Xing Congcong, Zhang Yu, Liu Yongpeng, Wang Xiang, Li Junshan, Martínez-Alanis Paulina R, Spadaro Maria Chiara, Guardia Pablo, Arbiol Jordi, Llorca Jordi, Cabot Andreu
Catalonia Institute for Energy Research (IREC), Sant Adrià de Besòs, 08930 Barcelona, Spain.
Institute of Energy Technologies, Department of Chemical Engineering and Barcelona Research Center in Multiscale Science and Engineering, Universitat Politècnica de Catalunya, EEBE, 08019 Barcelona, Spain.
Nanomaterials (Basel). 2021 May 25;11(6):1399. doi: 10.3390/nano11061399.
The photodehydrogenation of ethanol is a sustainable and potentially cost-effective strategy to produce hydrogen and acetaldehyde from renewable resources. The optimization of this process requires the use of highly active, stable and selective photocatalytic materials based on abundant elements and the proper adjustment of the reaction conditions, including temperature. In this work, CuO-TiO type-II heterojunctions with different CuO amounts are obtained by a one-pot hydrothermal method. The structural and chemical properties of the produced materials and their activity toward ethanol photodehydrogenation under UV and visible light illumination are evaluated. The CuO-TiO photocatalysts exhibit a high selectivity toward acetaldehyde production and up to tenfold higher hydrogen evolution rates compared to bare TiO. We further discern here the influence of temperature and visible light absorption on the photocatalytic performance. Our results point toward the combination of energy sources in thermo-photocatalytic reactors as an efficient strategy for solar energy conversion.
乙醇的光脱氢反应是一种可持续且具有潜在成本效益的策略，可从可再生资源中生产氢气和乙醛。该过程的优化需要使用基于丰富元素的高活性、稳定且选择性的光催化材料，并适当调整反应条件，包括温度。在这项工作中，通过一锅水热法获得了具有不同氧化铜含量的氧化铜-二氧化钛II型异质结。评估了所制备材料的结构和化学性质及其在紫外光和可见光照射下对乙醇光脱氢反应的活性。与纯二氧化钛相比，氧化铜-二氧化钛光催化剂对乙醛生成表现出高选择性，析氢速率高达其十倍。我们在此进一步识别了温度和可见光吸收对光催化性能的影响。我们的结果表明，热光催化反应器中能源的组合是太阳能转换的有效策略。
