Liu Yu-Wei, Guo Shao-Hong, You Si-Qi, Sun Chun-Yi, Wang Xin-Long, Zhao Liang, Su Zhong-Min
Institute of Functional Material Chemistry, Northeast Normal University Changchun, 130024 Jilin, People's Republic of China.
Nanotechnology. 2020 May 22;31(21):215605. doi: 10.1088/1361-6528/ab72be. Epub 2020 Feb 4.
Halide perovskites have been employed as photocatalysts for CO photoreduction due to their excellent optical properties and unique electronic structure. However, their photocatalytic performance is relatively poor. Herein, we demonstrate a new strategy with Mn-doped CsPb(Br/Cl) mixed-halide perovskites as catalysts to enhance the efficiency of CO photoreduction. By tuning the content of Mn, a series of CsPb(Br/Cl):Mn perovskites are obtained and show high efficiency in CO conversion to CO and CH. For the optimum catalyst sample, especially, the yields of CO and CH reach 1917 μmol g and 82 μmol g which are 14.2 and 1.4 times higher than those of CsPbBr. This work provides new insights into improving the reactivity of perovskites in CO photoreduction.
卤化物钙钛矿因其优异的光学性能和独特的电子结构而被用作光催化还原 CO 的光催化剂。然而，它们的光催化性能相对较差。在此，我们展示了一种新策略，即以 Mn 掺杂的 CsPb(Br/Cl) 混合卤化物钙钛矿作为催化剂来提高 CO 光还原效率。通过调节 Mn 的含量，获得了一系列 CsPb(Br/Cl):Mn 钙钛矿，并在 CO 转化为 CO 和 CH 方面表现出高效率。特别是对于最佳催化剂样品，CO 和 CH 的产率分别达到 1917 μmol g 和 82 μmol g，分别是 CsPbBr 的 14.2 倍和 1.4 倍。这项工作为提高钙钛矿在 CO 光还原中的反应活性提供了新的见解。
