Li Chengjin, Zhou Xiaoxia, Zhang Qingming, Xue Yi, Kuang Zhaoyu, Zhao Han, Mou Chung-Yuan, Chen Hangrong
School of Materials and chemical, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai, 200093, P. R. China.
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai, 200050, P. R. China.
ChemSusChem. 2022 Apr 22;15(8):e202200188. doi: 10.1002/cssc.202200188. Epub 2022 Mar 23.
Using renewable energy to convert CO into liquid products, as a sustainable way to produce fuels and chemicals, has attracted intense attention. Herein, a novel heterostructured photocathode composed of Si wafer, TiO layer, and Sn metal particles has been successfully fabricated by combining of a facile hydrothermal and electrodeposition method. The obtained Sn/TiO /Si photocathode shows enhanced light absorption performance by the surface plasmon resonance effect of Sn metal. Especially, the Sn/TiO /Si photocathode together with rich oxygen vacancy defects jointly promote photoelectrochemical CO reduction, harvesting a high faradaic efficiency of HCOOH and a desirable average current density (-4.72 mA cm ) at -1.0 V vs. reversible hydrogen electrode. Significantly, the photocathode Sn/TiO /Si also shows good stability due to the design of protecting layer TiO . This study provides a facile strategy of constructing an efficient photocathode to improve the light absorption performance and the electron transfer efficiency, exhibiting great potential in the CO reduction.
利用可再生能源将一氧化碳转化为液体产品，作为一种生产燃料和化学品的可持续方式，已引起广泛关注。在此，通过简便的水热法和电沉积法相结合，成功制备了一种由硅片、二氧化钛层和锡金属颗粒组成的新型异质结构光阴极。所制备的锡/二氧化钛/硅光阴极通过锡金属的表面等离子体共振效应表现出增强的光吸收性能。特别是，锡/二氧化钛/硅光阴极与丰富的氧空位缺陷共同促进光电化学一氧化碳还原，在相对于可逆氢电极-1.0 V的电位下获得了较高的甲酸法拉第效率和理想的平均电流密度（-4.72 mA cm²）。值得注意的是，由于设计了保护层二氧化钛，光阴极锡/二氧化钛/硅也表现出良好的稳定性。本研究提供了一种构建高效光阴极以提高光吸收性能和电子转移效率的简便策略，在一氧化碳还原方面展现出巨大潜力。
