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

作者：Haoyu Sun, Haili Lin, Xuemei Jia*, Xinyue Li, Shuang Li, Xin Jin, Qianlong Wang, Shifu Chen*, Jing Cao*

单位：Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education; College of Chemistry and Materials Science, Huaibei, Anhui 235000, PR China

摘要：Metal ion cocatalysts have huge prospect for photocatalytic CO₂ 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−xCl−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 CO₂ 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 CO₂ reduction and organic pollutants oxidation.

影响因子：20.2

分区情况：一区

链接：https://doi.org/10.1016/j.apcatb.2024.124514