Oh Jungkyun, Lee Jun Seop, Jang Jyongsik
School of Chemical and Biological Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Korea.
Department of Materials Science and Engineering, Gachon University, 1342 Seongnam-Daero, Sujeong-Gu, Seongnam-Si, Gyeonggi-Do 13120, Korea.
Polymers (Basel). 2020 Jun 26;12(6):1427. doi: 10.3390/polym12061427.
Despite being highly flammable at lower concentrations and causing suffocation at higher concentrations, hydrogen gas continues to play an important role in various industrial processes. Therefore, an appropriate monitoring system is crucial for processes that use hydrogen. In this study, we found a nanocomposite comprising of ruthenium nanoclusters decorated on carboxyl polypyrrole nanoparticles (Ru_CPPy) to be successful in detecting hydrogen gas through a simple sonochemistry method. We found that the morphology and density control of the ruthenium component increased the active surface area to the target analyte (hydrogen molecule). Carboxyl polypyrrole (CPPy) in the nanocomposite was protonated to increase the charge transfer rate during gas detection. This material-based sensor electrode was highly sensitive (down to 0.5 ppm) toward hydrogen gas and had a fast response and recovery time under ambient conditions. The sensing ability of the electrode was maintained up to 15 days without structure deformations.
尽管氢气在较低浓度下具有高度可燃性，在较高浓度下会导致窒息，但它在各种工业过程中仍然发挥着重要作用。因此，对于使用氢气的过程来说，合适的监测系统至关重要。在本研究中，我们发现一种由装饰在羧基聚吡咯纳米颗粒上的钌纳米团簇组成的纳米复合材料（Ru_CPPy），通过简单的声化学方法成功地检测到了氢气。我们发现钌组分的形态和密度控制增加了对目标分析物（氢分子）的活性表面积。纳米复合材料中的羧基聚吡咯（CPPy）被质子化，以提高气体检测过程中的电荷转移速率。这种基于材料的传感器电极对氢气高度敏感（低至0.5 ppm），在环境条件下具有快速的响应和恢复时间。电极的传感能力在长达15天的时间内保持不变，且结构无变形。
