This paper reports on the H2 gas sensing technique which has great importance in various practical applications. One of the current challenges lies in the H2 gas sensing technique is a high-temperature operation that increases explosion risk. To this objective, the room temperature chemochromic H2 sensing technique is an alternative, yet the development is not explored widely. We developed a novel quasi-reversible H2 sensing nanocomposite using an optimized ratio of Pd, WO3, and polyvinylpyrrolidone (PVP). It provides rapid eye-readable chemochromic response with a long recovery time for multiple repeated cycles, which has potential importance in industrial monitoring.
ACKNOWLEDGMENT This work was supported by the Korea Energy Technology Evaluation and Planning (Project No: 20203030040030) funded by the Ministry of Trade, Industry, and Energy, and by the Commercialization Promotion Agency for R&D Outcomes (Project No: 2021-JDH-2-SB-1) funded by the Ministry of Science and ICT, Republic of Korea.This work was supported by the Korea Energy Technol- ogy Evaluation and Planning (Project No: 20203030040030) funded by the Ministry of Trade, Industry, and Energy, and by the Commercialization Promotion Agency for R&D Outcomes (Project No: 2021-JDH-2-SB- 1) funded by the Ministry of Science and ICT, Republic of Korea.