Improved hydrogen gas sensing performance of Pd–Ni alloy thin films

This study examined the palladium (Pd)-nickel (Ni) alloy films' ability to detect hydrogen (H2) at various Ni concentrations. The co-sputtering method was used to make the Pd–Ni alloy sensors. The response of the Pd–Ni alloys sensor reduced linearly as Ni8% concentration was added to Pd, and the resistance of the Pd–Ni alloys was reversible upon exposure to H2 gas with absorption and desorption characteristics. The experimental findings demonstrated that the Pd–Ni alloy sensor response time of 11 s was much faster than that of pure Pd, with great selectivity and stability for a period of 90 days.