1. Lee E. Brecher and Christopher K. Wu, “Electrolytic decomposition of water”, Westinghouse Electric Corp., Patent 3,888,750, June 10, 1975.
2. Solar hydrogen production by the Hybrid Sulfur process
3. Turchetti, L., Liberatore, R., Sau, S. and Tizzoni, A.C. Carbon-free Production of Hydrogen via the Solar Powered Hybrid Sulfur Cycle: the SOL2HY2 Project. Chemical Engineering Transactions, 2015 (43), 2179–2184.
4. Novel process concept for the production of H2 and H2SO4 by SO2-depolarized electrolysis
5. A thermodynamic analysis of the SO2/H2SO4 system in SO2-depolarized electrolysis