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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.

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

  AUTHORS: Paata Nikoleishvili, Gigla Tsurtsumia, Nana Koiava, Tina Lejava, Rusudan Kurtanidze, Nunu Jokhadze

  KEYWORDS: Cobalt-Boron Oxide, Automotive Catalysis, CO Reduction, Nanocomposites, Low-Temperature Catalysis, Emission Control

  JOURNAL NAME: Green and Sustainable Chemistry, Vol.15 No.2, May 31, 2025

  ABSTRACT: 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.