Efficiency of Cobalt-Boron Oxide (Co-B-O) Nanocomposites in Catalytic Reduction of CO Emissions from Automotive Exhaust

This study addresses the critical challenge of automotive emissions by developing cobalt-boron oxide (CoB2O4) catalysts as sustainable alternatives to platinum-group metals. The optimized CoB2O4/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 −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.