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The area of "green" energy carriers utilization is rapidly developing in the world today. Renewable hydrogen has promising potential as an ecologically safe energy carrier. However, production, storage, transportation and utilization of hydrogen possess certain risks due to the high likelihood of ignition. In this paper, we have demonstrated the design and realization of the colorimetric hydrogen sensor in different liquids. A proposed colorimetric sensor is based on corel-shell Au@Pd nanoparticles, additionally grafted by metal-organic framework IRMOF-20 layer, responsible for hydrogen entrapping. The combination of localized surface plasmon, high affinity of the palladium surface in hydrogen sorption and selectivity of IRMOF-20 towards this gas leads to apparent color change of nanoparticles suspension in hydrogen presence. The proposed approach is favored by high sensitivity, ease of use, low detection limit, and fast response time.
Keywords: Colorimetric hydrogen sensor, hydrogen detection, IRMOF-20, core-shell nanoparticles, gold-palladium nanoparticles, surface plasmon resonance© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.