H2 sensors play a crucial role in the development of hydrogen (H2) energy and safety monitoring. Therefore, efficiently and rapidly detecting low concentrations of H2 is a fundamental challenge that needs to be addressed in the field of H2 sensors. In this study, we present a highly sensitive H2 gas sensor based on Pd-nanoparticles (NPs)-decorated transfer-free three-dimensional (3D) graphene. 3D graphene provides an increased surface area for enhanced gas adsorption and reaction kinetics. The integration of PdNPs improved the electron transport properties, resulting in a higher sensitivity. The PdNP-decorated 3D graphene sensor exhibited a remarkable gas response of 41.9% under 3% H2 exposure. The transfer-free synthesis process ensures the excellent conductivity of 3D graphene to further enhance its overall sensing performance. These discoveries propel current gas-sensing technologies forward and introduce fresh opportunities for the development of dependable sensors that can effectively enhance industrial safety and public security.
This research was supported by the Basic Science Research Program through the National Research Foundation of Korea, funded by the Korean government ( MSIT , RS-2023-00208311 ). In addition, this work was supported by the KIST Institutional Program (Project No. 2E31854-22-066 ) from the Korea Institute of Science and Technology . This work was supported by the Technology Innovation Program ( 20024822 , Development of low dielectric constant hybrid substrate for 6G terahertz communication) funded By the Ministry of Trade, Industry & Energy ( MOTIE , Korea).
