题目：Synergistic internal electric field and Lewis acid–base dual sites for simultaneous CO₂ photoreduction and phenylcarbinol oxidation

作者：Haiteng Guo, Bo Weng, Yong Liu^*, Jun Hu^*, Raf Dewil, Sugang Meng^*

单位：Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education; School of Chemistry and Chemical Engineering, Huaibei Normal University, Huaibei 235000, P.R. China.

摘要： Constructing dual photocatalytic systems integrating CO₂ reduction with organic oxidation reoresents a promising strategy for achieving efficient redox cycling. However, such systems still face the challenges of severe charge recombination and limited CO₂ adsorption capacity. Here, we introduce K⁺ doping into CdS to create structural asymmetry, thereby enhancing the built-in electric field and forming Lewis acid-base dual sites. Combined theoretical calculation and experimental characterization confirm that K⁺ incorporation strengthens the internal electric field, boosting charge separation and driving concurrent CO₂ photoreduction and selective oxidation of phenylcarbinol. The optimal 0.1%K⁺-CdS sample exhibit enhanced intensity of internal electric field and charge density as compared to pristine CdS. Moreover, the engineered Lewis acid-base dual sites facilitate CO₂ adsorption and activation via a K⁺…C=O…Cd²⁺ interaction, which is beneficial to promote the rate-limiting step in CO₂ reduction. Maximum photocatalytic efficiency was achieved over the 0.1%K⁺-CdS, which yielded CO at 3 mmol g^-1 h^-1 and benzaldehyde at 3.43 mmol g^-1 h^-1. These values surpass the output of the pristine counterpart by factors of 2.0 and 2.6, respectively. This work highlights internal‑field and acid–base site co‑engineering as a feasible route to improve coupled photocatalytic redox performance.

分区情况:SCI一区TOP期刊

影响因子: 12.498

年、卷、页: 2026, 545, 178287. DOI: 10.1016/j.cej.2026.178287.

链接: //authors.elsevier.com/a/1nSJG4x7R2rxuF

（文、图：孟苏刚 / 审核：刘理华 / 审校： 孟令国 / 终审：赵娟 ）