钌掺杂二氧化钛上光催化将一氧化碳还原为甲烷：钌与氧空位的协同作用
Photocatalytic reduction of CO into CH over Ru-doped TiO: Synergy of Ru and oxygen vacancies.
作者信息
Zhou Yimeng, Zhang Qianxiao, Shi Xiangli, Song Qi, Zhou Changjian, Jiang Deli
机构信息
School of Chemistry and Chemical Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, PR China.
Institute for Energy Research, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, PR China.
出版信息
J Colloid Interface Sci. 2022 Feb 15;608(Pt 3):2809-2819. doi: 10.1016/j.jcis.2021.11.011. Epub 2021 Nov 6.
Photocatalytic conversion of CO and HO into CH is an intriguing approach to achieve solar energy utilization and CO conversion, yet remains challenging in conversion efficiency. In this study, we present a synthesis of defected TiO nanocrystal with oxygen vacancies (V) by a facile Ru doping-induced strategy under hydrothermal condition. The synergistic effect of Ru and oxygen vacancies contributed to the enhanced photocatalytic reduction of CO toward CH. Oxygen vacancies and doped Ru not only can synergistically promote the separation of photogenerated carriers, but also promote the CO adsorption, thus enhancing the photocatalytic activities. The optimal Ru-doped TiO (denoted as 1% Ru-TiO) exhibited a remarkable enhanced photocatalytic performance with a CH yield of 31.63 μmol·g·h, which is significantly higher than Ru-TiO and TiO counterparts. This study systematically investigates the multiple roles of Ru in CO reduction and provides new insights for the construction of metal oxide photocatalysts with oxygen vacancies by simple doping of metal ions.
将一氧化碳（CO）和水（H₂O）光催化转化为甲烷（CH₄）是实现太阳能利用和CO转化的一种有趣方法，但在转化效率方面仍具有挑战性。在本研究中，我们通过水热条件下简便的钌（Ru）掺杂诱导策略合成了具有氧空位（Vₒ）的缺陷型TiO₂纳米晶体。Ru和氧空位的协同效应有助于增强CO光催化还原为CH₄的能力。氧空位和掺杂的Ru不仅可以协同促进光生载流子的分离，还能促进CO的吸附，从而提高光催化活性。最佳的Ru掺杂TiO₂（表示为1% Ru-TiO₂）表现出显著增强的光催化性能，CH₄产率为31.63 μmol·g⁻¹·h，明显高于Ru-TiO₂和TiO₂对照物。本研究系统地研究了Ru在CO还原中的多种作用，并为通过简单的金属离子掺杂构建具有氧空位的金属氧化物光催化剂提供了新的见解。
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