窒素含有官能基導入ガラス状炭素電極上への白金粒子電着を用いた溶存水素分子のアンペロメトリックフローインジェクション分析
A novel amperometric sensor for dissolved molecular hydrogen was constructed using electrodeposited platinum particles on glassy carbon electrodes bearing nitrogen-containing functional groups (Pt-NGC). The electrode surface was covalently functionalized through electrochemical oxidation and reduction steps. Hydrodynamic voltammetry revealed redox activity between hydrogen ions and hydrogen molecules at highly positive potentials, confirming electrocatalytic oxidation of dissolved H2. When integrated into a flow injection analysis (FIA) system, the sensor produced reproducible current-time profiles, with each measurement completed in approximately 15 seconds. A linear correlation between oxidation current and dissolved hydrogen concentration was established, enabling quantitative determination. Compared with conventional fabrication approaches requiring carbon powder immobilization via Nafion coating and high-temperature treatment, the direct surface modification method employed here is substantially simpler and more practical.
Electrodeposited platinum particles on nitrogen-functionalized glassy carbon electrodes catalyze the electrochemical oxidation of dissolved H2 molecules; the resulting anodic current serves as a quantitative signal proportional to dissolved hydrogen concentration.
The delivery route is not clearly identifiable from this paper. For hydrogen intake, inhalation is the most efficient route; inhalation, however, carries explosion risk (empirical LFL of 10%; high-concentration devices are not recommended).
See also:
https://h2-papers.org/en/papers/28603189