Decoupled photoelectrochemical water splitting system for centralized hydrogen production
Photoelectrochemical (PEC) water splitting offers an elegant approach for solar energy conversion into hydrogen fuel. Large-scale hydrogen production requires stable and efficient photoelectrodes and scalable PEC cells that are fitted for safe and cost-effective operation. One of the greatest challe...
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| creator | Landman, Avigail Halabi, Rawan Dias, Paula Dotan, Hen Mehlmann, Alexander Shter, Gennady E Halabi, Manar Naserladeen, Omayer Mendes, Adélio Grader, Gideon S Rothschild, Avner |
| description | Photoelectrochemical (PEC) water splitting offers an elegant approach for solar energy conversion into hydrogen fuel. Large-scale hydrogen production requires stable and efficient photoelectrodes and scalable PEC cells that are fitted for safe and cost-effective operation. One of the greatest challenges is the collection of hydrogen gas from millions of PEC cells distributed in the solar field. In this work, a separate-cell PEC system with decoupled hydrogen and oxygen cells was designed for centralized hydrogen production, using 100 cm2 hematite (a-Fe2O3) photoanodes and nickel hydroxide (Ni(OH)2) / oxyhydroxide (NiOOH) electrodes as redox mediators. The operating conditions of the system components and their configuration were optimized for daily cycles, and ten 8.3 h cycles were carried out under solar simulated illumination without additional bias at an average short-circuit current of 55.2 mA. These results demonstrate successful operation of a decoupled PEC water splitting system with separate hydrogen and oxygen cells. |
| doi_str_mv | 10.48550/arxiv.2009.03564 |
| format | Article |
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| subjects | Circuits Hematite Hydrogen Hydrogen fuels Hydrogen production Hydrogen-based energy Nickel compounds Physics - Applied Physics Physics - Materials Science Short circuit currents Solar energy conversion Water splitting |
| title | Decoupled photoelectrochemical water splitting system for centralized hydrogen production |
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