The synthesized YS-VO-NMO exhibits a unique yolk-shell structure with enhanced mass transfer and active site exposure.
- Defect engineering successfully modulated the electronic structure, leading to an enrichment of oxygen vacancies.
- The YS-VO-NMO catalyst achieved 99.5% catalytic activity in hydrogen peroxide activation and demonstrated high desulfurization efficiency.
- The catalyst maintained its high efficiency after eight recycling tests, indicating excellent stability.
Conclusions:
- The defect-engineered yolk-shell nickel molybdate (YS-VO-NMO) is a highly effective catalyst for oxidative desulfurization.
- The combination of yolk-shell architecture and oxygen vacancies significantly enhances catalytic performance and stability.
- This work offers a new strategy for designing advanced defective materials for diverse catalytic applications.
