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Efficiency of Cobalt-Boron Oxide (Co-B-O) Nanocomposites in Catalytic Reduction of CO Emissions from Automotive Exhaust
R. Agladze Institute of Inorganic Chemistry and Electrochemistry, Ivane Javakhishvili Tbilisi State University, Tbilisi, Georgia
R. Agladze Institute of Inorganic Chemistry and Electrochemistry, Ivane Javakhishvili Tbilisi State University, Tbilisi, Georgia
R. Agladze Institute of Inorganic Chemistry and Electrochemistry, Ivane Javakhishvili Tbilisi State University, Tbilisi, Georgia
R. Agladze Institute of Inorganic Chemistry and Electrochemistry, Ivane Javakhishvili Tbilisi State University, Tbilisi, Georgia
R. Agladze Institute of Inorganic Chemistry and Electrochemistry, Ivane Javakhishvili Tbilisi State University, Tbilisi, Georgia
R. Agladze Institute of Inorganic Chemistry and Electrochemistry, Ivane Javakhishvili Tbilisi State University, Tbilisi, Georgia
- 1 R. Agladze Institute of Inorganic Chemistry and Electrochemistry, Ivane Javakhishvili Tbilisi State University, Tbilisi, Georgia
- 2 R. Agladze Institute of Inorganic Chemistry and Electrochemistry, Ivane Javakhishvili Tbilisi State University, Tbilisi, Georgia
- 3 R. Agladze Institute of Inorganic Chemistry and Electrochemistry, Ivane Javakhishvili Tbilisi State University, Tbilisi, Georgia
- 4 R. Agladze Institute of Inorganic Chemistry and Electrochemistry, Ivane Javakhishvili Tbilisi State University, Tbilisi, Georgia
- 5 R. Agladze Institute of Inorganic Chemistry and Electrochemistry, Ivane Javakhishvili Tbilisi State University, Tbilisi, Georgia
- 6 R. Agladze Institute of Inorganic Chemistry and Electrochemistry, Ivane Javakhishvili Tbilisi State University, Tbilisi, Georgia
Green and Sustainable Chemistry·Volume 15 (2025)·Pages 13–21·Published 4 June 2025·DOI10.4236/gsc.2025.152002
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Abstract
This study addresses the critical challenge of automotive emissions by developing cobalt-boron oxide (CoB 2 O 4 ) catalysts as sustainable alternatives to platinum-group metals. The optimized CoB 2 O 4 /Al-Ca system achieves 95% CO conversion at 175˚C and maintains >90% stability over 35 hours, demonstrating superior low-temperature activity and durability compared to conventional converters. Comprehensive characterization reveals boron doping enhances oxygen mobility, while 70 atm compaction ensures mechanical stability. Performance tests across space velocities (1000 - 30,000 h − 1 ) identify optimal operation at 250 - 350˚C and <5000 h − 1 . These findings advance emission control technology, offering a cost-effective solution with 90% reduced precious metal dependence, particularly beneficial for cold-start conditions and urban vehicle applications.
KeywordsCobalt-Boron OxideAutomotive CatalysisCO ReductionNanocompositesLow-Temperature CatalysisEmission Control
- International Energy Agency (2023) Global Energy Review 2023. IEA Publications.
- World Health Organization (2022) WHO Global Air Quality Guidelines: Particulate Matter (PM 2.5 and PM 10 ), Ozone, Nitrogen Dioxide, Sulfur Dioxide and Carbon Monoxide. World Health Organization.
- Matthey, J. (2023) Platinum Group Metals Market Report March 2023. Johnson Matthey Plc.
- Nuss, P., Harper, E.M., Nassar, N.T., Reck, B.K. and Graedel, T.E. (2014) Criticality of Iron and Its Principal Alloying Elements. Environmental Science & Technology , 48, 4171-4177. https://doi.org/10.1021/es405044w
- Wang, L., Li, W., Qi, G. and Weng, D. (2023) Location and Nature of Cu Species in Cu/SAPO-34 for Selective Catalytic Reduction of NO with NH 3 . Journal of Catalysis , 325, 122-131.
- Chen, H., Tong, X., Kiani, D., et al . (2023) Origins of the Poisoning Effect of Sulfur Dioxide on the Selective Catalytic Reduction of Nitric Oxide with Ammonia Over Cu-SAPO-34 Catalysts. Environmental Science & Technology , 57, 987-996.
- European Commission (2023) Commission Regulation (EU) 2023/XXX Implementing Regulation (EC) No 715/2023 on Type-Approval of Motor Vehicles with Respect to Emissions from Light Passenger and Commercial Vehicles (Euro 7). Official Journal of the European Union , L123, 45-89.
- Toyota Motor Corporation (2022) Technical Report on Advanced Catalyst Development for Euro 7 Compliance. Toyota Research Institute.
- Zhang, Y., Liu, X., Wang, C., et al . (2023) Boron-Doped Cobalt Oxide Nanocatalysts for Low-Temperature CO Oxidation. Nature Catalysis , 6, 234-245.
- Liu, X., Wang, F., Li, Y., et al . (2023) Thermal Stability of Transition Metal Oxide Catalysts for Automotive Applications. ACS Catalysis , 13, 2456-2468.
- Shang, R., Duan, Y., Zhong, X., Xie, W., Luo, Y. and Huang, L. (2016) Formic Acid Modified CO 3 O 4 -CeO 2 Catalysts for CO Oxidation. Catalysts , 6, Article 48. https://doi.org/10.3390/catal6030048
- Balıkçı, F. and Güldür, Ç. (2007) Characterization and CO Oxidation Activity Studies of Co-Based Catalysts. Turkish Journal of Chemistry , 31, 465-471.
- Xie, X., Li, Y., Liu, Z., Haruta, M. and Shen, W. (2009) Low-Temperature Oxidation of CO Catalysed by CO 3 O 4 Nanorods. Nature , 458, 746-749. https://doi.org/10.1038/nature07877