hydrogen has promise as a clean energy carrier that can be generated from renewable energy carrier that can be generated from renewable energy sources, helping solve some critical problems such as the depletion of fossil fuel resources, pollution, and climate change due to greenhouse gas emissions. Currently, hydrogen is widely used in ammonia synthesis, oil refining, fuel cells, and rocket engines. However, hydrogen production, storage, and transport can be hazardous because hydrogen is flammable or explosive if not handled properly. Therefore, hydrogen sensors that are capable of leak detection,especially at the ppm level, are important.