Oxygen-deficient solar generator

What are the energy and exergy efficiencies of solar-based oxygenation and ventilation systems?

Maximum energy and exergy efficiencies of the developed system are 14.3% and 13.4%. In this study, a new solar-based fuel cell-powered oxygenation and ventilation system is presented for COVID-19 patients. Solar energy is utilized to operate the developed system through photovoltaic panels.

What is a simulated oxygen vacancy configuration?

Starting with 0.125 and 0.25 4-coordinated oxygen vacancy concentrations corresponding to one and two oxygen vacancies in the cell (named 1O v and 2O v, respectively), the simulated configurations are as fellow: (i) Single hydrogen atom sitting in oxygen vacancy of one oxygen-vacancy structure (named 1H Ov ).

Does BZ have oxygen deficiency?

The presence of oxygen deficiency in BZ was further evidenced by thermogravimetric analysis ( Supplementary Figure S6) in the presence of oxygen, which shows a weight increment after ~150 °C, indicating the oxygen uptake.

Is zirconia a good material for oxygen gas sensors?

Those oxygen vacancies made Zirconia a good material for use in oxygen gas sensors 5 and solid oxide fuel cells (SOFCs) 6. Therefore, many theoretical studies have been devoted to investigating the structural and electronic properties of pure and defected ZrO 2.

How does oxygen-deficient black zirconia (ZrO 2x) affect solar light absorption?

In conclusions, oxygen-deficient black zirconia (ZrO 2−x) was prepared via the magnesiothermic reduction in H 2 /Ar atmosphere, which resulted in a drastic increment in solar light absorption and band gap decrement (to 1.52 from 5.09 eV for white ZrO 2 ).

What is the redox potential for hydrogen generation?

For the H Ov -Ov and 1H Ov structures, the CBM is shifted downward to the redox potential of hydrogen generation by 0.3 and 0.39 V, respectively compared to the pristine and oxygen-deficient structures, indicating more favorable photocatalytic activity for hydrogen generation. Note that the VBM is still well below the potential of water oxidation.