Jakubow-Piotrowska Katarzyna, Witkowski Bartlomiej, Wrobel Piotr, Miecznikowski Krzysztof, Augustynski Jan
Centre of New Technologies, University of Warsaw, S. Banacha 2c, 02-097 Warsaw, Poland.
Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland.
Nanomaterials (Basel). 2024 Dec 13;14(24):2001. doi: 10.3390/nano14242001.
WO/Ag/TiO composite photoelectrodes were formed via the high-temperature calcination of a WO film, followed by the sputtering of a very thin silver film and deposition of an overlayer of commercial TiO nanoparticles. These synthetic photoanodes were characterized in view of the oxidation of a model organic compound glucose combined with the generation of hydrogen at a platinum cathode. During prolonged photoelectrolysis under simulated solar light, these photoanodes demonstrated high and stable photocurrents of ca. 4 mA cm due, on one hand, to the occurrence of the so-called photocurrent doubling and, on the other hand, to the plasmonic effect of Ag nanoparticles. The post-photoelectrolysis analyses of the electrolyte demonstrated the formation of high-value final glucose photo-reforming products, principally gluconic acid, erythrose and formic acid.
通过对 WO 薄膜进行高温煅烧，接着溅射一层极薄的银膜，并沉积一层商用 TiO 纳米颗粒，形成了 WO/Ag/TiO 复合光电极。鉴于在铂阴极上模型有机化合物葡萄糖的氧化与氢气的生成，对这些合成光阳极进行了表征。在模拟太阳光下长时间光电解过程中，一方面由于所谓的光电流加倍现象的出现，另一方面由于 Ag 纳米颗粒的等离子体效应，这些光阳极表现出约 4 mA/cm² 的高且稳定的光电流。对电解液进行的光电解后分析表明，形成了高价值的最终葡萄糖光重整产物，主要是葡萄糖酸、赤藓糖和甲酸。
