J. Mater. Sci. Technol. ›› 2022, Vol. 110: 96-102.DOI: 10.1016/j.jmst.2021.08.082

• Research Article • Previous Articles     Next Articles

Catalytic reduction of carbon dioxide over two-dimensional boron monolayer

Chuangwei Liua,b, Tianyi Wanga,c, Derek Haod, Qinye Lic, Song Lib,*(), Chenghua Suna,c,**()   

  1. aSchool of Chemical Engineering and Energy Technology, Dongguan University of Technology, Dongguan 523808, China
    bKey Laboratory for Anisotropy and Texture of Materials, School of Materials Science and Engineering Northeastern University, Shenyang 110819, China
    cDepartment of Chemistry and Biotechnology and Centre for Translational Atomaterials, School of Science, Swinburne University of Technology, Hawthorn, Australian 3122, Australia
    dCentre for Technology in Water and Wastewater (CTWW), School of Civil and Environmental Engineering, University of Technology Sydney, New South Wales 2007, Australia
  • Received:2021-07-19 Revised:2021-08-16 Accepted:2021-08-22 Published:2021-11-10 Online:2021-11-10
  • Contact: Song Li,Chenghua Sun
  • About author:** School of Chemical Engineering and Energy Technol- ogy, Dongguan University of Technology, Dongguan 523808, China. E-mail addresses: chenghuasun@swin.edu.au (C. Sun).
    * E-mail addresses: lis@atm.neu.edu.cn (S. Li),

Abstract:

Carbon dioxide reduction (CRR) is an attractive strategy for alleviating global warming and producing valuable fuels. In this work, we study the catalytic conversion of CO2 to C1-C3 products on boron nanosheet in the presence of compressive strain by using density functional theory. Thermodynamic and microkinetic models are applied to demonstrate the favorable products, critical steps, and hydrogenation mechanisms. As demonstrated, the strain can turn metallic two-dimensional boron nanosheet to semiconductor, not only making boron sheets possess photo(electro)catalytic activity, but also improving energy efficiency and selectivity performance against hydrogen evolution reaction. By introducing the aqueous electrolytes, the hydrated alkali cations not only effect on the CO2 concentration, but also produce a bigger surface charge density and stronger interfacial electric filed. Especially, the selectivity of C2+ products is enhanced with the increase of alkali cations size by decreasing the kinetic barrier for CO dimerization and stabilizing the intermediates. The results highlight the significance of metal-free catalysts for CRR by the photoelectrochemical method and provide novel avenues for the development of new solar-energy utilization catalysts.

Key words: Carbon dioxide reduction, Metal-free, Boron nanosheet, Density functional theory, Strain engineering, Alkali cation