@article{Chen_Liu_Ding_Pang_Wang_Liu_Shen_Wang_Wu_Liu_Cao_Luo_Zhang_Zhu_Yao_2021, title={Surface Oxygen Injection in Tin Disulfide Nanosheets for Efficient CO2 Electroreduction to Formate and Syngas}, volume={13}, url={https://www.nmlett.org/index.php/nml/article/view/955}, DOI={10.1007/s40820-021-00703-6}, abstractNote={<p>Surface chemistry modification represents a promising strategy to tailor the adsorption and activation of reaction intermediates for enhancing activity. Herein, we designed a surface oxygen-injection strategy to tune the electronic structure of SnS<sub>2</sub> nanosheets, which showed effectively enhanced electrocatalytic activity and selectivity of CO<sub>2</sub> reduction to formate and syngas (CO and H<sub>2</sub>). The oxygen-injection SnS<sub>2</sub> nanosheets exhibit a remarkable Faradaic efficiency of 91.6% for carbonaceous products with a current density of 24.1&nbsp;mA&nbsp;cm<sup>−2</sup> at −0.9&nbsp;V vs RHE, including 83.2% for formate production and 16.5% for syngas with the CO/H<sub>2</sub> ratio of 1:1. By <em>operando</em> X-ray absorption spectroscopy, we unravel the in situ surface oxygen doping into the matrix during reaction, thereby optimizing the Sn local electronic states. <em>Operando</em> synchrotron radiation infrared spectroscopy along with theoretical calculations further reveals that the surface oxygen doping facilitated the CO<sub>2</sub> activation and enhanced the affinity for HCOO* species. This result demonstrates the potential strategy of surface oxygen injection for the rational design of advanced catalysts for CO<sub>2</sub> electroreduction.</p> <p>Highlights:</p> <p>1 A surface oxygen-injection strategy is proposed to synergistically modulate the electronic structure of the SnS<sub>2</sub> nanosheets, thereby regulating the oxophilicity of the catalyst surface.<br>2 The surface oxygen doping facilitates the CO<sub>2</sub> activation and enhances the affinity for HCOO* species.<br>3 The oxygen-injection SnS<sub>2</sub> nanosheets exhibit a remarkable Faradaic efficiency of 91.6% for carbonaceous products with a current density of 24.1 mA cm<sup>−2</sup> at -0.9 V vs RHE.</p>}, journal={Nano-Micro Letters}, author={Chen, Tao and Liu, Tong and Ding, Tao and Pang, Beibei and Wang, Lan and Liu, Xiaokang and Shen, Xinyi and Wang, Sicong and Wu, Dan and Liu, Dong and Cao, Linlin and Luo, Qiquan and Zhang, Wei and Zhu, Wenkun and Yao, Tao}, year={2021}, month={Sep.}, pages={189} }