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Dual structure cobalt sites on surface hydroxyl and oxygen vacancy of BiOCl for cooperative CO2 reduction and tetracycline oxidation.

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Title: Dual structure cobalt sites on surface hydroxyl and oxygen vacancy of BiOCl for cooperative CO2 reduction and tetracycline oxidation.
Authors: Sun, Haoyu1 (AUTHOR), Lin, Haili1 (AUTHOR), Jia, Xuemei1 (AUTHOR) XuemeiJia@njust.edu.cn, Li, Xinyue1 (AUTHOR), Li, Shuang1 (AUTHOR), Jin, Xin1 (AUTHOR), Wang, Qianlong1 (AUTHOR), Chen, Shifu1 (AUTHOR) chshifu@chnu.edu.cn, Cao, Jing1 (AUTHOR) caojing@chnu.edu.cn
Source: Applied Catalysis B: Environment & Energy. Dec2024, Vol. 359, pN.PAG-N.PAG. 1p.
Subjects: Carbon dioxide, Density functional theory, Electron capture, Metal ions, Hydrogen ions
Abstract: Metal ion cocatalysts have huge prospect for photocatalytic CO 2 reduction coupled with organic decomposition because of their cost effectiveness and abundant active sites. Herein, we exploit a defect−group oriented tactic to induce dual−structured Co sites on BiOCl with rich surface hydroxyls (OHs) and oxygen vacancies (OVs) (labeled as BiO 1− x Cl−OH), in which the surface OHs and OVs acted as anchoring points to anchor Co2+ ions. Density functional theory calculations manifested that surface OHs anchored Co2+ ions via hydrogen bonding to produce tight OH−Co sites, meanwhile, surface OVs with unsaturated metal sites and unpaired electrons captured Co2+ ions through chemical bonding to form close−knit OV−Co site. The as−generated OV−Co and OH−Co site served as reductive and oxidative cocatalyst for CO 2 reduction and tetracycline oxidation, respectively, thereby achieving high−efficiency redox activity. This work provided a novel strategy to devise progressive dual functional metal ions cocatalysts for high−efficiency CO 2 reduction and organic pollutants oxidation. [Display omitted] • Dual−structured Co sites on BiOCl with rich surface OHs and OVs was designed. • The as−generated OV−Co site acted as reductive cocatalyst for CO 2 reduction. • The OH−Co site served as oxidative cocatalyst for organic pollutant oxidation. • Coupled reaction system actualized the full utilization of the charges. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:Metal ion cocatalysts have huge prospect for photocatalytic CO 2 reduction coupled with organic decomposition because of their cost effectiveness and abundant active sites. Herein, we exploit a defect−group oriented tactic to induce dual−structured Co sites on BiOCl with rich surface hydroxyls (OHs) and oxygen vacancies (OVs) (labeled as BiO 1− x Cl−OH), in which the surface OHs and OVs acted as anchoring points to anchor Co2+ ions. Density functional theory calculations manifested that surface OHs anchored Co2+ ions via hydrogen bonding to produce tight OH−Co sites, meanwhile, surface OVs with unsaturated metal sites and unpaired electrons captured Co2+ ions through chemical bonding to form close−knit OV−Co site. The as−generated OV−Co and OH−Co site served as reductive and oxidative cocatalyst for CO 2 reduction and tetracycline oxidation, respectively, thereby achieving high−efficiency redox activity. This work provided a novel strategy to devise progressive dual functional metal ions cocatalysts for high−efficiency CO 2 reduction and organic pollutants oxidation. [Display omitted] • Dual−structured Co sites on BiOCl with rich surface OHs and OVs was designed. • The as−generated OV−Co site acted as reductive cocatalyst for CO 2 reduction. • The OH−Co site served as oxidative cocatalyst for organic pollutant oxidation. • Coupled reaction system actualized the full utilization of the charges. [ABSTRACT FROM AUTHOR]
ISSN:09263373
DOI:10.1016/j.apcatb.2024.124514