Study on the Cu-P system with water for hydrogen production

Hydrogen production was studied in the Cu-P oxidation-reduction system with water. The influence of Cu /P ratio, reaction temperature, acidity and additional Cu on hydrogen yield was investigated. The green process of Cu-P system was realized by the design of the copper recycling and the phosphorus transformation and utilization. The results showed the hydrogen yield from the hydrogen atom in the reaction was mainly dependent on the Cu/P ratio and the reaction temperature, with the optimal yield of 18.6 mL under the conditions of 95 ℃ and 0.05 mol ratio of Cu to P with 0.20 g CuSO₄·5H₂O. H₂O₂ oxidation of elemental Cu in Cu-P system was also achieved for 10 times recycling under acidic condition. FT-IR and XRD results revealed that H₂PO₃-from the hydrogen production process could be converted into the new antirust CaHPO₃·H₂O with Ca(OH)₂.