Huang Qiang, Tian Changqing, Lai Junan, Qi Fei, Zhang Nan, Liu Jiaxin, Liang Zhiyu, Wu Daofu, Tang Xiaosheng
College of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China.
Key Laboratory of Optoelectronic Technology & Systems (Ministry of Education), College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China.
Inorg Chem. 2022 Sep 12;61(36):14447-14454. doi: 10.1021/acs.inorgchem.2c02417. Epub 2022 Aug 31.
In response to calling for a sustainable and carbon-neutral economy, the conversion of CO to useful chemicals using the solar energy is a potential tactic to relieve the global energy dilemma and environmental issues, which has been a hot topic so far. Recently, the lead halide perovskites as novel photocatalysts have attracted researchers' interests. However, they generally encounter poor stability and lead toxicity, restricting their large-scale practical applications. Here, the lead-free CsTeX (X = Cl, ClBr, Br, BrI, and I) perovskite microcrystals with strong stability were prepared and used to realize the CO photocatalytic reduction efficiently. The prepared CsTeBr microcrystals delivered stronger photocatalytic ability than many previously reported photocatalysts, with the CO and CH yields of 308.63 and 60.42 μmolg, respectively, under 3 h of illumination. The presented strategy in our work provides new ideas of designing and preparing efficient and practical CO reduction photocatalysts based on nonleaded and high-stability halide perovskites.
为响应构建可持续和碳中和经济的号召，利用太阳能将一氧化碳转化为有用的化学品是缓解全球能源困境和环境问题的一种潜在策略，这一策略至今一直是热门话题。最近，卤化铅钙钛矿作为新型光催化剂引起了研究人员的兴趣。然而，它们通常稳定性较差且存在铅毒性，限制了其大规模实际应用。在此，制备了具有强稳定性的无铅CsTeX（X = Cl、ClBr、Br、BrI和I）钙钛矿微晶，并用于高效实现一氧化碳的光催化还原。所制备的CsTeBr微晶比许多先前报道的光催化剂具有更强的光催化能力，在光照3小时的条件下，一氧化碳和甲烷的产率分别为308.63和60.42 μmol/g。我们工作中提出的策略为基于无铅且高稳定性卤化物钙钛矿设计和制备高效实用的一氧化碳还原光催化剂提供了新思路。
