The article discusses a study showcasing the fabrication and analysis of ultrathin platinum-gadolinium (PtGd) alloy films for resistive hydrogen gas sensing. Highlighting the importance of hydrogen as a clean energy source, the research emphasizes the need for efficient hydrogen sensors to prevent safety hazards. By investigating the functional properties of PtGd alloy films with different compositions, the study reveals their temperature-dependent electrical behavior and sensitivity to hydrogen concentrations. The results indicate that the PtGd films, synthesized through a meticulous deposition and annealing process, exhibit significant potential for gas sensing applications. With successful alloy formation and uniformity confirmed through various characterization techniques, the sensors demonstrated a strong correlation with Nordheim's rule and showed enhanced sensitivity to hydrogen. Moreover, the PtGd alloy films displayed reduced response times with increasing hydrogen concentrations, with the Pt25Gd75 film exhibiting the minimum response time. By exploring absorption isotherm models, the researchers concluded that Langmuir's absorption isotherm closely matched the experimental results, providing valuable insights into the sensing mechanisms of the PtGd films. The study's findings suggest that the unique combination of Pt and Gd offers a promising avenue for developing highly reactive and selective hydrogen gas sensors, crucial for accurate detection. The research contributes to advancing gas sensor technology and paves the way for designing optimized sensors with improved performance characteristics, highlighting the PtGd alloy's potential in enhancing hydrogen sensing applications.