Study on the role of Pd and ZrVFe hydrogen storage alloy in Pd/ ZrVFe catalyst for hydrogen elimination performance

Hydrogen energy has been considered to be one of the most potential clean energy, but its widespread availability is limited by hydrogen safety. Herein, a hydrogen-oxygen combination catalyst is designed based on a ZrVFe hydrogen storage alloy loaded with Pd, which exhibits excellent hydrogen elimination capability at low temperature, broad hydrogen concentration range and other complex working environments. The results show that the activity of the Pd/ZrVFe catalyst is dependent on the Pd loadings, and the 2 wt% Pd/ZrVFe catalyst can initiate the hydrogen-oxygen elimination reaction rapidly at similar to 30 degrees C under above 2 vol% hydrogen concentration and 2 L min(-1) inlet gas flow with a 96% hydrogen elimination efficiency. The Pd/ZrVFe catalyst has excellent hydrogen elimination performance at 2-20 vol% hydrogen concentration, especially at hydrogen concentration above 10%, the hydrogen elimination efficiency can reach more than 99%, and the highest hydrogen elimination rate is as high as 182.6 mL min(-1)center dot g(-1). In addition, the Pd/ZrVFe catalyst is almost unaffected by irradiation and aerosol poisoning, and this catalyst provided better resistance to iodine vapor poisoning compared to other catalysts. This work opens a new window for addressing hydrogen safety issues.