Joshi Gayatri, Saha Avishek, Dutta Arnab, Khatua Saumyakanti
Chemistry Discipline, Indian Institute of Technology Gandhinagar, Palaj, Gujarat 382355, India.
CSIR-Central Scientific Instruments Organization (CSIR-CSIO), Chandigarh 160030, India.
ACS Appl Mater Interfaces. 2022 Aug 31;14(34):38815-38823. doi: 10.1021/acsami.2c10152. Epub 2022 Aug 18.
Near-infrared (NIR) photon-driven H production from water is regarded as one of the best routes for establishing a sustainable hydrogen-based energy economy. Here, we have developed a gold nanoprism-based photocatalytic assembly, rationally capped with an amine and a silane ligand pair, which exhibited an excellent H production rate (146 μL mg h) in neutral water while achieving an absolute incident photon-to-hydrogen conversion efficiency of 0.53%. An array of spectroscopic and microscopic experiments unravel that the amine ligand scavenges the hot hole while the silane aids the H production via hydrolysis during the photocatalysis on the plasmon surface. This photocatalytic H production reactivity can be retained for multiple cycles following the replenishment of amine and silane. Hence, this photocatalytic assembly can set up the template for a large-scale NIR-driven H production unit.
近红外（NIR）光子驱动水制氢被认为是建立可持续氢基能源经济的最佳途径之一。在此，我们开发了一种基于金纳米棱镜的光催化组件，通过合理地用胺和硅烷配体对进行封端，该组件在中性水中表现出优异的产氢速率（146 μL mg⁻¹ h⁻¹），同时实现了0.53%的绝对入射光子到氢的转换效率。一系列光谱和显微镜实验表明，在等离子体表面的光催化过程中，胺配体捕获热空穴，而硅烷通过水解辅助产氢。在补充胺和硅烷后，这种光催化产氢反应性可以保留多个循环。因此，这种光催化组件可为大规模近红外驱动的制氢装置建立模板。
