Tuning the selectivity of the CO2 hydrogenation reaction using boron-doped cobalt-based catalysts

Jiaqi Wang; Kaihong Liu; Jingjing Zhao; Xiuping Li; Bolin Yin; Bo Jiang; Hexing Li

doi:10.1039/d3ra07488a

Tuning the selectivity of the CO₂ hydrogenation reaction using boron-doped cobalt-based catalysts

RSC Adv. 2024 Feb 21;14(10):6502-6507. doi: 10.1039/d3ra07488a.

Authors

Jiaqi Wang^{1

2}, Kaihong Liu², Jingjing Zhao², Xiuping Li², Bolin Yin², Bo Jiang², Hexing Li^{1

2}

Affiliations

¹ School of Chemistry and Molecular Engineering, East China University of Science and Technology 130 Meilong Road Shanghai 200237 China.
² Chinese Education Ministry Key Lab, Joint International Research Lab of Resource Chemistry, Shanghai Frontiers Science Center of Biomimetic Catalysis, College of Chemistry and Materials Science, Shanghai Normal University Shanghai 200234 China hexing-li@shnu.edu.cn.

Abstract

Direct CO₂ hydrogenation to value-added chemicals is a promising path toward realizing the "carbon-neutral" goal. However, controlling the selectivity of CO₂ hydrogenation toward desired products (e.g., CO and CH₄) using non-precious metal-based catalysts is important but challenging. It is imperative to explore catalysts with high activity and stability. Herein, boron-doped cobalt nanoparticles supported on H-ZSM-5 were devised for CO₂ hydrogenation to produce CO in a gas-solid flow system. Our results demonstrate that boron doping not only increases the CO₂ adsorption capability of the catalyst but also optimizes the electronic state of Co for CO desorption during hydrogenation process. As a result, the boron-doped cobalt catalysts displayed an enhanced CO selectivity of 94.5% and a CO₂ conversion rate of 45.6%, which is much higher than that of Co-ZSM-5 without boron doping. This study shows that the strategic design of metal borides is important for controlling the selectivity of desired products in the CO₂ hydrogenation reaction.